From: Emmanuel Florac <eflorac@intellique.com>
To: Dave Chinner <david@fromorbit.com>
Cc: xfs@oss.sgi.com, Wei Lin <lin.wei15@imperial.ac.uk>
Subject: Re: Question on migrating data between PVs in xfs
Date: Thu, 11 Aug 2016 12:44:59 +0200 [thread overview]
Message-ID: <20160811124459.57f9a352@harpe.intellique.com> (raw)
In-Reply-To: <20160810215149.GM19025@dastard>
Le Thu, 11 Aug 2016 07:51:49 +1000
Dave Chinner <david@fromorbit.com> écrivait:
> On Wed, Aug 10, 2016 at 06:31:32PM +0200, Emmanuel Florac wrote:
> > Le Wed, 10 Aug 2016 20:56:39 +1000
> > Dave Chinner <david@fromorbit.com> écrivait:
> >
> > > Have you lookd at using dm-cache instead of modifying the
> > > filesystem?
> > >
> >
> > Or bcache, fcache, or EnhanceIO. So far from my own testing bcache
> > is significantly faster and dm-cache by far the slowest of the
> > bunch, but bcache needs some more loving (his main developer is
> > busy writing some new tiered, caching filesystem instead).
>
> Yeah, the problem with bcache is that it is effectively an orphaned
> driver. If there are obvious and reproducable performance
> differentials between bcache and dm-cache, you should bring them to
> the attention of the dm developers to see if they can fix them...
Good idea. Well bcache may be orphaned of its main developer, however
others still submit quite a lot of stability patches (among them
Christoph Hellwig which is also active here IIRC).
--
------------------------------------------------------------------------
Emmanuel Florac | Direction technique
| Intellique
| <eflorac@intellique.com>
| +33 1 78 94 84 02
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next prev parent reply other threads:[~2016-08-11 10:45 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-09 14:50 Question on migrating data between PVs in xfs Wei Lin
2016-08-09 22:35 ` Dave Chinner
[not found] ` <20160810092313.GA16193@ic>
2016-08-10 10:56 ` Dave Chinner
2016-08-10 16:31 ` Emmanuel Florac
2016-08-10 21:51 ` Dave Chinner
2016-08-11 9:26 ` Wei Lin
2016-08-11 10:44 ` Emmanuel Florac [this message]
2016-08-11 9:04 ` Wei Lin
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