Discuss

discuss@lists.centos.org

34758 discussions

CentOS 4.4-IBM Netvista Performace Problems, help needed.
by Chuck Mattern 23 Feb '07

23 Feb '07

I've got an odd situation that I need some advise on. I have two computers that I am planning to use as a cluster. I initially started with some left over Compaq Presairos with 667MHz CPUs. I loaded CentOS 4.3 and later updated to 4.4. Things ran normally, albeit slowly. I had an opportunity to upgrade to a pair of IBM Netvistas with 2.26 GHz CPUs, I did this by transferring the 160GB Western Digital IDE disks and NICs but did not re-install the OS, just migrated the disks. Since then they have had the following symptoms: -Systems frequently boot faster than the disks can be spun up and have to be soft booted to recognize and boot from the disks. -Systems will bog down critically after approximately 24 hours loosing system time at an increasing rate, ofrr instance a for loop that runs date, hwclock ans then sleeps for 10 minutes will show time in sync for the first few hours then the system time will begin to fall behind at an increasing rate, after 24 hours the system time essentially stops elapsing. It almost feels like the box has trouble processing interrupts. Once it gets to this state performance becomes very sluggish, for instance top will take up to 90 seconds to display it's first screen and will not update on it's own, only when Enter is depressed. At times top will show 0's across the utilization line for everything including idle. I have gone as far as to boot one of the boxes into single user mode and run the date/hwclock loop and even in that state the system will bog down and gradually stop elapsing time after 18-24 hours. Even shutting down is impacted. A reboot will take well over an hour to process. I had a copy of Ubuntu on my desk and have booted into that distro from cd and it passes the date/hwclock test (actually lost 2 seconds over a 24 hour period but I can live with that via ntp). I'm downloading a copy of the CentOS live 4.4 cd and will try this with that as well but at this time does anyone see that this could be something other than a disk incompatibility with the newer systems? Should I try re-installing? If it is the disks, any thoughts on something I could try to avoid buying new disks (I have tried setting the BIOS to both the high performance and legacy disk modes (not entirely sure what's behind that IBMism)). Regards, Chuck

4 5

How do I build a modified rpm (Another newbie question)?
by Mark Hull-Richter 23 Feb '07

23 Feb '07

I made a minor change to the XFS package (in the unpacked source files), but I can't figure out which rpmbuild option to use to build from that changed source file (instead of re-unpacking all the source files, overwriting all the source files, etc.). Please assist/explain. Thanks.

2 1

Centos firewall/router issue
by Dustin Krysak 22 Feb '07

22 Feb '07

Good day everyone. Today has been "one of those..." days. So I have a feeling this is just a brain lapse here. At any rate, I am setting up a firewall/router using centos 4.4 (minimal install, yummed up to date). I have in fact enables V4 ip forwarding (by editing /etc/sysctl.conf) and rebooted the system. I use fwbuilder for my rules, and at this point have a next to nothing set of rules. a DHCP server is also residing on this router. Now the firewall can get pings back from various sources on the net by IP and by host name. The firewall can also ping the workstations, and the workstations can ping hte firewall (VIA the internal IP). The work stations are in fact getting proper IP info from the DHCP server (I have released and renewed it many times as well as rebooted). Now the issue is, I can not get out of the internal network to the internet for any traffic. Pings (by ip and name), web sites, etc. It "seems" like the traffic is not being forwarded, but I have run the following command to confirm the ip forwarding is on: # cat /proc/sys/net/ipv4/ip_forward And I do in fact have a "1" in there. Did I miss one little step somewhere? I have set these things up before without issue, so I suspect I am over looking a little step here. Ideas?

3 3

RE: [CentOS] USB flash drive stopped working properly....
by Mark Hull-Richter 22 Feb '07

22 Feb '07

How did you manually mount it? I tried and it would not recognize the mount point.... > -----Original Message----- > From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On > Behalf Of David A. Woyciesjes > Sent: Thursday, February 22, 2007 11:30 AM > To: CentOS mailing list > Subject: Re: [CentOS] USB flash drive stopped working properly.... > > Hmmm, this might be similar to my issue. I have 2 USB keys, one > mounts > okay, 256MB SanDisk SD card in an adapter), the other (SanDisk Cruzer > mini 256MB) gets funky, won't automatically mount. But when I manually > mount it, the automount part finally works. > Last week I posted a message (with no replies) about the Cruzer not > being able to mount at all. The only change this time was I ran (in > Windows) Scandisk.on the Cruzer. Still not quite right, though. > And my box is a Precision 530... > I ran chkdsk on it when I got home to my Windows box, and it came out fine, and it's working fine today, too. Thanks.

2 2

BETA 2
by Jerry Geis 22 Feb '07

22 Feb '07

So is beta 2 off - in favor of just waiting for the real RHEL5 release? RH has said it is ready to go and would be released in march. Hopefully march 1. HA! No complaining just curious. Jerry

8 10

RE: [CentOS] USB flash drive stopped working properly....
by Mark Hull-Richter 22 Feb '07

22 Feb '07

Theoretically, but it works perfectly today, last night and this morning on my Windows (ugh) machine at home, everywhere else.... So far, I've never had a flash drive fail, and this one is supposed to be better than most (plus, it's only about five months old...). So, I doubt it.... > -----Original Message----- > From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On > Behalf Of Alvin Chang > Sent: Thursday, February 22, 2007 10:35 AM > To: CentOS mailing list > Subject: Re: [CentOS] USB flash drive stopped working properly.... > > On 22/02/07, Mark Hull-Richter <mhull-richter(a)datallegro.com> wrote: > > Is there some time limit on how long a USB flash drive will work in > > CentOS or is this a bug or ? ? ? > Gees, couldn't it be a busted flash drive? The least robust components > in your setup is the flash drive. > > -- > Alvin Chang Yu-Ming > _______________________________________________ > CentOS mailing list > CentOS(a)centos.org > http://lists.centos.org/mailman/listinfo/centos

1 0

Re: CentOS Digest, Vol 25, Issue 22
by richardy＠tppvideo.com 22 Feb '07

22 Feb '07

I will be away from the office until Tuesday, February 27th. If you are in need of technical support please send your email to: support(a)tppvideo.com otherwise I will return your e-mail as soon as possible upon my return. --- Richard Ybarra Twin Palms Productions, Inc. http://www.tppvideo.com PH: 512-377-1719 ATTENTION! The information contained in this email may be CONFIDENTIAL and PRIVILEGED. It is intended for the individual or entity named above. If you are not the intended recipient, please be notified that any use, review, distribution or copying of this email is strictly prohibited. If you have received this email by error, please delete it and notify the sender immediately. Thank you.

1 0

CentOS-announce Digest, Vol 24, Issue 12
by centos-announce-request＠centos.org 22 Feb '07

22 Feb '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-2007:0074 Important CentOS 4 ia64 spamassassin - security update (Pasi Pirhonen) 2. CESA-2007:0074 Important CentOS 4 s390(x) spamassassin - security update (Pasi Pirhonen) ---------------------------------------------------------------------- Message: 1 Date: Wed, 21 Feb 2007 21:24:09 +0200 From: Pasi Pirhonen <upi(a)centos.fi> Subject: [CentOS-announce] CESA-2007:0074 Important CentOS 4 ia64 spamassassin - security update To: centos-announce(a)centos.org Message-ID: <20070221192409.GC11744(a)centos.fi> Content-Type: text/plain; charset="us-ascii" CentOS Errata and Security Advisory 2007:0074 https://rhn.redhat.com/errata/RHSA-2007-0074.html The following updated files have been uploaded and are currently syncing to the mirrors: files: updates/ia64/RPMS/spamassassin-3.1.8-2.el4.ia64.rpm -- Pasi Pirhonen - upi(a)iki.fi - http://pasi.pirhonen.eu/ Top-postings silently ignored

1 0

Centosplus
by John Hinton 22 Feb '07

22 Feb '07

Are there any gotchas with doing a MySQL5 upgrade from the centosplus repostitory? Can this be done as an update via yum or do I need to uninstall and the install? There wasn't anything on this in the readme.txt file. Thanks, John Hinton

5 5

alternative to rocks cluster
by Tom Brown 22 Feb '07

22 Feb '07

Hi I am after a solution where i can easily kickstart many, read hundreds, of boxes in a short time frame. Perhaps the way i install software is to actually re-kix the box with a new software baseline - that type of idea. I have looked at rocks and it looks good but it seems a little rigid in that i need to be able to determine certain things like hostname etc as in our env hostname represents box location etc. Are there any tools out there that do things as 'easily' as rocks but with more customization in them? Rocks seems to be based on beowulf type clusters where our setup is more an application type affair where communication it between the apps and not through the master box. thanks for any pointers

7 9

Jump to page:

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

Discuss