[Ocfs2-users] Performance Problems while reading

[Alexei_Roudnev]

I'd better should not use drdb with OCFS, except for the _proof of concern_
or _learning_ things.

----- Original Message ----- 
From: "Sunil Mushran" <Sunil.Mushran at oracle.com>
To: <egon.burgener at terreactive.ch>
Cc: <ocfs2-users at oss.oracle.com>
Sent: Wednesday, February 21, 2007 9:54 AM
Subject: Re: [Ocfs2-users] Performance Problems while reading


> And you are convinced that drdb's primary-primary is not the
> cause for the slowdown. ??
>
> Egon Burgener wrote:
> > Hi all
> >
> > We are using a 2 node cluster with drbd 8 (primary/primary state) and
> > ocfs2. Reading a file on one node while it will be written on the other
> > node is very slow. Reading a file on node while it will be written on
> > the same node is fast.
> > In the first case the node which wants to read the file has to ask the
> > other to downgrade the locklevel. In my opinion this is a bottleneck, if
> > the files are big. Increasing clustersize did not really help.
> >
> > Is there a away to speed up the read of such a file?
> >
> > Is it possible to open files for reading in nolock mode (NL) instead of
> > (PR)?
> >
> > Thanks for your response,
> >
> > Egon
> >
> >
> >
> > _______________________________________________
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> > Ocfs2-users at oss.oracle.com
> > http://oss.oracle.com/mailman/listinfo/ocfs2-users
> >
>
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