From: Josh Durgin <josh.durgin@inktank.com>
To: James Harper <james.harper@bendigoit.com.au>,
"ceph-devel@vger.kernel.org" <ceph-devel@vger.kernel.org>
Subject: Re: ceph and scsi reservation-like locking
Date: Mon, 30 Dec 2013 13:43:14 -0800 [thread overview]
Message-ID: <52C1E8F2.6060107@inktank.com> (raw)
In-Reply-To: <6035A0D088A63A46850C3988ED045A4B68567948@BITCOM1.int.sbss.com.au>
On 12/28/2013 06:34 PM, James Harper wrote:
> Is the rbd locking feature-compatible with scsi3 persistent reservations?
It wasn't designed with scsi-3 exactly in mind, but using exclusive
locks and fencing might suffice.
To fence a client, you'd get its address from rbd_list_lockers() and
blacklist it with the 'ceph osd blacklist add' command, which can be
done via rados_mon_command() these days.
Blacklisting adds an entry in the osdmap so osds return an error when
blacklisted clients try to access them. By default a blacklist entry
expires after 1 hour.
> To use ceph as a storage backend for a Hyper-V cluster directly (rather than through an iscsi gateway), it looks like I'll need a virtual scsi3 device that supports persistent reservations.
I'm not sure exactly what parts of persistent reservations Hyper-V
relies on - let us know how it goes!
Josh
prev parent reply other threads:[~2013-12-30 21:44 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-29 2:34 ceph and scsi reservation-like locking James Harper
2013-12-30 21:43 ` Josh Durgin [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=52C1E8F2.6060107@inktank.com \
--to=josh.durgin@inktank.com \
--cc=ceph-devel@vger.kernel.org \
--cc=james.harper@bendigoit.com.au \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.