- Discuss - lists.centos.org

Accessing shell in CentOS 4 install
by Brendon Colby 21 Apr '05

21 Apr '05

Greetings, I'm having trouble accessing a shell when I boot into the installation of CentOS 4 (text mode). Alt-2 (which is where the shell should be started?) shows nothing (nothing any other console). How do I access the shell within the installation? Thanks. Brendon Colby

3 3

NX (execshield)
by tobaccofarm 21 Apr '05

21 Apr '05

I heard something about execshield in some thread on OSnews.com. Does CentOS4 have an execshield compiled kernel? kind regards, Peter

4 3

CentOS-announce Digest, Vol 2, Issue 10
by centos-announce-request＠centos.org 21 Apr '05

21 Apr '05

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CESA-2005:332 Low CentOS 4 i386 and x86_64 xloadimage - security update (Johnny Hughes) 2. CESA-2005:366 Important CentOS 4 i386 and x86_64 kernel - security update (Johnny Hughes) 3. CESA-2005:392 Critical CentOS 4 i386 and x86_64 HelixPlayer - security update (Johnny Hughes) 4. CESA-2005:383 Important CentOS 4 ia64 firefox - security update (Pasi Pirhonen) ---------------------------------------------------------------------- Message: 1 Date: Wed, 20 Apr 2005 09:34:08 -0500 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CESA-2005:332 Low CentOS 4 i386 and x86_64 xloadimage - security update To: centos-announce(a)centos.org Message-ID: <1114007648.5594.35.camel(a)myth.home.local> Content-Type: text/plain; charset="us-ascii" CentOS Errata and Security Advisory CESA-2005:332 for i386 and x86_64 https://rhn.redhat.com/errata/RHSA-2005-332.html refers: The following updated files have been uploaded and are currently syncing to the mirrors: i386: xloadimage-4.1-34.RHEL4.i386.rpm x86_64: xloadimage-4.1-34.RHEL4.x86_64.rpm src: xloadimage-4.1-34.RHEL4.src.rpm install with this command: yum update xloadimage Thanks, Johnny Hughes

1 0

kbd remove error
by Mark Quitoriano 21 Apr '05

21 Apr '05

hi guys i just partially upgrade centos 3.4 to centos 4(using apt-get) and im having a problem removing kdb 1.08-10.2, kbd 1.12-2 is already installed and im trying to remove kdb 1.08 through apt-get and rpm -e here's what happened when i use apt-get: # apt-get remove kbd#1.08-10.2 Reading Package Lists... Done Building Dependency Tree... Done The following packages will be REMOVED: kbd#1.08-10.2 0 upgraded, 0 newly installed, 1 removed and 20 not upgraded. Need to get 0B of archives. After unpacking 2018kB disk space will be freed. Do you want to continue? [Y/n] y Committing changes... Preparing... ########################################### [100%] error reading information on service keytable: No such file or directory error: %trigger(kbd-1.08-10.2) scriptlet failed, exit status 1 W: Some errors occurred while running transaction here's what happened when i use rpm: # rpm -e kbd-1.08-10.2 error reading information on service keytable: No such file or directory error: %trigger(kbd-1.08-10.2) scriptlet failed, exit status 1 -- Regards, Mark Quitoriano, CCNA

5 7

firefox or mozilla won't start
by Jay 21 Apr '05

21 Apr '05

Greetings When I start firefox or mozilla I get an hourglass for 3 seconds then nothing happends. Dropping to a terminal and typing firefox just returns to the command line. I re-installed firrefox and it installs fine until I quit then the same situation happends. After re-installing firefox it will run but the same situation happens where it won't start. I have installed int my home directory or into /usr/local/firfox. ( Cent OS 4.0 with all patches applied. Firefox 1.0.2 ) Ideas? Thanks -Jay

3 2

Forums
by Lee Parmeter 21 Apr '05

21 Apr '05

I created an account on the Forums this morning, but I got an error saying they were having a problem sending e-mail. I sent a message to the webmaster and no response either. So I can't post to the forum until my account is activated. Are the forums new? By the amount of traffic on the list, this must be where most people resolved their problems. I am thinkgng about installing CentOS 4 on my file server at home which is now running RH9. -- Lee Parmeter Emperor, linXos - The Flying Penguin http://www.linXos.com Linux Registered User #337161 'It's free. It works. Duh.'" - Eric Harrison "To announce that there must be no criticism of the president, or that we are to stand by the president, right or wrong, is not only unpatriotic and servile, but is morally treasonable to the American public." � President Theodore Roosevelt "Patriotism is supporting your country all the time and your government when it deserves it." - Mark Twain God is not a republican or a democrat nor is His government a democracy! - Lee Parmeter The United States is NOT a democracy, it was founded as a Republic for a specific reason, to protect Liberty for all. In contrast, a democracy insures Liberty to the majority only! It is only recently that politicians have been calling the US a democracy! This is just NOT true! - Lee Parmeter __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

3 3

1 GB RAM CentOS 4 only sees 885 MB
by ryan 21 Apr '05

21 Apr '05

Is this a known bug? Suprisingly google didn't turn up much. I'm running DDR RAM and a AMD XP processor on CentOS 4.

4 4

CentOS 4 and Intel P4 without Hyper-Threading vs. Intel P4 with Hyper-Threading
by Robert Hanson 20 Apr '05

20 Apr '05

Hello Does anyone know of any possible concerns in moving a "production" CentOS 4 install from one machine to another where the "only" difference is that the processor changes from a 1.8 Intel P4 "without" Hyper-Threading to a 3.0 Intel P4 "with" Hyper-Threading ? I am guessing not, yet I "have to" ask. Regards, - rh

5 6

recompiling kernel
by ryan 20 Apr '05

20 Apr '05

Can anyone supply a link on a how-to (or provide intructions) on recompiling a centos 4 kernel? I'm trying my old rhel 3 commands and they arent working.

3 2

Where is .xsession-errors
by Hardy Beltran Monasterios 20 Apr '05

20 Apr '05

Hi Yesterday I was using OpenOffice Impress, doing many cut/paste operations with images, and without any notice/message/warning the application die. Then I look for ~/.xsession-errors file to see any signal about the problem, but I realized that ~/.xsession-errors is no longer present. This is a new behaviour of X.org ? I'm running CentOS 4 and XFree86 Version 4.3.0.1 (Debian 4.3.0.dfsg.1-8 20040928112350 fabbione(a)fabbione.net) Release Date: 15 August 2003 X Protocol Version 11, Revision 0, Release 6.6 Build Operating System: Linux 2.4.26 i686 [ELF] Build Date: 28 September 2004 Before reporting problems, check http://www.XFree86.Org/ to make sure that you have the latest version. Module Loader present OS Kernel: Linux version 2.4.27-2-686 (horms(a)charles.lab.ultramonkey.org) (gcc version 3.3.5 (Debian 1:3.3.5-6)) #1 Thu Jan 20 11:10:41 JST 2005 Thanks for any clue -- Hardy Beltran Monasterios - www.hardy.com.bo hardy at acm dot org Usuario Linux #50949 - http://counter.li.org La Paz, Bolivia

2 2

FIX: Where is .xsession-errors
by Hardy Beltran Monasterios 20 Apr '05

20 Apr '05

Hi Yesterday I was using OpenOffice Impress, doing many cut/paste operations with images, and without any notice/message/warning the application die. Then I look for ~/.xsession-errors file to see any signal about the problem, but I realized that ~/.xsession-errors is no longer present. This is a new behaviour of X.org ? I'm running CentOS 4 and X Window System Version 6.8.1 Release Date: 17 September 2004 X Protocol Version 11, Revision 0, Release 6.8.1 Build Operating System: Linux 2.6.9-5.0.3.ELsmp i686 [ELF] Current Operating System: Linux salsa.hardy.com.bo 2.6.9-5.0.3.EL #1 Sat Feb 19 18:26:49 CST 2005 i686 Build Date: 21 February 2005 Build Host: bhrama.build.karan.org Before reporting problems, check http://wiki.X.Org to make sure that you have the latest version. Module Loader present OS Kernel: Linux version 2.6.9-5.0.3.EL (buildcentos@build4-1386) (gcc version 3.4.3 20041212 (Red Hat 3.4.3-9.EL4)) #1 Sat Feb 19 18:26:49 CST 2005 Thanks for any clue -- Hardy Beltran Monasterios - www.hardy.com.bo hardy at acm dot org Usuario Linux #50949 - http://counter.li.org La Paz, Bolivia

1 0

Torrents Updated ( CentOS 3 and CentOS 4 )
by Karanbir Singh 20 Apr '05

20 Apr '05

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 During the early hours of the morning, we updated all .torrent files hosted at CentOS. If you are presently hosting a seed for CentOS downloads, please update the torrent files. This change effects all torrents ( CentOS 3 and CentOS 4, on all platforms, including CD and DVD iso ). Steps to update the .torrent file : 1) download the new .torrent file for the ISO set that you are hosting on Bit Torrent ( URL's provided ) 2) shut down the BitTorrent Client 3) replace the old .torrent file with the new .torrent 4) restart the BitTorrent Client The Tracker URL for the new torrents should be at http://torrent.centos.org:6969/<torrentname> . After you have run the update, make sure that the URL has changed to this link. You might want to keep in mind that this process does not require you to download the entire ISO Set again. It will continue to share the files already on your machine. Many thanks to everyone who is hosting seeds for us! URL's to download the new files from : CentOS 4, i386 : http://mirror.centos.org/centos/4/isos/i386/ CentOS 4, x86_64 : http://mirror.centos.org/centos/4/isos/x86_64/ CentOS 4, ia64 : http://mirror.centos.org/centos/4/isos/ia64/ CentOS 3, i386 : http://mirror.centos.org/centos/3/isos/i386/ CentOS 3, x86_64 : http://mirror.centos.org/centos/3/isos/x86_64/ CentOS 3, ia64 : http://mirror.centos.org/centos/3/isos/ia64/ CentOS 3, s390 : http://mirror.centos.org/centos/3/isos/s390/ CentOS 3, s390x : http://mirror.centos.org/centos/3/isos/s390x/ - -- Karanbir Singh <kbsingh(a)centos.org> -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (GNU/Linux) iD8DBQFCZnafI2ImR47onK8RAiFzAKCMvYqLlRvHRqb2GLnDIW+o/1TkFQCcC6E5 T0BNOPeP6brQtGn9y11JyiY= =pRZD -----END PGP SIGNATURE-----

1 0

Rid me of this boot GUI
by John Hinton 20 Apr '05

20 Apr '05

One of these days, RedHat might actually run me off!!!! AAAARGH!!!! Can anyone tell me how to get CentOS 4 to simply boot to the console in text mode? If I wanted a stinkin' GUI I would have installed winders! Now, my KVM and 25 foot cord is just too long to send a GUI signal across the room and I'm missing 50% of the screen.. striped vertically.. at about 1/8th inch spacing. Not really good enough to see what I'm in nor what the crap I'm doing. I do see I guess an Xterm window.. so I guess I can issue commands.. or... maybe I'll have to drag over a derned monitor. Shew!! Thanks, John Hinton

5 4

QoS on CentOS 4
by ryan 20 Apr '05

20 Apr '05

Hello, I'm looking for a (relatively) simple way to help shape upload connections on my firewall box (CentOS 4 + iptables). Does anyone know of any packages, other than wondershaper, that do this? thanks!

3 2

Apache, MySQL, and PHP
by Dexter Stowers 20 Apr '05

20 Apr '05

Hi, I need to ask a question about the usuage of these particular packages...do you install the binaries for each or do you use what comes with the OS out of the box??? The reason why I am asking is because I am having problems using the one that comes with the OS. Everything else runs great but I am using CentOS for the first time and I want to make sure that I am not spinning my wheels doing something that I should leave alone. Thanks! -- Dexter Systems Administrator Clemson University

6 6

CentOS-announce Digest, Vol 2, Issue 9
by centos-announce-request＠centos.org 20 Apr '05

20 Apr '05

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CESA-2005:332 Low CentOS 3 ia64 xloadimage - security update (Pasi Pirhonen) 2. CESA-2005:332 Low CentOS 3 s390(x) xloadimage - security update (Pasi Pirhonen) 3. CESA-2005:332 Low CentOS 4 ia64 xloadimage - security update (Pasi Pirhonen) 4. CESA-2005:364-01: Moderate CentOS 2 i386 logwatch security update (John Newbigin) 5. CESA-2005:332-01: Low CentOS 2 i386 xloadimage security update (John Newbigin) 6. CESA-2005:366 Important CentOS 3 ia64 kernel - kernel security update (Read the NOTES) (Pasi Pirhonen) 7. CESA-2005:332-01: Low CentOS 3 i386 xloadimage security update (Lance Davis) 8. CESA-2005:332-01: Low CentOS 3 x86_64 xloadimage security update (Tru Huynh) ---------------------------------------------------------------------- Message: 1 Date: Tue, 19 Apr 2005 23:36:56 +0300 From: Pasi Pirhonen <upi(a)iki.fi> Subject: [CentOS-announce] CESA-2005:332 Low CentOS 3 ia64 xloadimage - security update To: centos-announce(a)centos.org Message-ID: <20050419203656.GX11443(a)core.upi.iki.fi> Content-Type: text/plain; charset="us-ascii" CentOS Errata and Security Advisory CESA-2005:343 https://rhn.redhat.com/errata/RHSA-2005-332.html The following updated files have been uploaded and are currently syncing to the mirrors: files: xloadimage-4.1-34.RHEL3.ia64.rpm -- Pasi Pirhonen - upi(a)iki.fi - http://iki.fi/upi/

1 0

Has this list died?
by Robert Moskowitz 20 Apr '05

20 Apr '05

I have not seen anything for a day, not even my own posts to this list....

5 5

hddtemp package
by Collins Richey 20 Apr '05

20 Apr '05

Just idle curiosity. I've always been fond of the simple hddtemp utility. I tried 'yum install hddtemp' (I have dag in my repos), but it was not found. Google found it on '/pub/dag/dries/packages...'. So I downloaded it, installed (Centos4), and it works just fine. Just wondering why it's not in the dag el4 repo? -- Collins When I saw the Iraqi people voting three weeks ago, 8 million of them, it was the start of a new Arab world.... The Berlin Wall has fallen. - Lebanese Druze leader Walid Jumblatt

12 15

RE: [CentOS] Rid me of this boot GUI
by Marc Powell 19 Apr '05

19 Apr '05

> -----Original Message----- > From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On > Behalf Of John Hinton > Sent: Tuesday, April 19, 2005 5:27 PM > To: CentOS(a)caosity.org > Subject: [CentOS] Rid me of this boot GUI > > One of these days, RedHat might actually run me off!!!! AAAARGH!!!! > > Can anyone tell me how to get CentOS 4 to simply boot to the console in > text mode? If I wanted a stinkin' GUI I would have installed winders! > Now, my KVM and 25 foot cord is just too long to send a GUI signal > across the room and I'm missing 50% of the screen.. striped vertically.. > at about 1/8th inch spacing. Not really good enough to see what I'm in > nor what the crap I'm doing. I do see I guess an Xterm window.. so I > guess I can issue commands.. or... maybe I'll have to drag over a derned > monitor. Shew!! Edit /etc/inittab. Change your default runlevel from X11 to Full multiuser mode. (5 to 3). -- Marc

1 0

NTP on CentOS 3.4
by Jason Dixon 19 Apr '05

19 Apr '05

Running CentOS 3.4, I enabled the ntpd service and noticed that it opens up a hole in the firewall for ntp from 127.127.1.0. I look in the ntpd initscript and see that it's reading in servers from /etc/ntp/step-tickers. However, that file is empty... /etc/ntp/ntpservers contains clock.redhat.com and clock2.redhat.com, but ntpservers isn't used *anywhere*. This looks like a bug, but maybe I'm overlooking something stupid. I reviewed the RHEL manuals, but they only reference the GUI utilities now (grrr). Any ideas a) where 127.127.1.0 is coming from (parsing bug?), or b) why the initscript doesn't reference /etc/ntp/ntpservers? Thanks, -- Jason Dixon DixonGroup Consulting http://www.dixongroup.net

5 8

MailScanner With One vs Two Postfix Instances
by Kennedy Clark 19 Apr '05

19 Apr '05

An interesting point came up while recently discussing my Postfix virtual_alias issues with the MailScanner list. Apparently there is some risk with the "two instances of postfix" approach described in: http://www.hughesjr.com/content/view/12/30/Guides It sounds like Postfix and MailScanner can step on each other in the deferred queue. They recommended the single Postfix instance "hold" mechanism recommended here: http://www.sng.ecs.soton.ac.uk/mailscanner/install/postfix.shtml Here are the steps I used to convert: 1) service MailScanner stop 2) Edit MailScanner.conf and change Incoming Queue Dir = /var/spool/postfix.in/deferred to Incoming Queue Dir = /var/spool/postfix/hold 3) Rename /etc/postfix.in to /etc/postfix.old-in 4) Rename /var/spool/postfix.in to /var/spool/postifx.old-in 5) Edit /etc/postfix/master.cf and uncomment the "smtp inet n - n - - smtpd" that was commented out in Step #12 of the 2-step instructions 6) Edit /etc/postfix/main.cf and add: header_checks = regexp:/etc/postfix/header_checks 7) Create /etc/postfix/header_checks containing: /^Received:/ HOLD 8) service MailScanner start And you should be back in business. Note that the /etc/init.d/MailScanner script still references both an in and out Postfix instance; however, in looking at the code, once /etc/postfix.in is gone/renamed the "in" startup action becomes a no-op. I should also point out that there is absolutely NO implied criticism of the SUPERB guides Johnny has put out. I have found them to be extremely helpful -- thanks, Johnny! Regards, Kennedy

8 16

Problems installing Centos 3.4 & 4 using NFS + Kickstart
by Dr R L Oswald, Cranfield University UK 19 Apr '05

19 Apr '05

My hardware is Sun V65x servers, (6GB RAM/2xXeon3GHZ/36GB SCSI disk). I have NFS repositories of Centos 3.1, Centos 3.4, Centos 4 & RedHat 9.0 ISO distros set up. I use boot floppies for each o/s with the same kickstart file which is of course altered to point at the desired distro. With Centos 4 I have to use a boot CDROM, of course, rather than floppy disk. I wish to set up servers with either Centos 3.4 or 4 versions rather than RH9. Root disk partition is 24GB btw. The kickstart boot works fine with RH9 & Centos 3.1. However it fails with Centos 3.4 & Centos 4 but in different ways: Centos 3.4 ======== The kickstart proceeds normally, formats the partitions & starts the install. However at 52% of the way through, it aborts, always on the same file: "glibc-kernheaders-nnnn.rpm" The fatal error message is non-specific & suggests that media is defective or disk space inadequate. I have checked the md5 sums of the ISOs & they agree with the download site ones. I have also extracted the "glibc-kernheaders-nnnn.rpm" from the ISO image #1 & compared its' md5 sum with the same module from the /os/ directory on the download site & they also agree. I have also downloaded the ISOs again & they are the same md5s as the first set :-\ Centos4 ======= This install gets to the point at where it would normally try & mount up the CENTOS4 NFS repository which is on the same server as all the other distros (this runs RH9). It then goes into a loop whereby it keeps prompting for the name of the NFS server & the CENTOS directory, where it would normally just mount it & proceed with the installation. Anyone out there with similar experience & a working fix for this issue please ? Les Oswald

2 1

named problem
by Gerald Waugh 19 Apr '05

19 Apr '05

Hi, Running Centos4, and have a problem starting named, it's trying to write the pid to '/var/run/named/named.pid': Permission denied Should'ny it be writing to /var/named/chroot/var/run/named and I see this error; "ignoring config file logging statement due to -g option" Any help appreciated... Gerald

1 0

Centos Review on OSNEWS.
by bards1888 19 Apr '05

19 Apr '05

Can be found here; http://osnews.com/comment.php?news_id=10349

1 0

Install bombed
by Robert Moskowitz 19 Apr '05

19 Apr '05

See attached file. This was on an old DELL with removable drives.

3 2

newbie
by krishnaprasad 19 Apr '05

19 Apr '05

Dear all Can I get the kernel source for the centos 3.4 Release final kernel version is 2.4.21-27.0.2.EL Thanks Prasad

2 1

Have install diskette for 3.0, but can't find the .img for 4.0
by Robert Moskowitz 19 Apr '05

19 Apr '05

OK. I am in an emergency crunch. I need that 4.0 install diskette. Like 2 hours ago! Where is it???????? I don't want to have to install 3.0 on this box.

2 1

more: Have install diskette for 3.0, but can't find the .img for 4.0
by Robert Moskowitz 19 Apr '05

19 Apr '05

I have found something called: diskboot.img at: http://www.gtlib.gatech.edu/pub/centos/4/os/i386/images/ But it is 6Mb large (6411Kb) instead of 1411Kb And the rawreadwrirewin program gets an error on it when run on NT. On Win2000, it makes a diskette that fails to boot.. So really, HELP!!!! I 'just' discovered that my old bootable diskette is for Centos 3.0, and my other CDs are Centos 3.3. ================================================================ OK. I am in an emergency crunch. I need that 4.0 install diskette. Like 2 hours ago! Where is it???????? I don't want to have to install 3.0 on this box. Illegitimi non Carborundum

3 4

PCMCIA not working on IBM Thinkpad r40
by Joe Harb 19 Apr '05

19 Apr '05

I am running Centos 4 on a Thinkpad r40 and it does not see any pcmcia cards. I know the socket is good because I had it working with Fedora Core 3. A funny thing though, once I updated my fedora kernel to a certain rev. (don't remember the version) the card socket no longer worked. Going back to an un-upgraded install of Fedora 3 worked. Has anyone seen this problem and worked this out with Centos? Joe

2 1

spread the word
by donavan nelson 18 Apr '05

18 Apr '05

I'm going to disassociate from the whiteboxlinux domains... http://whiteboxlinux.net/news.php

1 0

Re: [CentOS] Serial ATA hardware raid.
by C.M. Connelly 18 Apr '05

18 Apr '05

"f" == franki <franki(a)htmlfixit.com> f> My main wholesaler sells Adaptec stuff, and I can get this f> one: f> http://www.techbuy.com.au/products/34526/I_OCARDS_HARDDRIVECONTROLLERS/Adap… f> For $450 it is a 4 port controller and has onboard 64MB ECC f> cache. I have one of these (it's in my mirror box). It's okay. It's not stunning, and I lost the array once (due to a bad drive and loose connectors more than the card). It runs under CentOS 3 without special drivers, but Adaptec also has some driver software (not sure whether it's newer or not -- it's ``minimally tested'' according to them). I also have an Adaptec 1210SA (two-port SATA), which is running under Debian with a custom kernel as I couldn't get it working (at all) under CentOS at the time I was building the machine. That card is a complete POS -- forget about hardware RAID, but it works okay with software RAID. If I had it to do over again, I would definitely go with 3Ware cards over the Adaptec cards. What you might save in money isn't worth the hassle. Claire -- *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* Claire Connelly cmc(a)math.hmc.edu Systems Administrator (909) 621-8754 Department of Mathematics Harvey Mudd College *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*

1 0

php mysql pronblem with server
by Gerald Waugh 18 Apr '05

18 Apr '05

Hi, I have a problem installing a minimal server configuration, with php and mysql. Seems like no matter what I try I never get a /usr/lib/php4/mysql.so. /usr/lib/php4 only has; ldap.so I installed on a workstation with "Everything" and I see /usr/lib/php4/ as; domxml.so gd.so imap.so ldap.so mbstring.so mysql.so ncurses.so odbc.so pgsql.so snmp.so xmlrpc.so TIA Gerald

1 1

Re: [CentOS] Serial ATA hardware raid.
by Bryan J. Smith 18 Apr '05

18 Apr '05

From: Pasi Pirhonen > This is as good insertion point as anything else, > for what i am going to say. > 3ware is working like a champ, but slowly. > The tuning won't make it magically go over 100MB/s sustained writes. I am bumping up against 100MBps on my bonnie write benchmarks on an older 6410. Now that's in RAID-0+1, and not RAID-5. > Random I/O sucks (what i've seen) for any SATA-setup. It depends. "Raw" ATA sucks for multiple operations because it has no I/O queuing. AHCI is trying to address that, but it's still unintelligent. 3Ware queues reads/writes very well, and sequences them as best as it can. But it's still not perfect. > Even for /dev/mdX. Now with MD, you're starting to taxi your interconnect on writes. E.g., with Microcontroller or ASIC RAID, you only push the data you write. With software (including "FRAID"), you push 2x for RAID-1. That's 2x through your memory, over the system interconnect into the I/O and out the PCI bus. When you talk RAID-3/4/5 writes, you slaughter the interconnect. The bottleneck isn't the CPU. It's the fact that for each stripe, you've gotta load from memory through the CPU back to memory - all over the system interconnect, before even looking at I/O. For 4+ modern ATA disks, your talking a roundtrip that costs you an aggregate percentage of your system interconnect time beyond 30%+. On a dynamic web or other CPU computational intensive server, it matters little. The XOR operations actually use very little CPU power. And the web or computational streams aren't saturating the interconnect. But when you are doing file server I/O, and the system interconnect is used for raw bursts of network I/O as much as storage, it kills. > Puny oldish A1000 can beat those with almoust factor of ten for random I/O, but being limited to > max. 40MB/s transfers by it's interface (UW/HVD). Or more like the i960 because, after all, RAID should stripe some operations across multiple channels. > But what i am going to say is that for my centos devel work > (as in my NFS-server), i just recently moved my 1.6TB raid under /dev/md5 with > HighPoint RocketRaid1820. > I don't care that NOT being hardware RAID. > The /dev/mdX beats the 3ware 9500S-8 formerly used hands down when you > do have 'spare CPU cycles to let kernel handle the parity operations'. It has nothing to do with CPU cycles but interconnect. XOR puts no strain on modern CPUs, it's the added data streams being feed from memory to CPU. Furthermore, using async I/O, MD can actually be _faster_ than hardware RAID. Volume management in an OS will typically do much better than a hardware RAID card when it comes to block writes. Of course the 9500S is still maturing. Which is why I still prefer to use 4 and 8 channel 7506/8506 cards with RAID-0+1. Even the AccelATA and 5000 left much to be desired before the 6000 and latter 7000/8000 series.

6 8

mod_authz_svn anyone?
by Howard Fore 18 Apr '05

18 Apr '05

Hey, Anyone know where I can find the Apache module mod_authz_svn? I'm trying to setup a subversion repository and would like to use that module for the authentication. yum doesn't find anything. Thanks. -- Howard Fore, howard.fore(a)gmail.com

2 3

Software RAID on CentOS 4
by centos.org_list＠000a.com 18 Apr '05

18 Apr '05

All this talk about SATA RAID in the past few days made me wonder... about possibly using software RAID, or at least trying it on my own workstations and eventually production servers, after I learn more about it. So, I started googling for tutorials and manuals, and there are usually two kinds I can find: 1. very basic "what is software RAID", or 2. complete 400+ page books on the topic sold at Amazon.com Nothing in between. :-( Does anyone know of a good resource where I could read up more on it, from properly setting up boot drives (and mirroring boot partitions to second drive in RAID-1 config), to setting up swap partition, to best practices, caveats, etc. All these articles usually also lack any kind of disk/data recovery info, procedures for detecting and swapping failed drives, etc. I'm mostly interested in simple RAID-1 for redundancy - just 2 drives per system, that's all. Typically on my hardware RAID boxes I set up a /boot, swap and / partitions, and would like to do the same using software RAID - again, with the ability to have a fully working boot partition and complete filesystem in case the main drive fails. Thanks for any pointers, whether online or off. I'm not adverse to buying a 400+ page book if it covers all this, but the books I came across so far had pretty bad reviews and lacked data recovery altogether, which would make them rather useless. Chris

2 1

inotify on rhel systems?
by Collins Richey 17 Apr '05

17 Apr '05

I just read an interesting article caleed "Monitor Linux file system events with inotify.", see http://www-128.ibm.com/developerworks/linux/library/l-inotify.html?ca=dgr-l…. I notice that /dev/inotify is not present on my CentOS4 system, so the necessary kernel patches are probably not present. Does anyone know if there are any plans afoot to provide this functionality for rhel systems? -- Collins When I saw the Iraqi people voting three weeks ago, 8 million of them, it was the start of a new Arab world.... The Berlin Wall has fallen. - Lebanese Druze leader Walid Jumblatt

3 4

CentOS4 upgradeany hangs while loading sata_via
by Norbert Kiesel 17 Apr '05

17 Apr '05

Hi, I have a machine running under CentOS 3.4 which I want to upgrade to CentOS 4. I booted using the CentOS 4 CD1 using "linux upgradeany". Problem is that loading sata_via never terminates. Ismod shows the sata_via module in state "Loading" while all others are in state "Live". The dmesg output shows that the module gets loaded, sees two disks, then prints info about the first one and is stuck there. I can of course provide the exact output if needed, but I would have to write it down by hand as the machine has no floppy and I can't write to the hard disk :-( Any ideas? I fear that if I just upgrade through yum, the machine won't boot afterwards. As this is one of our production DB machines, I'd rather not do that. Would compiling a kernel on my own with a newer version of sata_via and using that module be something worth trying? Best, Norbert

3 4

Re: [CentOS] Serial ATA hardware raid.
by Bryan J. Smith <b.j.smith＠ieee.org> 17 Apr '05

17 Apr '05

From: Harald Finnï¿½s <spamcatcher(a)lantrix.no> > If memory serves, I had the worst performance on aa 7506-8 running R5 and > MDK 10.1. Write performance was extremenly slow, so the box would use all > memory for cache almost immidiately. This resulted in very high CPU, and > the machine became unresponsive. After applying: > sysctl -w "vm.bdflush=0 500 0 0 500 3000 0 20 0" > it was back to normal. This works with 2.4 kernels only. Correct, because the Linux kernel is tuned to assume the storage does NOT provide I/O queuing. As I stated in another e-mail, the Linux kernel does async I/O by default. Some cards, like the 3Ware, try to sync I/O as best as it can for safety. This hurts performance quite a bit -- especially on the 9000 series. The 9000 series now introduces DRAM, and by default, isn't battery backed on the 9000 (the kits just became available), hence the defaults that are very "sync-like." I _highly_recommend_ you change those defaults (and get the kit too). All prior 3Ware cards are SRAM-only, which does not require an external battery source. DRAM is a leaky cell that uses 100x+ the power of SRAM, which is a complex, combinational circuit. That's why prior 3Ware cards didn't need external battery, they use SRAM. You can typically cycle power and the 3Ware write cache will be flushed (at least on the 7000/8000 series). > With 2.6 this improves performance: > blockdev --setra 16384 /dev/sda > I'm pretty sure I found both these setting in the 3ware knowledgebase. So many people don't hit the 3Ware knowledge base. You should *ALWAYS* hit the knowledge base of your intelligent card vendor. Remember, the Linux kernel is tuned to assume storage controllers unintelligent and have *0* I/O queuing capability. Hence why LVM/MD is "tuned out of the box" with Linux. Furthermore, the SCSI-2 protocol provides standard command-sets for I/O queuing for SCSI cards, as well as Intel's I2O (dpt_i2o). But when you have a "generic" SCSI block driver, like with 3Ware and many others (including the DAC_960 for a few older Mylex cards), you need to tell the kernel's VM and block interface how to best stages writes and other operations. -- Bryan J. Smith mailto:b.j.smith@ieee.org

1 0

Re: [CentOS] Serial ATA hardware raid.
by Bryan J. Smith <b.j.smith＠ieee.org> 17 Apr '05

17 Apr '05

From: Les Mikesell <lesmikesell(a)gmail.com> > Note that software mirroring has some advantages too and is not > a big performance hit as long as the underlying hardware uses > DMA and works independently (i.e. don't do it with drives > on the same IDE controller cable). Actually, I wouldn't do it on the same PCI bus. With drives able to burst at 50MBps, the amount of traffic on your interconnect can actually be high. > I consider it a big plus to be able to take a drive from a mirrored pair, plug > it into just about any computer without worrying about having > exactly the same brand of controller, and recover the data - or > take over the service the broken computer was providing. Then you'll like 3Ware. For RAID-1, it doesn't change the organization. But even if you use RAID-0, 0+1 and RAID-5, the great thing about 3Ware is you _can_ safely move the drives to _any_ model card, as long as the firmware is at least the same or newer. I have done this with volumes from 5000 to 6000 or 7000, 6000 to 7000. > And by the way, there's nothing wrong with running a DNS server > and mail server on the same machine - but you should have a 2nd > dns server which can also provide other services. A secondary mail server is always a good idea too. Ideally, you should consider a chroot environment or even an UML instance for each. > You might need a bit more RAM but DNS typically is not a big cpu load. But you are correct from a load standpoint, neither will hit you too much. -- Bryan J. Smith mailto:b.j.smith@ieee.org

1 0

CentOS4 ok on Dell cerc sata raid ?
by Francois Caen 17 Apr '05

17 Apr '05

Hello, There's been a lot of talk lately about raid controllers :-) I'm thinking about buying a Dell Poweredge with the Dell CERC SATA RAID Controller, 64MB Cache. It'll be either a P4 or a 64bit Xeon. Does CentOS4 recognize these controllers fine? Any extra driver needs to be installed? Thanks, Francois

3 3

Test kernel for a certain feature
by Mário Gamito 16 Apr '05

16 Apr '05

Hi, Is there a command one can issue to check if the kernel supports a certain feature ? Let's say, for instance, Appletalk, or NTFS. Whatever... Warm Regards, Mário Gamito

2 1

Serial ATA hardware raid.
by Franki 16 Apr '05

16 Apr '05

Hi everyone, I'm looking into setting up a SATA hardware raid, probably 5 to use with CentOS 4. I chose hardware raid over software mostly because I like the fact that the raid is transparent to the OS. Does anyone know of any SATA controllers that are well tested for this sort of usage? From what I can tell from googling, this is more or less where RHEL stands: Red Hat Enterprise Linux version 3 and the current version of Fedora support the following SATA chipsets: Intel's ICH5 SATA chipset Silicon Image's SATA chipset Does CentOS4 add anything to this as it is based on 2.6 kernel? My question upon reading what I found on Google, is if it is true hardware raid, shouldn't the OS not be able to tell it's raid at all? I'm assuming that the chipsets listed above are driver based hardware raid? what I am after is a raid array based on true hardware raid such that the OS see's just one drive, and the hardware firmware handles any mirror/striping. Any suggestions? regards Franki

10 13

Re: [CentOS] Serial ATA hardware raid.
by Bryan J. Smith 16 Apr '05

16 Apr '05

From: Franki > After abit of searching, > I found a 4 port 8506 for retail $480 here: BTW, when I was estimating prices earlier, I was using US$. > For the record, this machine is to replace a web server with about 60+ domains hosted, I've been maintaining Linux DNS/SMTP servers since just before Apache surfaced, adding CERN httpd and the "patchy." But the majority of my Linux deployment has been for file servers - especially NFS as of 1999. I still prefer Fujitsu SPARC/Solaris and, even more so, NetApp filers as NFS/SMB plarforms, but throwing around TBph is typical. > some of which get allot of hits, > most are dynamic (Perl/PHP/Java) and the > server runs local MySQL/PostgreSQL as well. I feel very strongly about using RAID-0+1 in this configuration if you can afford to reduce your effective storage by 33% over RAID-5. But the choice is yours. You're not going to make a massive hit since CPU and network is more important. But you should still segment network and storage with an AMD8131 HyperTransport tunnel that provides seperate PCI-X channels for each. And don't skimp on the NIC - get something with at least 256KB SRAM receive cache. > I don't think speed is as important as redundancy, RAID-0+1 means you could possibly lose 2 discs and be okay, although there's no guarantee after losing 1. The other thing 3Ware does is read interleaving between the two mirrors. > but having said that, for future proofing, > I'd like to get a good performer as well. 3Ware's ASIC compared to a Microcontroller is like comparing a layer-2 ASIC+SRAM switch to a PC CPU+DRAM that does switching/routing. The ASIC can do it much faster, although the PC can buffer more. So it depends if you're just throwing data around like layer-2 switching (switching RAID-0, 1, 0+1 reads/writes), or if you are calculating dynamic routes in non-real-time (like RAID-5 XORs for parity). That's why 3Ware calls it a "storage switch." Of course if you have a 9500, it has DRAM too, so it's like having a layer-3 switch (that can route too). And without the inefficiency of the PC interconnect. > Which brings up another question, > I was looking at populating this thing > with 10,000 RPM 8MB cache 40gig (roughly) drives, > but the only drives I see in my pricelists that > match those specs are Western Digital Wd360GB's > and I generally have stayed away from WD drives in the > past due to dodgy standards implimentation > and the problems that can cause with Linux, First, other than Maxtor, Seagate and Hitachi, no one makes their own drives. WD taps the first and last for many, and Maxtor's approch is different than Seagate and Hitachi (I'll send you a link to any explaination). Secondly, the ATA drives *never* talk to the system, only the 3Ware ASIC. And unlike GPL Linux, 3Ware can get proprietary command set info from vendors. I have *never* had a "DMA timeout" in the history of my 6-year 3Ware usage. > should I continue to stay away? WD's 10,000rpm drives come off the same "enterprise" line as Hitachi's SCSI/SATA. They are not commodity at all. Hitachi and Seagate have dedicated "enterprise" lines for some SCSI/SATA, and then "commodity" lines for SCSI/SATA/ATA. Maxtor has only one line and then tests for tolerance and those that rate high are then declared "enterprise" with a 3-5 year warranty. > Actually, now that I think about it, > I guess 10,000 rpm drives with raid is probably over kill for my usage, Actually, since you are more concerned with latency in your application, then a faster spindle is better. In reality, the higher the density, typically the higher the DTR. So it is very common to see lower density or 1-gen back of higher spindles have a *lower* DTR than a lower spindle. > but they are pretty cheap anyway, (149 AUD each) but > if WD are still dodgy I have WD 40, 80 and 160 "consumer" ATA/SATA drives that give some chipsets fits under Linux, but 0 issues on a 3Ware card. > then I'd probably go for 7200rpm seagates > as I can get the 8MB 80gig 7200rpm drives for $85 AUD. Seagate is the only manufacture giving 3-5 year warranties on their "consumer" drives instead of 1-3. Yes, they cost 10-20% more than Maxtor/WD, but that's piece-of-mind IMHO. The "sweet spot" right now seems to be 200GB (160-250GB) for size, density (DTR performance) and price (sub-US$100). (4) 200GB = 400GB effective RAID-0+1. > Are Western Digitals still dodgy? All "integrated drive electronics" (IDE) drives via Advanced Technology (AT) Attachment (ATA) seem to do a poor job of following ATA-5 and ATA-6 specs. But with 3Ware, I've yet to have an issue. I even have 80GB WDs on old 3Ware 6000 series cards with 3-year-old firmware 6.9 that don't have an issue. BTW, 40C is the maximum ambient temperature a "consumer" SCSI/SATA/ATA drive should be exposed to. Drive life dives off if they run hotter. So consider getting a hot-swap enlosure that fits in a 3x5.25" bay that has 5 bays. They run $150.

2 2

CentOS4 Loop at shutdown
by Collins Richey 16 Apr '05

16 Apr '05

Has anyone else encountered a loop and failure to shutdown on CentOS4? This has occurred twice in the past month, but unfortunately I failed to write down the looping messages. The only relevant problems I found via Google reference raid controllers, and I have POI (plain ol' IDE). Doh! Obviously I wuill need to record the errors. My environment is run-level 5 with GDM, but I use IceWm instead of one of the more common choices. IceWm shuts down cleanly. The loop occurs after selecting Shutdown from the GDM login panel. Errata are current as of last night. -- Collins When I saw the Iraqi people voting three weeks ago, 8 million of them, it was the start of a new Arab world.... The Berlin Wall has fallen. - Lebanese Druze leader Walid Jumblatt

2 2

Document Management System
by Joao Medeiros 16 Apr '05

16 Apr '05

Hi all, I was wondering if someone can give me some pointers to a good Document Management System. I've been using Knowledge Tree for a while and just wondering if there is something a bit more robust. I'm archiving technical specs, functional documents, etc... TIA, Joao João Medeiros Linux User 381318

6 7

RE: Older 3ware controller, was: [CentOS] Serial ATA hardware raid.
by Bryan J. Smith 15 Apr '05

15 Apr '05

From: Harald Finnås > You seem to know what you're talking about, Seems v. Knows is a whole new ballgame. But I have been deploying SCSI on Linux since 1993 (Advansys, now owned by LSI, was the first vendor to formally support Linux), SCSI RAID on Linux since 1997 (large ICP-Vortex), through 3Ware's original FPGA ASIC designs in the AccelATA and Escalade 5000 series in 1999+. For a more "concept-level" dissertation on: - Software RAID via OS LDM/LVM - Fake/Free RAID (FRAID) "dumb cards" - Buffering Microcontroller+DRAM intelligent cards - Non-blocking ASIC+SRAM intelligent cards see my article "Dissecting ATA RAID Options in Sys Admin magazine (http://www.samag.com) 2004 April. It's now dated, but the concepts still apply. > One of my friends called me the other day regarding problems with centos > installation on 3ware 7810-8 controller. I have several of that, same model -- 64-bit, 1MB SRAM > According to him the driver loads just fine, he can see AND partition the drive from the console, > but the installation program doesn't seem to want to use the array. The system doesn't dual-boot with Windows, does it? If so, it could be a LDM Disk Label (Dynamic Disc) which kernel 2.4.x supports, but Red Hat Anaconda (which uses GNU Parted/GRUB) does not. Also, consider upgrading to the latest firmware. If you're booting RH3+ (RHL8/9/FC1, RHEL3), you should be at least release 7.7.x. Otherwise there might be driver-firmware interaction issues. > He says it works like a charm on > mdk 9.2 beta. > Any tips? Boot with "linux expert" and hit Alt-F2 and run "fdisk -l /dev/sda". > I haven't looked into the problem yet, > and I don't even know what this old controller is. :) _All_ Escalade 7000/8000 series controllers use the same 64-bit ASIC, FPGA (field programmable) ATA logic and firmware. This includes a 7.5 (was it?) release that added LBA48 (ATA-6) addressing and UDMA Mode 6 (U133) speed support. Again., getting to 7.7.x should be a top priority - the RH3 and, especially, RH4 kernels have drivers that match these much newer 3Ware firmware-driver-3DM releaases. FYI: For reference: 7400/7800 = 33PCI64 full-length, 64-bit ASIC, 1MB SRAM, 4/8 channel 7410/7810 = as 7400/7800 but *half*-length 7450/7850 = as 7410/7810 but *2MB* 0 wait state SRAM 7500-4/8 = 7450/7850 merely renamed 7500-12 = as 7500-4/8, but with *4MB* SRAM and 12 channels 7506-x = as 7500-x, but 66PCI64 interface (ASIC clock doubled)

1 0

Re: [CentOS] Serial ATA hardware raid.
by Franki 15 Apr '05

15 Apr '05

Jonathan wrote: > Franki: > > Can't speak for all of them, but the IDE 160s I bought failed me pretty > hard (2 of 6 failed within a year). The 250s Sata 8ms I bought for a > NAS application have been rock solid. > > Seems inconsistent, but in general the WD Sata drives I have are pretty > solid. > > Jonathan I don't understand, aren't they more or less the same drive with a different PCB on the back? I'm just remembering all the problems I had several years back when I was running RH4-6.2 on WD drives. I would imagine that with striping, the 8MB 7200 drives would be good enough, and besides, it's not like I can't upgrade later. The 10,000rpm drives have me alittle worried about heat and longevity anyway. Thanks for all your help guys, I'm amazed at the wealth of knowledge on this list. regards Frank

1 0

Re: [CentOS] Serial ATA hardware raid.
by Bryan J. Smith 15 Apr '05

15 Apr '05

From: Franki > The 3ware 9500 goes for $1023 AUD. > once I add some fast drives to that this thing is starting to look like an expensive upgrade. RAID-5 is only ideal for lots of contiguous reads or disk storage efficiency. If you have more writes, or more random reads, then RAID-0+1 is better. Then the 8506 does nice for less. > My main wholesaler sells Adaptec stuff, I live 5 miles from one of Adaptec's major support centers in the 1,006 acre University of Central Florida Research Park. I know many Adaptec employees. Adaptec still does not officially support Linux for RAID cards, only standard SCSI adapters. And unlike LSI/Symbios, who treats OEM and retail the same (making suppor easier), Adaptec is retail focused, and produces variants for OEMs that are quite compatibility nightmares. > http://www.techbuy.com.au/products/34526/I_OCARDS_HARDDRIVECONTROLLERS/Adda… > For $450 it is a 4 port controller and has onboard 64MB ECC cache. Adaptec's aging 2400A/2800A series are 66-100MHz i960/IOP30x series based on their former DPT acquisition. In fact, before their DPT acquisition, they had virtually *no* i960 or StrongARM solution that worked with Linux. Since then, the support has been varied, although the dpt_i2o driver seems to work with most products. Intel designed I20 for its i960 to make drivers and user-space software more uniform compatible, but only a few vendors (like DPT and LSI) took advantage of it. I used to have DPT and LSI i960 SCSI RAID controllers on Linux, NT, OpenVMS and UNIX on a variety of non-PC platforms like Alpha and MIPS. But, as I mentioned before, the i960/IOP30x is a *massive*slouche* for today's drives. The ones used in the 2400A/2800A series were fine 5 years ago, but don't even bother with the 28x0 and the 24x0's i960 is going to be the bottleneck. And then you have the fact that Adaptec is "hands-off," officially, on the dpt_i2o driver. Get a 3Ware Escalade 8506-4 for about the same price, and either run RAID-5 if you have lots of reads, or RAID-0+1 if you are doing lots of writes (especially random). Yeah, you'll lose a disk in the effective storage for RAID-0+1, but I've yet to see an application where RAID-5 could beat RAID-0+1 on any controller. > But Alexander on the list here said that adaptec is questionable > for Raid cards. The last time I had an Adaptec anything was a 2940UW Scsi controller > and that thing gave me years of good service. Retail, of course. For those of us with OEM versions, Linux compatibility is a nightmare. Why can't Adaptec be like LSI and just have one set of firmware? > Not sure what to chase up now. :-( > Does anyone have any experiance with the above adaptec card? Yes. At RAID-5, it only beats the Escalade 8506 at random writes where the measly 2-4MB SRAM oveflows. But then the Escalade 9500S with 128MB+ of DRAM buffer (in addition to the ASIC+SRAM cache) wipes the floor with it because it doesn't have a 10 year-old i960 behind it. When it comes to non-writes (or RAID-0, 1 or 0+1 non-blocking), its 32-bit blocking/buffering i960 microcontroller+DRAM bottleneck looses badly to the 64-bit non-blocking/caching ASIC+SRAM design of any 3Ware product. And 3Ware writes the GPL drivers in the kernel, which have been included since 2.2.15 (yes, 2.*2*.15). 3Ware's 3DM2 suite is also very nice for user-space monitoring. And yes, you can load 3DM2 from the 9500S download on the older 7000/8000 series (just not the 6000 series). BTW, performance matters *little* if you are putting your storage controller on the same bus as your NIC. Especially if it's a measly, "shared" 33MHz PCI32 bus. You might as well use 2 hard drives in RAID-1 because you're going to saturate it - let alone your GbE is going to be "fighting" it. Get a mainbaord with PCI-X, or at least get a chipset with the GbE on a HyperTransport interconnect or PCIe x1 rail so it's not fighting the storage controller for the PCI bus. Of course most chipset GbE and 99% of GbE cards are poorly designed (8-32KB of SRAM is typical, 64KB is you are lucky), and one should get a GbE card for a server with at least 256KB SRAM.

2 1

Re: [CentOS] Serial ATA hardware raid.
by Bryan J. Smith 15 Apr '05

15 Apr '05

From: Harald Finnås > 3ware (7500, 8500, 9500) is IMHO best bet on all distros 3Ware includes a GPL driver in the stock kernel. Although as with any "intelligent" storage adapter, you should verify the driver, firmware and user-space tools are compatible. I need to get my FAQ out showing 3Ware releases v. Red Hat updates. The 3Ware 7506/8506 are of the same 64-bit ASIC 66MHz PCI64 storage switch. They are non-blocking (like a network switch) thanx to their ASIC+SRAM (static RAM) design and kill at RAID-0, 1 and 0+1. While they are also high performing at RAID-5 reads, the small amount of 2MB (-4, -8) or 4MB (-12) SRAM can overflow on random, RAID-5 writes. The 3Ware 9500S series adds 128MB+ SDRAM to help buffer these overflows. Unlike RAID-0, 1 and 0+1, RAID-3/4/5 are always blocking/buffered I/O, so the ASIC+SRAM design goes from an advantage to a liability. So if your application calls for lots of random writes, either use RAID-0+1 or get a 9500S for $50-200 more. > I also run it on an LSI SATA controller, > but I cannot remember the exact model. > But I can find it if you want to know. :) Unless the model says "X" (for XScale), you don't want it. Pre-XScale (StrongARM lineage) microcontroller+DRAM designs are *dog*slow*. Intel i960 (including IOP30x series) can't push much beyond 60-70MBps. While that was sufficient for yester-year's drives in RAID-3/4/5, it is not today. And blocking/buffered is never ideal for ATA. The StrongARM and, subsequent, superscalar XScale microcontrollers change everything. They can push as little as 200MBps in old designs up to 500MBps in the new IOP32x/33x series. But you'll pay through the nose for the cards, $500+, although they do best even the 3Ware 9500S at RAID-5. Some have RAID-3/4 options that are more ideal than RAID-5 for desktops and NFS servers, respectively. But if you are looking for maximum performance, reliability and compatibility as well as load-balanced reads, RAID-0+1 on a sub-$300 3Ware Escalade 8506-4 (or a -8 for a little more) is pretty much unbeatable. The 9500S is overkill for just RAID-0+1, and if you're doing lots of writes, it's typically going to be faster than any RAID-5 solution. For extreme performance with disk redundancy, consider (2) 3Ware 8506 cards in an Opteron system with an AMD8131 or AMD8132 dual-PCI-X bus HyperTransport Tunnel -- with each card on their own PCI-X bus and then their individual RAID-0+1 volumes in a single LVM2 stripe set (RAID-0). Connected to a GbE in the HyperTransport interconnect or, better yet, a HTX (HyperTransport) 10GbE (just coming out) or InfiniBand (upto 1.8GBps actual performance on HTX) and you're slapping silly anything Intel can offer with either Xeon or Itanium over PCI-X by a factor of 2-3x.

2 2

PHP5?
by Håvard Hebnes 15 Apr '05

15 Apr '05

Any ideas if or when PHP5 will be released? Do you think RH will release it to CentOS-4, or do we have to wait for the next major release? Noticed that PHP-5.0.4 is in the fedora-4 beta release.. Regards, Håvard

4 3

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

Discuss