Discuss January 2007

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264 discussions

Re: [CentOS] Cluster with two i386 pcs!
by israel.garcia＠cimex.com.cu 19 Jan '07

19 Jan '07

>> John, thanks for your answer, I think I'm looking for a hihg performance >> cluster with two pcs... Apache, Mailscanner/Postfix, mysqld and squid >> are going to run in this cluster.. >> >Each of those apps has its own requirements for a shared workload <cluster. frankly, I have no idea how a squid cluster could or would work. >webservers like apache are most frequently clustered by being put behind >a load balancing router such as BigIP from F5. this is $$$$$$. >mysql has its own clustering support, I'm not very familiar with it. >typically, these require shared storage. >not sure why you'd need to cluster a mail server other than high >availability, this typically requires shared storage for the spool files >and such. >I have no idea how you'd loadbalance cluster a squid cacheing proxy >between two systems with discrete SATA drives. maybe if the squid cache >was stored on a NFS server? >frankly, with that workload, and the hardware resources you described, >you'd probably get the best performance by balancing the applications >across the two systems. whichever app requires the most resource, put >it on one, put the rest on the other. if the 'other' is overloaded, >move another task to the first. John, I'm reading now some stuff of clustering from internet, thanks for your opinion, let me ask you, (maybe a stupid question), which are the common applications used on cluster's systems? Web? Regards, Israel

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CentOS-announce Digest, Vol 23, Issue 5
by centos-announce-request＠centos.org 19 Jan '07

19 Jan '07

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-2007:0013-01: Moderate CentOS 2 i386 kernel security update (John Newbigin) ---------------------------------------------------------------------- Message: 1 Date: Fri, 19 Jan 2007 14:58:19 +1100 From: John Newbigin <jnewbigin(a)ict.swin.edu.au> Subject: [CentOS-announce] CESA-2007:0013-01: Moderate CentOS 2 i386 kernel security update To: centos-announce(a)centos.org Message-ID: <45B041DB.5030908(a)ict.swin.edu.au> Content-Type: text/plain; charset=us-ascii; format=flowed The following errata for CentOS-2 have been built and uploaded to the centos mirror: RHSA-2007:0013-01 Moderate: kernel security update Files available: kernel-BOOT-2.4.9-e.71.i386.rpm kernel-doc-2.4.9-e.71.i386.rpm kernel-headers-2.4.9-e.71.i386.rpm kernel-source-2.4.9-e.71.i386.rpm kernel-2.4.9-e.71.i686.rpm kernel-debug-2.4.9-e.71.i686.rpm kernel-enterprise-2.4.9-e.71.i686.rpm kernel-smp-2.4.9-e.71.i686.rpm kernel-summit-2.4.9-e.71.i686.rpm kernel-2.4.9-e.71.athlon.rpm kernel-smp-2.4.9-e.71.athlon.rpm More details are available from the RedHat web site at https://rhn.redhat.com/errata/rh21as-errata.html The easy way to make sure you are up to date with all the latest patches is to run: # yum update -- John Newbigin Computer Systems Officer Faculty of Information and Communication Technologies Swinburne University of Technology Melbourne, Australia http://www.ict.swin.edu.au/staff/jnewbigin ------------------------------ _______________________________________________ CentOS-announce mailing list CentOS-announce(a)centos.org http://lists.centos.org/mailman/listinfo/centos-announce End of CentOS-announce Digest, Vol 23, Issue 5 **********************************************

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Re: [CentOS] Cluster with two i386 pcs!
by israel.garcia＠cimex.com.cu 19 Jan '07

19 Jan '07

israel.garcia at cimex.com.cu <http://lists.centos.org/mailman/listinfo/centos> wrote: >> I want to make a cluster with two simple (INTEL SATA) pcs using CentOS, >> my question is? Is there something easiest than Linux RedHat Cluster >> Manager to make a cluster using CentOS with just two pcs? >> >do you want a high availability cluster, or a high performance >cluster? the two are completely different. >what application(s) is this cluster serving? John, thanks for your answer, I think I'm looking for a hihg performance cluster with two pcs... Apache, Mailscanner/Postfix, mysqld and squid are going to run in this cluster.. Regards, Israel

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modules.cgz
by Denis Machard 19 Jan '07

19 Jan '07

I would like to add a driver (bcm5700.ko) in modules.cgz. but there are several files modules.cgz . In which files I do have to add the drivers: - initrd.img ? - stage2.img ? - netstg2.img ? - hdstg2.img ? Denis

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i8042_panic_blink conflict with legacy interrupt from devices.
by vishal vishal 19 Jan '07

19 Jan '07

hi, my PCI-Express device is generating interrupts at a very high rate. when i generate legacy interrupts the system hangs saying "Badness in i8042_panic_blink in drivers/input/serio/i8042.c:992" but when i generate the interrupts using the MSI mode. the system is working fine. please help --------------------------------- Heres a new way to find what you're looking for - Yahoo! Answers

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MySQL admin GUI
by Jordi Espasa Clofent 19 Jan '07

19 Jan '07

Hi all, I'm looking for a mysql admin GUI tool. Currently I use [root@correo ~]# rpm -qi mysql | grep Version Version : 4.1.20 Vendor: CentOS and phpMyAdmin. I've seen the MySQL Administrator GUI tool proovided by MySQL AB is only available for MySQL 5.x series, and there is not CentOS package anyway (yum list *mysql* don't shows any MySQL admin GUI available). ¿What MySQL admin GUIs have we currently?

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Re: [CentOS] Why slapd dying?
by Jun Salen 19 Jan '07

19 Jan '07

Thanks Johnny. My Slapd are now running after start thru service start command. One of the reason why the daemon is dying before is that the dbd database was corrupted probably by sudden power off due to lose power socket connection. I follow your advise and now enable logging thru it. Thanks again and more power to you and to Matt. ------------------------- On Wed, 2007-01-17 at 20:02 -0500, Matt Hyclak wrote: > On Thu, Jan 18, 2007 at 12:46:34AM +0000, Jun Salen enlightened us: > > I am wondering why slapd in my CentOS 4.4s erver was > > unable to run. I already configure ldap to start at > > boot and when I issue command /sbin/service ldap start > > it is sucessfully started but again when I check the > > status etheir thru service or by netstat, it was > > stopped and not exist respectively. Is anybody > > encountered this. If you need some more info > > just let me know. Thanks. > > > > I ran into this after restoring the ldap database files from a backup > (/var/lib/ldap). You can create /etc/sysconfig/ldap and in it put something > like: > > SLAPD_OPTIONS="-d XXX" > > and restart ldap. Man the slapd manpage for all the options. If it is a > corrupted database, you might look at the various db_* commands, such as > db_recover. Googling for any error messages you get will help, too. You can also turn on logging for slapd to figure out want is going on ... 1. add this line to /etc/syslog.conf local4.* /var/log/ldap.log 2. add this line to /etc/openldap/slapd.conf loglevel 256 (there are numerous levels ... see the below link and search the page for loglevel) http://www.openldap.org/doc/admin22/slapdconfig.html set the loglevel back to a valid value (I use 0) when finished debuging based on the above link. 3. add this to /etc/logrotate.d/syslog (somewhere in the log names line for syslog {that is the first line}, put this) /var/log/ldap.log (that will make ldap.log one of the logs it rotates) ---------------------- Some notes: 1. The openldap people recommend a bdb type (and not ldbm type) database for the backend. Backing up the database with slapcat > filename ... and after making sure that "filename" is OK, removing all the files in /var/lib/ldap/ and using slapadd -l filename to restore can fix database issues. you can also use slapcat > filename ... edit slapd.conf to change from ldbm to bdb database type ... create a DB_CONFIG file in /var/lib/ldap/ and then do slapadd -l filename you need to chown all files to ldap.ldap in /var/log/ldap/ prior to restarting ldap. 2. look at the man pages for slapd_db_recover and slapindex and use those if you database is not good. 3. setup a test machine and play with slapcat and slapadd to get the hang of it first with the slapcat output file. 4. Here is my DB_CONFIG and changes specifically to slapd.conf for bdb (if you are not using it now): ---------------- ###DB_CONFIG### # # Set the database in memory cache size. # set_cachesize 0 52428800 0 # Automatically remove log files that are no longer needed. set_flags DB_LOG_AUTOREMOVE # # Set database flags. # (for database loading/reindexing) #set_flags DB_TXN_NOSYNC #set_flags DB_TXN_NOT_DURABLE # Set log values. # set_lg_regionmax 1048576 set_lg_max 10485760 set_lg_bsize 2097152 ------------------------ #slapd.conf adds# #database ldbm database bdb cachesize 100000 checkpoint 512 720 junji linux registered user #253162 Send instant messages to your online friends http://uk.messenger.yahoo.com

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Apache 2.2 under CentOS?
by Peter Serwe 19 Jan '07

19 Jan '07

We've been going through some growing pains fumbling through porting some custom C modules that used to live under apache 1.3 into the 2.0 spec, even though none of us really considers ourselves a 'C developer'. We've basically got them all working now under the 2.0 API, and the question was posed about whether or not we should consider attempting to upgrade everything to run under httpd-2.2. I noticed the httpd2 port is only 2.0.53 under CentOS, and I was wondering why that is? Is there a 2.2 port? Is there plans to do one? Was it tried and found that there are significant obstacles in the way of getting 2.2 to run under CentOS 4.4? Is there a port of 2.2 planned for 5.0? Is it a question of resources, and should we undertake it, do you guys want the resulting i686 RPM's? Comment Karanbir? Peter -- Peter Serwe <peter at infostreet dot com> http://www.infostreet.com "The only true sports are bullfighting, mountain climbing and auto racing." -Earnest Hemingway "Because everything else requires only one ball." -Unknown "Do you wanna go fast or suck?" -Mike Kojima "There are two things no man will admit he cannot do well: drive and make love." -Sir Stirling Moss

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centos driver disk?
by Steve Huff 19 Jan '07

19 Jan '07

the recent discussion of support for Promise SATA drives reminded me that a while back i remember reading about a project to assemble a driver disk to provide wider hardware support than just stock CentOS. how's that coming along? i don't see anything in the wiki about it... as i have a vested interest in this project (since i'm still relying on old MegaRAID controllers), i'd be willing to help out with it. what's the current status, and what needs doing? thanks, -steve -- If this were played upon a stage now, I could condemn it as an improbable fiction. - Fabian, Twelfth Night, III,v

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RE: [CentOS] Cluster with two i386 pcs!
by Dan Dansereau 18 Jan '07

18 Jan '07

Israel Hello - just my school of hard nocks experience, and running several clusters - from the small 2 dual cpu boxes, to my largest of 64 dual cpu boxes. Try using the following - it uses CENTOS as the base. http://www.rocksclusters.org/wordpress/ It is free, works perfectly on anything that CENTOS can run on, fairly well documentated, and a good support system / network of users. Dan Dansereau -----Original Message----- From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On Behalf Of israel.garcia(a)cimex.com.cu Sent: Thursday, January 18, 2007 2:07 PM To: centos(a)centos.org Subject: [CentOS] Cluster with two i386 pcs! I want to make a cluster with two simple (INTEL SATA) pcs using CentOS, my question is? Is there something easiest than Linux RedHat Cluster Manager to make a cluster using CentOS with just two pcs? Regards, Israel _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos

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Discuss January 2007