[Ocfs2-users] Please urgent help required - OCFS2 and VPN again

[Lorenzo Milesi]

I suppose rsync takes ages in reading all directory tree and directory
listing, as it has to dig it all!
This shouldn't be affected by drbd "writes", isn't it? Is it due to high
latency?

thanks!


Il giorno lun, 08/12/2008 alle 17.15 -0800, Sunil Mushran ha scritto:
> ocfs2 does not have a concept of "primary". While we do use
> lower node number as a tie breaker in the dlm, that in itself
> should not be affect the performance much.
> 
> See what rsync is doing.
> 
> Lorenzo Milesi wrote:
> > Thanks again.
> >
> > Another curiosity: as I told we have a rsync backup running on one node.
> > If that node is set "primary" (node number 0 in cluster.conf) that rsync
> > takes up to 4h for transferring very few files, while if I set it
> > "secondary" it takes 20m!
> >
> >
> >
> > Il giorno lun, 08/12/2008 alle 12.33 -0800, Sunil Mushran ha scritto:
> >   
> >> ocfs2's interconnect usage is latency sensitive. It does not use
> >> much bandwidth. While it has small packets, it has lots of them.
> >> It has been written with a low latency gige private interconnect
> >> in mind.
> >>
> >> In your setup you are using drbd which is replicating all block
> >> writes across the interconnect. That is bandwidth sensitive.
> >>
> >> The performance of the ocfs2 file system (all fses actually) is partly
> >> dependant on the underlying block device. If the block device is
> >> slow, the overall performance of the fs will be slow.
> >>
> >> Lorenzo Milesi wrote:
> >>     
> >>> Il giorno mar, 02/12/2008 alle 12.11 -0800, Sunil Mushran ha scritto:
> >>>   
> >>>       
> >>>> The interconnect is your bottleneck.
> >>>>     
> >>>>         
> >>> thanks for your answer. what could be the minimum bandwidth for letting
> >>> ocfs2 work fine?
> >>>
> >>> thanks
> >>>
> >>>   
> >>>       
> >>     
> 
> 
-- 
Lorenzo Milesi - lorenzo.milesi at yetopen.it

YetOpen S.r.l. - http://www.yetopen.it/
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