From: Josh Durgin <josh.durgin@dreamhost.com>
To: huang jun <hjwsm1989@gmail.com>
Cc: ceph-devel <ceph-devel@vger.kernel.org>
Subject: Re: workload balance
Date: Thu, 30 Jun 2011 11:04:21 -0700 [thread overview]
Message-ID: <4E0CBAA5.50804@dreamhost.com> (raw)
In-Reply-To: <BANLkTi=rSvuawL_VqVYZqpif=GEj+iivmQ@mail.gmail.com>
On 06/27/2011 05:25 PM, huang jun wrote:
> thanks，Josh
> By default，we set two replicas for each PG,so if we use ceph
> as back-end storage of a website, you know, some files will be frequently read,
> if then of thousands clients do this, some osd's workload will be very high.
> so in this circumstance, how to balance the whole cluster's workload?
If the files don't change often, they can be cached by the clients. If
there really is one object that is being updated and read frequently,
there's not much you can do currently. To reduce the load on the primary
OSD, we could add a flag to the MDS to tell clients to read from
replicas based on the usage.
Josh
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next prev parent reply other threads:[~2011-06-30 18:04 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-27 9:34 workload balance huang jun
2011-06-27 21:06 ` Josh Durgin
2011-06-28 0:25 ` huang jun
2011-06-30 18:04 ` Josh Durgin [this message]
2011-07-01 0:13 ` huang jun
2011-07-17 10:31 ` srimugunthan dhandapani
2011-07-19 14:39 ` Sage Weil
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