t
> reads. So my point is, from the client?s perspective, it shouldn?t expect to
> read the content which hasn?t been successfully written to the storage. Thus
> it's ok for ceph to not support ordering the reads/writes from multiple
> clients.
>
> From: Cook, Nigel
> S
to not support ordering the reads/writes from multiple clients.
From: Cook, Nigel
Sent: Wednesday, December 10, 2014 12:37 PM
To: Wang, Zhiqiang
Cc: Josh Durgin; Yehuda Sadeh; Samuel Just; Sage Weil; Jason Dillaman;
ceph-devel
Subject: RE: rados read ordering
On thinking of the following use c
dnesday, December 10, 2014 12:37 PM
To: Wang, Zhiqiang
Cc: Josh Durgin; Yehuda Sadeh; Samuel Just; Sage Weil; Jason Dillaman;
ceph-devel
Subject: RE: rados read ordering
On thinking of the following use cases and the rbd client..
The ordering scenario is that with client a and b, assuming a and b ar
w...@vger.kernel.org
[mailto:ceph-devel-ow...@vger.kernel.org] On Behalf Of Sage Weil
Sent: Wednesday, December 10, 2014 8:43 AM
To: Cook, Nigel
Cc: Yehuda Sadeh; Josh Durgin; Samuel Just; Wang, Zhiqiang; Jason Dillaman;
ceph-devel
Subject: Re: rados read ordering
On Wed, 10 Dec 2014, Cook, Nigel wr
, 2014 10:26 AM
To: Wang, Zhiqiang
Cc: Sage Weil; Cook, Nigel; Yehuda Sadeh; Josh Durgin; Samuel Just; Jason
Dillaman; ceph-devel
Subject: Re: rados read ordering
On Wed, Dec 10, 2014 at 9:10 AM, Wang, Zhiqiang wrote:
> For multiple clients accessing the same volume, same object, I guess
> -Original Message-
> From: ceph-devel-ow...@vger.kernel.org
> [mailto:ceph-devel-ow...@vger.kernel.org] On Behalf Of Sage Weil
> Sent: Wednesday, December 10, 2014 8:43 AM
> To: Cook, Nigel
> Cc: Yehuda Sadeh; Josh Durgin; Samuel Just; Wang, Zhiqiang; Jason Dillaman;
&g
h-devel-ow...@vger.kernel.org
[mailto:ceph-devel-ow...@vger.kernel.org] On Behalf Of Sage Weil
Sent: Wednesday, December 10, 2014 8:43 AM
To: Cook, Nigel
Cc: Yehuda Sadeh; Josh Durgin; Samuel Just; Wang, Zhiqiang; Jason Dillaman;
ceph-devel
Subject: Re: rados read ordering
On Wed, 10 Dec 2014, C
On Wed, 10 Dec 2014, Cook, Nigel wrote:
> Folks
>
> I'm wondering if this is related to the question I posed a few days
> ago..
>
> Can CEPH support 2 clients simultaneously accessing a single volume -
> for example a database cluster - and honor read and write order of
> blocks across the mu
Folks
I'm wondering if this is related to the question I posed a few days ago..
Can CEPH support 2 clients simultaneously accessing a single volume - for
example a database cluster - and honor read and write order of blocks across
the multiple clients?
Can you comment?
Regards,
Nigel Cook +1
On 12/08/2014 09:03 AM, Sage Weil wrote:
The current RADOS behavior is that reads (on any given object) are always
processed in the order they are submitted by the client. This causes a
few headaches for the cache tiering that it would be nice to avoid. It
also occurs to me that there are likel
On Mon, Dec 8, 2014 at 9:03 AM, Sage Weil wrote:
> The current RADOS behavior is that reads (on any given object) are always
> processed in the order they are submitted by the client. This causes a
> few headaches for the cache tiering that it would be nice to avoid. It
> also occurs to me that
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