[Ocfs2-users] Did anything substantial change between 1.2.4 and 1.3.9?

[Tao Ma]

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.
>
>
> [root at raid01 .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 <tao.ma at oracle.com> 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.
>>