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34758 discussions

Painfully slow NetApp with databas
by Mindaugas Riauba 07 Nov '08

07 Nov '08

Hello, We have long running problem with NetApp filers. When we connect server to the filer sequential read performance is ~70MB/s. But once we run database on the server seq read performance drops to ~11MB/s. That's happening with two servers. One is running Oracle another - MySQL. During speed tests database load is very light (less than 1MB/s of reads and writes). During the tests NetApp was serving only these two servers. What could be causing such slowdown and overall slow read performance? Writes are fast >100MB/s. NetApp support is claiming that such performance is normal. Somehow I do not believe that 2007 model should deliver such XXth century performance levels. :) RHEL4 fully updated 64 bits connected to NetApp FAS3040 via SAN using Qlogic 2Gb/s FC adapters. Tried both drivers from Redhat and QLogic (for NetApp). Also changing of FC parameters (like queue size) did not help. Regards, Mindaugas

5 4

Check my math please
by Sean Carolan 07 Nov '08

07 Nov '08

Ok this is kind of a goofy question but I want to make sure I get it right. Suppose we have a 25 mb video, that is 117 seconds long. If we wish for this streaming video to play smoothly with no compression, buffering or skipping, the following bandwidth requirements must be met: 25 megabytes = 204800 kilobits. 204800 kb / 117 seconds ~ 1750kb/s Does that look right to you?

7 9

yum and /etc/redhat-release
by Agile Aspect 06 Nov '08

06 Nov '08

Hi - I used yum to update CentOS 4.6. After the reboot after the upgrade, the file /etc/redhat-release still indicates I'm at CentOS 4.6. The lastest release of CentOS 4 is CentOS 4.7. So how do I use yum to upgrade from 4.6 to 4.7? Any help would be greatly appreciated. -- Ken -- Article. VI. Clause 3 of the constitution of the United States states: "The Senators and Representatives before mentioned, and the Members of the several State Legislatures, and all executive and judicial Officers, both of the United States and of the several States, shall be bound by Oath or Affirmation, to support this Constitution; but no religious Test shall ever be required as a Qualification to any Office or public Trust under the United States."

3 3

Cluster Heart Beat Using Cross Over Cable
by lingu 06 Nov '08

06 Nov '08

Hi, I am running two node active/passive cluster running Centos3 update 8 64 bit on Hp Box with external hp storage connected via scsi. My cluster was running fine for last 3 years.But all of a sudden cluster service keep on shifting (atleast one time in a day )form one node to another. After analysed the syslog i found that due to some network fluctuation service was getting shifted.Both the nodes has two NIC bonded together and configured with below ip. My network details: 192.168.1.2 --node 1 physical ip with class c subnet (bond0 ) 192.168.1.3 --node 2 physical ip with class c subnet (bond0 ) 192.168.1.4 --- floating ip ( cluster ) Since it is a very critical and busy server may be due to heavy network load some hear beat signal is getting missed resulting in shifting of service from one node to another. So i planned to connect crossover cable for heart beat messages, can any one guide me or provide me the link that best explains how to do the same and the changes i have to made in cluster configuration file after connecting the crossover cable. Regards, Lingu

4 3

apache content rewriting?
by Les Mikesell 06 Nov '08

06 Nov '08

I'm using apache with mod_proxy to make the server appear at a different location and port and need to tweak some absolute references in the content as it goes by. mod_proxy_html looked promising - and appears to work - but seems to be making the httpd process consume a lot of CPU on occasion. mod_substitute as included in more recent apache versions should work and mod_sed is another possibility. Has anyone solved this problem with the version of httpd in RHEL/Centos? -- Les Mikesell lesmikesell(a)gmail.com

1 0

CentOS-announce Digest, Vol 45, Issue 3
by centos-announce-request＠centos.org 06 Nov '08

06 Nov '08

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-2008:0957 Important CentOS 5 i386 kernel Update (Karanbir Singh) 2. CESA-2008:0957 Important CentOS 5 x86_64 kernel Update (Karanbir Singh) 3. CESA-2008:0939 Important CentOS 3 i386 openoffice.org - security update (Tru Huynh) 4. CESA-2008:0939 Important CentOS 3 x86_64 openoffice.org - security update (Tru Huynh) ---------------------------------------------------------------------- Message: 1 Date: Wed, 5 Nov 2008 16:01:40 +0000 From: Karanbir Singh <kbsingh(a)centos.org> Subject: [CentOS-announce] CESA-2008:0957 Important CentOS 5 i386 kernel Update To: centos-announce(a)centos.org Message-ID: <20081105160140.GA15839(a)vkalu.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2008:0957 Important Upstream details at : https://rhn.redhat.com/errata/RHSA-2008-0957.html The following updated files have been uploaded and are currently syncing to the mirrors: ( md5sum Filename ) i386: a1f5acb59c9efdf61142dca4aa7d2c5a kernel-2.6.18-92.1.17.el5.i686.rpm 620a5f4503efb19efdeb32ecceb66f09 kernel-debug-2.6.18-92.1.17.el5.i686.rpm c87d75413967df8a1f25365196166bc9 kernel-debug-devel-2.6.18-92.1.17.el5.i686.rpm 18e12ee11769453a52967279f1d1abc8 kernel-devel-2.6.18-92.1.17.el5.i686.rpm 211a7437a8274da07e910f7a1871c7cd kernel-doc-2.6.18-92.1.17.el5.noarch.rpm 10ad35a5cb7b6b1bbfacae9bab189bcd kernel-headers-2.6.18-92.1.17.el5.i386.rpm 7e588672e5c1099e9185b4c9bbed247a kernel-PAE-2.6.18-92.1.17.el5.i686.rpm 35f4ce56311a46c6e84977bbf2c83dcf kernel-PAE-devel-2.6.18-92.1.17.el5.i686.rpm da483295a4527ea011e0dd98ab1bfbef kernel-xen-2.6.18-92.1.17.el5.i686.rpm c328b0c3eae4ebf18ab313e71e956e21 kernel-xen-devel-2.6.18-92.1.17.el5.i686.rpm Source: ee6c5732dd3fbe352475342f04c50366 kernel-2.6.18-92.1.17.el5.src.rpm -- Karanbir Singh CentOS Project { http://www.centos.org/ } irc: z00dax, #centos(a)irc.freenode.net ------------------------------ Message: 2 Date: Wed, 5 Nov 2008 16:01:45 +0000 From: Karanbir Singh <kbsingh(a)centos.org> Subject: [CentOS-announce] CESA-2008:0957 Important CentOS 5 x86_64 kernel Update To: centos-announce(a)centos.org Message-ID: <20081105160145.GA15852(a)vkalu.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2008:0957 Important Upstream details at : https://rhn.redhat.com/errata/RHSA-2008-0957.html The following updated files have been uploaded and are currently syncing to the mirrors: ( md5sum Filename ) x86_64: a933293dc1f8cd8e123259157b26994c kernel-2.6.18-92.1.17.el5.x86_64.rpm c275d984c75dca19597a8119cb63161f kernel-debug-2.6.18-92.1.17.el5.x86_64.rpm 0c06b5ddd351aac1c34de18ed312470f kernel-debug-devel-2.6.18-92.1.17.el5.x86_64.rpm 680a4fcd5e4fb5a2cb16ccf71c04c61d kernel-devel-2.6.18-92.1.17.el5.x86_64.rpm 210b1ee819e64793c6ef2ea814fd8ef4 kernel-doc-2.6.18-92.1.17.el5.noarch.rpm d0bdbc18f02c82b7f7b9336a69c1ce51 kernel-headers-2.6.18-92.1.17.el5.x86_64.rpm 5196a4a313daee87b892085dfecc00e0 kernel-xen-2.6.18-92.1.17.el5.x86_64.rpm e2bcac26114291a19968de0b43557569 kernel-xen-devel-2.6.18-92.1.17.el5.x86_64.rpm Source: ee6c5732dd3fbe352475342f04c50366 kernel-2.6.18-92.1.17.el5.src.rpm -- Karanbir Singh CentOS Project { http://www.centos.org/ } irc: z00dax, #centos(a)irc.freenode.net ------------------------------ Message: 3 Date: Wed, 5 Nov 2008 19:54:09 +0100 From: Tru Huynh <tru(a)centos.org> Subject: [CentOS-announce] CESA-2008:0939 Important CentOS 3 i386 openoffice.org - security update To: centos-announce(a)centos.org Message-ID: <20081105185409.GA1880(a)sillage.bis.pasteur.fr> Content-Type: text/plain; charset="us-ascii" CentOS Errata and Security Advisory CESA-2008:0939 openoffice.org security update for CentOS 3 i386: https://rhn.redhat.com/errata/RHSA-2008-0939.html The following updated file has been uploaded and is currently syncing to the mirrors: i386: updates/i386/RPMS/openoffice.org-1.1.2-43.2.0.EL3.i386.rpm updates/i386/RPMS/openoffice.org-i18n-1.1.2-43.2.0.EL3.i386.rpm updates/i386/RPMS/openoffice.org-libs-1.1.2-43.2.0.EL3.i386.rpm source: updates/SRPMS/openoffice.org-1.1.2-43.2.0.EL3.src.rpm You may update your CentOS-3 i386 installations by running the command: yum update openoffice.org Tru -- Tru Huynh (mirrors, CentOS-3 i386/x86_64 Package Maintenance) http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xBEFA581B

1 0

Yum loses memory when kernel is upgraded
by Jussi Hirvi 06 Nov '08

06 Nov '08

Centos 5.x Why could this be? After I loaded a xen kernel (by mistake), yum seemed to lose its knowledge of my CentOS version. I had that fixed by "yum install centos-release" (I had first to fix the repo addresses for this to succeed). But after that, I noticed that yum did not remember anymore, what packages were already installed. It seems that the something happens to the rpm databases. I think this is connected to kernel upgrades - that is, every time I update the kernel, the rpm databases are spoiled... (or something). Right now both of these commands: yum list installed rpm --query -a ...produce identical results (for practical purposes). Neither list contains for example amavisd-new, which I'm sure I have installed. Does someone know a way to prevent the "memory loss" from happening again? - Jussi -- Jussi Hirvi * Green Spot Topeliuksenkatu 15 C * 00250 Helsinki * Finland Tel. & fax +358 9 493 981 * Mobile +358 40 771 2098 (only sms) jussi.hirvi(a)greenspot.fi * http://www.greenspot.fi

3 7

Running the installer from working linux
by Jason Pyeron 06 Nov '08

06 Nov '08

I have a box, with no CD rom or accessible ports and no PXE boot support. I do have root access. I would like to install a fresh copy of Centos 4. How do I run the installer from inside a working linux? -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- - - - Jason Pyeron PD Inc. http://www.pdinc.us - - Principal Consultant 10 West 24th Street #100 - - +1 (443) 269-1555 x333 Baltimore, Maryland 21218 - - - -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- This message is copyright PD Inc, subject to license 20080407P00.

3 6

mock
by Jason Pyeron 06 Nov '08

06 Nov '08

Does the centos project maintain a copy of mock to install? If not which mock should I install? -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- - - - Jason Pyeron PD Inc. http://www.pdinc.us - - Principal Consultant 10 West 24th Street #100 - - +1 (443) 269-1555 x333 Baltimore, Maryland 21218 - - - -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- This message is copyright PD Inc, subject to license 20080407P00.

5 13

VMWare Sandbox
by Thom Paine 05 Nov '08

05 Nov '08

I need to experiment with ldap for a site I manage, and wondered if vmware would be a good way to go for some testing. My current server is RHEL3, which is getting dated, and I think that I should refresh this server entirely in the move to ldap. We need to have an ldap server for publishing email addresses for a VPN for a nursing home that the upstream can harvest and we can browse to send confidential patient records. RHEL3 prollie won't cut it, so I'm considering moving to CentOS5. If I get a nice working test environment working, I wondered about running the server on VMWare, because the hardware will likely need to be refreshed in 2 years anyways. Copying the vmware file and the data to a new server would make for a fast upgrade. Any feedback on what I am attempting to do here? Any other recommendations on how I should tackle this? Currently I'm using Samba 3 with passdb. It's nothing fancy, but it works. We have about 20 XP machines here. The server also hosts mail as well. -- -=/>Thom

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