Re: [CentOS] Directory compare
2008/6/23 Spiro Harvey, Knossos Networks Ltd [EMAIL PROTECTED]: I have 2 drive sets that are supposed to be identical [I use CentOS 5]: A: 1.6Tb B: 1.49Tb I need to find the differences, any suggestion? diff will do it. diff -q /dir-a/ /dir-b/ the -q will just tell you what files are different, not what's different inside the files. I would like to do the same among two, several boxes, that is take thier dir listing to a certain depth, and compare it for differences as an integrity check that they have the same installation files? W. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Kernel panic - not syncing: CPU context corrupt
2008/6/20 Alwin Roosen [EMAIL PROTECTED]: Hi, Is there someone on this mailing list who could/want help me figure out this issue? We do not know where to look to solve this. If your installation is standard CentOS with no thirdparty software, and configurations, I would first run the vendor hardware checks several times, as they are usually not good with intermittent or hard to find problems, run extenisve memtest also if possible regards Walid ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] extremely slow network connection
I had an issue with PE1950, however [r|w]mem settings in sysctl from RHEL4 helped, however it is in a high speed gigabit LAN 2008/6/16 Dag Wieers [EMAIL PROTECTED]: On Mon, 16 Jun 2008, Peter Reinhardt wrote: Dear all, on a brand new DELL computer CentOS 5.1 installs well, but the internet connection is extremely slow (8 kB/s, indeed kiloBytes !). Did anyone find a solution to that problem ? It might be more DELL specific than CentOS specific. That is why I would probably ask DELL support (or look to see if they have their own set of drivers for this model) and ask on their forums/mailinglist. PS It would probably help to say what DELL hardware or at least what brand/model of Network Interface Card to have any meaningful conversation :) -- -- dag wieers, [EMAIL PROTECTED], http://dag.wieers.com/ -- [Any errors in spelling, tact or fact are transmission errors] ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Fwd: RHEL5 network throughput/scalability
Hi All, I have posted this messgage yesterday in the Beowulf mailing list, and did not get any responses, as i have tried different Centos kernels to see if the behaviour changes or not, and it did not change much, I am posting it here, I hope no one minds, and thanks in advance for any pointers or clues? -- Forwarded message -- From: Walid [EMAIL PROTECTED] Date: 2008/6/12 Subject: RHEL5 network throughput/scalability To: [EMAIL PROTECTED] Hi All, I have an issue with a new cluster setup where the nodes are RHEL5.1(with the latest 5.2 kernel), when i try to write NFS data, the nodes scale linearly until they reach the 10th node, that is the bandwidth , and throughput seen from the NFS sever on the other side of the nodes shows a liner increment from around 100+Mbyte/sec up to 1Gbyte/sec, however when we add another extra node to the equation the bandwidth/throughput becomes erratic/inconsistent, and drops to around 500-700Mbyte/sec. however if i try the same setup with RHEL4U6 i do not get the same behaviour it sustains the bandwidth at 1Gbyte/sec. the setup is like this 48 nodes sharing 48 port access switch that is up linked using 10g link to a CISCO 6509 switch which is linked to a Clustered NFS File system that consist of eight heads where each head linked using a 10G link to the 6509. the above was a write test, so i thought may be the tcp congestion kicked in, or sliding windows problem, however when i do a read test it gets worse, the scalability now is reduced to 5 nodes that is one node is able to read around 100 MBps, two will read double, and so on until you add the fifth node where the bandwidth drops from around 500+MBps to around 300, and again from RHEL4 the behaviour is different. any pointers? TIA Walid ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Fwd: RHEL5 network throughput/scalability
Hi Bent, Have you tried the latest bz32 kernel from Johnny? http://people.centos.org/hughesjr/kernel/5/ I have kind of lost faith in RH kernels as far as NFS performance is concerned - and yes, I know that the bz32 issue is supposedly solved in 5.2 but until we can positively confirm that ourselves I ain't letting it near our production servers Yes I did, however now that you mention it, when i did first time i had two issues one of performance that i am not getting the required performance in terms of bandwidth, and by applying the standard RHEL4 kernel network parameters that did fix it, now i am left with that scalability issue regards Walid ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
