From: Marcel Lauhoff <ml@irq0.org>
To: Robert LeBlanc <robert@leblancnet.us>
Cc: ceph-devel <ceph-devel@vger.kernel.org>
Subject: Re: OSD-Based Object Stubs
Date: Thu, 28 May 2015 11:45:12 +0200 [thread overview]
Message-ID: <877frtc9xz.fsf@irq0.org> (raw)
In-Reply-To: <CAANLjFriAw_RcWvkGBvt_2EwzicTQCF1ygymyDwbi8z4H-i3jQ@mail.gmail.com>
Robert LeBlanc <robert@leblancnet.us> writes:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA256
>
> At first I thought this was to allow the OSDs to stub the location of
> the real data after a CRUSH map change so that it didn't have to
> relocate the data right away (or at all) and reduce the number of map
> changes. Then I realized it was for cold storage tiering. Is the idea
> to be able to move data off to near-line storage like tape?
Yes, cold storage. Basically, let the OSD move data elsewhere like tape or some
archive system.
~marcel
--
Marcel Lauhoff
Mail/XMPP: ml@irq0.org
http://irq0.org
next prev parent reply other threads:[~2015-05-28 9:45 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-27 8:39 OSD-Based Object Stubs Marcel Lauhoff
2015-05-27 9:24 ` Haomai Wang
2015-05-27 16:37 ` Robert LeBlanc
2015-05-28 9:45 ` Marcel Lauhoff [this message]
2015-05-28 5:56 ` Gregory Farnum
2015-05-28 10:01 ` Marcel Lauhoff
2015-06-09 23:58 ` Gregory Farnum
2015-06-20 10:18 ` Marcel Lauhoff
2015-06-23 12:38 ` Gregory Farnum
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