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Re: [CentOS] slow NFS speed
by Ross S. W. Walker 30 Jul '08

30 Jul '08

70-80MB/s is good for NFS/CIFS networking given the 4k block size and network latency. It's not the MB/s driven by your storage system that get you it's the IOPS throttled by the network latency and two-way communication over it. -Ross ----- Original Message ----- From: centos-bounces(a)centos.org <centos-bounces(a)centos.org> To: CentOS mailing list <centos(a)centos.org> Sent: Tue Jul 29 23:20:10 2008 Subject: [CentOS] slow NFS speed We upgraded from a 10/100Mbs to a 2 100/1000 bonding. We notice the speeds of NFS to be around 70-80Mb/sec. Which is slow, especially with bonding. I was wondering if we need to tune anything special with the Network and NFS. Does anyone have any experience with this? TIA _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof.

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Logrotate Problem
by Balaji 30 Jul '08

30 Jul '08

Dear All, Currently i am using CentOS 4.4 Linux I have configured crontab to run cron.daily at 4:02 am 2 4 * * * root run-parts /etc/cron.daily On 4:02 am my pc is shutdown and i am boot-up my pc on 13:11:10 Please verify the system log messages from "/var/log/messages" file Jul 30 13:11:10 localhost syslogd 1.4.1: restart (remote reception). Jul 30 13:11:10 localhost snmpd[2663]: Received TERM or STOP signal... shutting down... Jul 30 13:11:11 localhost snmpd: snmpd shutdown succeeded Jul 30 13:11:11 localhost snmpd: snmpd startup succeeded Jul 30 13:11:12 localhost syslogd 1.4.1: restart (remote reception). Jul 30 13:11:12 localhost logrotate: ALERT exited abnormally with [1] But Logrotate will be done after PC is boot-up Please verify the logrotate messages from "/var/spool/mail/root" file From root@localhost Wed Jul 30 13:15:07 2008 Return-Path: <root@localhost> Received: from localhost (localhost.localdomain [127.0.0.1]) by localhost (8.13.1/8.13.1) with ESMTP id m6U7j7ll012654 for <root@localhost>; Wed, 30 Jul 2008 13:15:07 +0530 Received: (from root@localhost) by localhost (8.13.1/8.13.1/Submit) id m6U7j7xn012641 for root; Wed, 30 Jul 2008 13:15:07 +0530 Date: Wed, 30 Jul 2008 13:15:07 +0530 Message-Id: <200807300745.m6U7j7xn012641@localhost> From: root@localhost (Anacron) To: root@localhost Content-Type: text/plain; charset="ANSI_X3.4-1968" Subject: Anacron job 'cron.daily' /etc/cron.daily/logrotate: I am not sure why this is happening. Can some one throw light on this. Regards -S.Balaji

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Re: [CentOS] You didn't give me some packages, so now I'm giving you some! R, TexLive, LyX, Gnumeric, etc.
by Paul Johnson 30 Jul '08

30 Jul '08

On Mon, Jul 28, 2008 at 6:39 AM, Brent L. Bates <blbates(a)vigyan.com> wrote: > You might want to check out Scientific Linux: > > https://www.scientificlinux.org/ > > They include a number of things that CentOS doesn't, like `R'. I don't know > if or how many of the other items you are looking for are on their site. Just > check them out for yourself. They seem to try to be more up to date on some > things than CentOS. I hope this helps some. > I tried Scientific Linux and found I had to re-build the same things that I rebuild for CentOS, including R, because their versions lagged behind the cutting edge. I switched to Centos hoping that the larger user community would generate more contributions of updated packages for other things, like gnumeric or such. So far, that's not panning out, but I still have hope. I am trying to find my way into the rpmforge rpmrepo or rpmfusion or whatever it will be called. You can compare the stuff I had to build with it http://pj.freefaculty.org/ScientificLinux/5/i386/kups/packages/ and it is basically the same stuff I had to build for Centos: http://pj.freefaculty.org/Centos/i386/kups/packages/ For Scientific Linux, I even had to build Firefox, which required rebuilding yelp. Maybe people will find this thread and suggest I try the Debian off-shoots, like Ubuntu or Mint. I've been doing that too. I'm running Ubuntu on my laptop and it is closer to what I need than Fedora or CentOS. It has a slower-changing kernel than Fedora, but more up-to-date applications than Centos. However,I am not installing it in our labs or on public machines because I find it harder to secure. On a workstation that I use personally, it is OK. For someone making the switch from Windows to Linux, Ubuntu may be the preferred option. But in a lab or on a widespread basis, there are some things that hold me back. 1. The basic install of Ubuntu is less security conscious. There's no firewall in the default installation. (That is justified on the grounds that no public services are offered in the default configuration. The default iptables framework allows everything. However, users can easily install services, without realizing that there is no firewall.) It doesn't (by default) secure the bootloader with a password. I noticed that default users have more privilidges in Ubuntu than Fedora (they can use fuse file system). Without having a comprehensive knowledge of Ubuntu, I'm not sure how many other "gotchas" are waiting. Maybe I've not found the CentOS gotchas yet. 2. It includes too many invitations to ordinary users to add/remove packages. If somebody tries to run something that is not installed, the shell replies "you can install that if you type sudo apt-get install xyz". They can't do that, they don't have privileges. The Applications menu has an add/remove package program. I don't want users to be asked to do things for which they don't have privileges. The whole design of the package manager is to not be automatic, but ask for constant user intervention. Not good with many machines. 3. I do not have as much faith in the deb packaging process. For me, this the biggest reason I'm hanging around in the RPM distributions. I learned RPM building from the classic Maximum RPM, which is emphatic about keeping the 'pristine source code.' If you have never built a Debian package, you will will be in for a surprise. You can't even build a Deb package unless you manually untar the source code and create a directory inside it. My experience is that it is much harder to rebuild a debian package than it is to rebuild an SRPM. Most of the time, if you find an SRPM and you want to build it on your system, it is as simple as "rpmbuild --rebuild whatever.src.rpm". I can't find anything comparable to that for Debian. It is always necessary to open up the source package. -- Paul E. Johnson Professor, Political Science 1541 Lilac Lane, Room 504 University of Kansas

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smartd on RAID controllers?
by Kai Schaetzl 30 Jul '08

30 Jul '08

It seems I can't smarm monitor disks on RAID controllers? I tried on several machines with two different controllers and on all I get this when starting up smartd: Jul 27 14:36:43 c1 smartd[5944]: Opened configuration file /etc/smartd.conf Jul 27 14:36:43 c1 smartd[5944]: Configuration file /etc/smartd.conf parsed. Jul 27 14:36:43 c1 smartd[5944]: Device: /dev/sda, opened Jul 27 14:36:43 c1 smartd[5944]: Device: /dev/sda, Bad IEC (SMART) mode page, err=4, skip device Jul 27 14:36:43 c1 smartd[5944]: Unable to register SCSI device /dev/sda at line 32 of file /etc/smartd.conf Jul 27 14:36:43 c1 smartd[5944]: Device /dev/sda not available /dev/sda is the virtual disk as it appears to CentOS as I can access it with hdparm. Do I need to use another device for the RAID array (which?) or is it impossible to smart monitor "thru" a RAID controller? Kai -- Kai Schätzl, Berlin, Germany Get your web at Conactive Internet Services: http://www.conactive.com

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Shell script - ping
by Gopinath Achari 30 Jul '08

30 Jul '08

hi, how to write a scripts which launches 10 pings to different destinations at execution of single shell scripts please help me any ideas regards, Gopinath

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way OT: CCNA Router Sim
by Ed Donahue 30 Jul '08

30 Jul '08

I know this is completely off topic, but I was wondering if anyone could suggest a good network/router simulator. I don't want to spend $80 on CCNA CertSim unless I have to.

2 1

syslog question
by James Pifer 30 Jul '08

30 Jul '08

I have a 64bit centos 5.2 system. My router supports sending logs to a syslog server, so I was hoping to send them to my centos box so they are easier to keep an eye on. I've been googling for howto's etc, but I didn't think syslog would be that difficult. Do I need to use syslog-ng or can I use the syslog that's installed with centos 5.2? Any suggestions or guidance? Thanks, James

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Extended characters not working on CentOS
by MHR 30 Jul '08

30 Jul '08

A friend of mine here at work pointed me at this web page www.fhlcell.org where there are a lot of Chinese characters on the page. Interestingly enough, on my CentOS 5.2 system, with both Seamoneky 1.1.11 and Firefox 3.0, we were unable to get the characters to display properly (they showed up as the little four number boxes instead). However, on his Ubuntu system, using Firefox, they displayed just fine. Also, I just tested it in Win XP and both Seamonkey 1.1.11 and IE display it correctly. What's going on? mhr

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X-Windows Login
by Al Sparks 30 Jul '08

30 Jul '08

I have a server with all the x-windows stuff installed. But it's giving me a text based login prompt on the console. I can log onto the console, and run gnome-session and GNOME comes up fine. How do I turn it on so that I get a X-Window GUI login prompt? === Al

2 1

Duplicate PV on HW RAID?
by Eduardo Grosclaude 29 Jul '08

29 Jul '08

Hello, My "hardware" (?) RAID system seems to work but says "duplicate PV" while booting, I don't think I was reading them before. Any clues will be appreciated. >From what I recall: 1) RAID 1 was setup (using firmware setup program) on a machine with Intel S3200 SHV Server Board. 2) Installed Centos 5.1, default LVM style. Anaconda saw a single 500GB disk so I assumed this was a true hardware RAID system. Am I wrong here? 3) Then wanted to reduce LogVol00 so as to make room for a new, data only filesystem on its own LV. Started by booting with rescue CD, lvscanned the disk, lvchanged -a y. Intended to resize root filesystem with resize2fs. Was asked to fsck, which I did (by the way, getting many errors). Fixed them all (fingers crossed), fsck again said ok. Then resize2fs worked happily. 4) Rebooted the installed system. Now "Duplicate PV" shows at boot. Honestly I don't know whether this was being displayed before (this is an inherited server). This message shows at the screen but no record of it is kept on any log file. 5) Everything seems to work well anyway. I created a new LV as I wished, just this message keeps me thinking... Should I care? Should I fix it? Is it a true RAID board? Should I be better off going software-RAID 1? lspci says 00:00.0 Host bridge: Intel Corporation Server DRAM Controller 00:1a.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 02) 00:1a.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 02) 00:1a.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 02) 00:1a.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 02) 00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 02) 00:1c.4 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 5 (rev 02) 00:1d.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 02) 00:1d.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 02) 00:1d.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 02) 00:1d.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 02) 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 92) 00:1f.0 ISA bridge: Intel Corporation 82801IR (ICH9R) LPC Interface Controller (rev 02) 00:1f.2 RAID bus controller: Intel Corporation 82801 SATA RAID Controller (rev 02) 00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 02) 02:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G200e [Pilot] ServerEngines (SEP1) (rev 02) 03:01.0 Ethernet controller: Intel Corporation 82541PI Gigabit Ethernet Controller (rev 05) 03:02.0 Ethernet controller: Intel Corporation 82541GI Gigabit Ethernet Controller (rev 05) Thank you in advance -- Eduardo Grosclaude Universidad Nacional del Comahue Neuquen, Argentina

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