[Linux-cluster] DLM Book updated

[Christine Caulfield]

Alain RICHARD wrote:
> 
> Le 9 juin 08 à 11:21, Christine Caulfield a écrit :
> 
>> I have updated the "Programming Locking Applications" document. Lots 
>> of typos and bizarre sentences have been fixed (thanks Bob!). I have 
>> also added a new section (chapter 5) which is an overview of the DLM 
>> internals for those that want to understand a little of how and where 
>> locks are mastered etc.
>>
>> It's no substitute for reading the code but it might make it a little 
>> easier :)
>>
>> http://people.redhat.com/ccaulfie/docs/rhdlmbook.pdf
>>
>> Chrissie
>>
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> 
> You mention in this document that dlm is able to use SCTP, but I found 
> no information on how to do it, is there any documents about it ?
> 

It's not (well) tested so it's regarded as unsupported at the moment. If 
you want to test it you'll need to add this to cluster.conf (inside the 
<cluster> tags:

<dlm protocol="sctp"/>

and the following sysctls to keep SCTP itself happy"

# echo 4194304 > /proc/sys/net/core/rmem_default
# echo 4194304 > /proc/sys/net/core/rmem_max


Chrissie