From: Marian Csontos <mcsontos@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 12:06:19 +0200 [thread overview]
Message-ID: <5225B49B.6050904@redhat.com> (raw)
In-Reply-To: <521871FD.8000700@mglug.de>
On 08/24/2013 10:42 AM, Oliver Rath wrote:
> 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.
Buffers may be more relevant metric as the I/O among snapshots is
"shared" on block device level.
I am using thin snapshots rather heavily (in VMs) and buffers are using
13 GB of total 32 GB RAM on the machine (and it is not running@full
load now)
Are you using FS on top of the thin devices?
-- Martian
>
> 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?
>
> Tfh!
> Oliver
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@redhat.com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>
next prev parent reply other threads:[~2013-09-03 10:06 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 [this message]
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 ` [linux-lvm] howto speed-up thinpool-devices? Zdenek Kabelac
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