mike wrote: > I have changed my kernel back to 2.6.22-14-server, and now I don't get > the kernel panics. It seems like an issue with 2.6.24-16 and some i/o > made it crash... > OK, so it seems that it is a bug for ocfs2 kernel, not the ocfs2-tools. :) Then could you please describe it in more detail about how the kernel panic happens? > However I am still getting file access timeouts once in a while. I am > nervous about putting more load on the setup. > Also please provide more details about it. > > > [EMAIL PROTECTED] .batch]# cat /etc/default/o2cb > > # O2CB_ENABLED: 'true' means to load the driver on boot. > O2CB_ENABLED=true > > # O2CB_BOOTCLUSTER: If not empty, the name of a cluster to start. > O2CB_BOOTCLUSTER=mycluster > > # O2CB_HEARTBEAT_THRESHOLD: Iterations before a node is considered dead. > O2CB_HEARTBEAT_THRESHOLD=7 > This value is a little smaller, so how did you build up your shared disk(iSCSI or ...)? The most common value I heard of is 61. It is about 120 secs. I don't know the reason and maybe Sunil can tell you. ;) You can also refer to http://oss.oracle.com/projects/ocfs2/dist/documentation/ocfs2_faq.html#TIMEOUT. > # O2CB_IDLE_TIMEOUT_MS: Time in ms before a network connection is > considered dead. > O2CB_IDLE_TIMEOUT_MS=10000 > > # O2CB_KEEPALIVE_DELAY_MS: Max time in ms before a keepalive packet is sent > O2CB_KEEPALIVE_DELAY_MS=5000 > > # O2CB_RECONNECT_DELAY_MS: Min time in ms between connection attempts > O2CB_RECONNECT_DELAY_MS=2000 > > > On 4/21/08, Tao Ma <[EMAIL PROTECTED]> wrote: > >> Hi Mike, >> Are you sure it is caused by the update of ocfs2-tools? >> AFAIK, the ocfs2-tools only include tools like mkfs, fsck and tunefs etc. So >> if you don't make any change to the disk(by using this new tools), it >> shouldn't cause the problem of kernel panic since they are all user space >> tools. >> Then there is only one thing maybe. Have you modify /etc/sysconfig/o2cb(This >> is the place for RHEL, not sure the place in ubuntu)? I have checked the rpm >> package for RHEL, it will update /etc/sysconfig/o2cb and this file has some >> timeouts defined in it. >> So do you have some backups for this file? If yes, please restore it to see >> whether it helps(I can't say it for sure). >> If not, do you remember the old value of some timeouts you set for ocfs2? If >> yes, you can use o2cb configure to set them by yourself. >>
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