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34753 discussions

processor affinity
by Adam Grossman 18 Feb '10

18 Feb '10

Hello, i am running CentOS 5.4. i have a requirement where i need to have 1 application have a single processor all to its self, and the rest of the system run on the other processors. "taskman" lets me bind the process to a processor(s), but it does not make it exclusive. Is this possible to do? i have even tried mucking around with the rc.sysinit, but to no avail. thank you very much, -=- adam grossman

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annoying random Firefox crash - how to debug?
by Rudi Ahlers 18 Feb '10

18 Feb '10

Hi, My firefox (Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.6) Gecko/20091216 Fedora/3.5.6-1.fc11 Firefox/3.5.6) on Gnome 2.26.3 will randomly crash, without any errors. /var/log/messages & /var/log/Xorg.0.log doesn't show anything that caused any errors. And it doesn't matter on which website(s) I'm busy with, it will just crash. Does anyone know how to check for a problem? My PC has: Intel Pentium(R) Dual-Core E5200 CPU 4GB DDRII Corsair RAM 3x 160GB SATAII HDD Asus Nvidia 8800GT graphics card. I have updated to the latest nVidia drivers [root@Rudi-PC ~]# dmesg | grep nvidia nvidia: module license 'NVIDIA' taints kernel. nvidia 0000:01:00.0: setting latency timer to 64 nvidia-config-d[1399]: segfault at 7f0888000000 ip 0000003ff107bf54 sp 00007ffff39d1898 error 4 in libc-2.10.2.so[3ff1000000+164000] [root@Rudi-PC ~]# dmesg | grep nvidia nvidia: module license 'NVIDIA' taints kernel. nvidia 0000:01:00.0: setting latency timer to 64 nvidia-config-d[1399]: segfault at 7f0888000000 ip 0000003ff107bf54 sp 00007ffff39d1898 error 4 in libc-2.10.2.so[3ff1000000+164000] [root@Rudi-PC ~]# uname -a Linux Rudi-PC 2.6.30.10-105.2.23.fc11.x86_64 #1 SMP Thu Feb 11 07:06:34 UTC 2010 x86_64 x86_64 x86_64 GNU/Linux P.S. This is on Fedora Core 12, but it's RH based, so I thought maybe someone on this list might have some insight into the problem? -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532

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udp stream multiply
by Jure Pečar 18 Feb '10

18 Feb '10

Hello, Not strictly a CentOS question, but I hope someone can hint me in the right direction ... I have an incoming udp data stream to public interface that I want to duplicate and multipy to three or more destinations on the internal interface. Currently I've managed to put together netcat listener with output to pipe and socat reading from that pipe to a single destination. I hoped I could have more than one socat reader from the pipe, but that does not seem to be the case. So I'm able to only redirect stream to a single destination on lan. I'd also like to avoid this mess of shell tools and pipes and am looking for a cleaner solution. Any hints? -- Jure Pečar http://jure.pecar.org

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Clustering apache
by Dan Burkland 17 Feb '10

17 Feb '10

I'm a greenhorn when it comes to clustering in RHEL/CentOS and recently setup an active/standby clustering using Apache & Heartbeat. It seems to be a good entry step into clustering however after testing it I was disappointed in that the resource manager does not start httpd on node2 if httpd on node1 is dead (only starts httpd on node2 if the heartbeat daemon on node1 is dead). Is there anyway to achieve this setup if not with Heartbeat with some sort of other HA solution? Thank you! Dan

3 3

DRBD Info
by Joseph L. Casale 17 Feb '10

17 Feb '10

Hey Guys, I want to use drbd (prot A) to handle replication for some backup volumes. I see 8/8.2/8.3 available, are the 8.3 packages considered stable? The files on the primary node will be from 2->400 gig in size. The nodes are interconnected by gig fiber, the volumes will be lvm backed, given I have never used drbd are there aspects of this that glare out? Thanks! jlc

1 0

a VNC client suitable to monitor 15 desktops in 1 screen, automatic reconnect. Exists?
by Andres Salazar 17 Feb '10

17 Feb '10

Hello, Is there a VNC client out there that can permit me to run it 15 times simultaneously and scale them smaller so that I can view 15 little remote screens (at the same time) in my one big monitor? Also, is there a way to make it so if the PC is rebooted the client automatically reconnects ? The goal of this is to have one big monitor to view in realtime what people are doing in their PCs. Without interaction from me with the mouse/keyboard.. all I need to do is watch. A plus if this VNC client is compatible with MacOS/windows Andres

3 2

SAS raid controllers
by Gordon McLellan 17 Feb '10

17 Feb '10

Is anyone running either the newish Adaptec 5805 or the new LSI (3ware) 9750 sas raid controllers in a production environment with Centos 5.3/5.4? The low price of these cards makes me suspicious, compared to the more expensive pre-merger 3ware cards and considerably more expensive Areca ARC-1680. I've been 'burned' by the low cost of Promise raid cards (just as this group pointed out, they're crap cards!), but I'm still not convinced that most expensive == best. When it comes to parallel scsi cards, Adaptec has always been my choice regardless of platform, but I've never used their serial scsi products. I have several older pre-merger 3ware cards installed and have been working flawlessly for years, but under a windows environment. I noticed none of these manufacturers are listed on the upstream provider's HCL, yet they all eagerly claim "Linux" support on their respective websites.. The Adapetc website actually names both Centos and the upstream provider as 'supported'. Kind Regards, Gordon

4 3

Load Balancer (heartbeat, ldirectord, ipvsadm) + Apache Problem
by Roberto HT 17 Feb '10

17 Feb '10

Hi, I'm having this problem with load balancer. I already setup the load balancer and two servers behind it with this kind of topology ----------------------------------------------------- request -> DIRECTOR -- Server 1 \ Server 2 ----------------------------------------------------- DIRECTOR's (RHEL 5) Virtual IP = 192.168.1.1 Server 1's (RHEL 4.4) Virtual IP = 192.168.1.2 Server 2's (CentOS 5.3) Virtual IP = 192.168.1.3 The problem is when I try to hit the 192.168.1.1, it sometimes give me a HTTP 200 and sometimes it will timed out. I hit it using lynx -dump. It should return "Hello world!" if success. But if we hit it directly to 192.168.1.2:80 and 192.168.1.3:80, it will return HTTP 200 which means no error and no timeout. Since the Server 1 is the same as Server 2 in configuration, are there somethings I missed here? Another information is that I set the director using round robin algorithm, so everytime a successful hit returned from server 1, the next one is surely heading to Server 2 right? Based on the Apache's access log, I also knew that the timed out occured when it is the Server 2's turn to handle the request. Aside from the same httpd.conf and the same httpd version are there any things in the system level, kernel level that should be the same between those two servers? Thanks. Roberto

2 3

What is the driver for Intel Corporation Mobile GM965/GL960 Graphics Controller ?
by hce 17 Feb '10

17 Feb '10

Hi, What is the driver name for Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (rev 03) I can download from yum? Thank you. Kind Regards

1 0

Anyone using Active Driectory auth with Centos 5.4.....?
by Tom Bishop 17 Feb '10

17 Feb '10

Setting up a new backuppc for a small group of device and I am running centos 5.4 with winbind setup and working. Everything is working and I would like the users to authenicate using their AD creds and was wondering what folks are using to do that with apache 2.2 and centos 5.4. I know about mod_auth_pam but that seems pretty dead so I was just wondering what folks were using and whats the easiest to setup. Any pointers to any how to's would be appreciated...Thanks.

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