From: Zdenek Kabelac <zkabelac@redhat.com>
To: LVM general discussion and development <linux-lvm@redhat.com>
Cc: Oliver Rath <rath@mglug.de>
Subject: Re: [linux-lvm] howto speed-up thinpool-devices?
Date: Tue, 03 Sep 2013 12:54:40 +0200 [thread overview]
Message-ID: <5225BFF0.2040300@redhat.com> (raw)
In-Reply-To: <521871FD.8000700@mglug.de>
Dne 24.8.2013 10:42, Oliver Rath napsal(a):
> Hi list,
>
> Im using thinpool-devices (and snapshots, too). I know, thinpool-devices
> arent the fastest one, but maybe there could make more use of read (and
> maybe write) caching. In my test-system are 32GB of ram, but there is a
> max use of cache about <1GB, not more, by heavily use of these devices.
>
> Is it possible to speed up the reading with growing up the cache use?
> The /sys/block/dm-X/.. directories have lots of parameters, but Im not
> experienced for that. Maybe Im looking at the wrong place and modifying
> kernel parameters (scheduler etc.) are the better way?
>
You could look at lot of Howto text around various kernel settings i.e.:
http://en.wikipedia.org/wiki/Swappiness
https://www.kernel.org/doc/Documentation/sysctl/vm.txt
Check with Google for more hints.
Zdenek
prev parent reply other threads:[~2013-09-03 10:54 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-24 8:42 [linux-lvm] howto speed-up thinpool-devices? Oliver Rath
2013-09-03 10:06 ` Marian Csontos
2013-09-28 20:42 ` [linux-lvm] buffers shared between different devs? (was: howto speed-up thinpool-devices?) Linda A. Walsh
2013-09-03 10:54 ` Zdenek Kabelac [this message]
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