[Linux-cluster] CS4 U4 / timers tuning

[Alain Moulle]

Thanks Chrissie

And is there a way to change the dlm lock_timeout with
a parameter in cluster.conf ?

Thanks
Regards
Alain

Alain Moulle wrote:

>> Hi
>>
>> is there a rule to follow between the DLM lock_timeout
>> and the deadnode_timeout value ?
>> Meaning for example that the first one must be always lesser than
>> the second one ?
>>
>> And if so, could we have a deadnode_timeout=60s and the
>> /proc/cluster/config/dlm/lock_timeout at 70s ? or are
>> there some upper limits not to exceed ?


The DLM's lock_timeout should always be greater than cman's
deadnode_timeout. A sensible minimum is about 1.5 times the cman value,
but it can go as high as you like.


>> Another question :
>> is there somewhere a list of all parameters around CS4 that
>> we are allowed to tune ?


This isn't exactly 'documentation' but it does briefly describe the cman
tunables:

http://sourceware.org/git/?p=cluster.git;a=blob_plain;f=cman-kernel/src/config.c;hb=RHEL4

-- Chrissie