[Sheepdog] Sheepdog 0.3.0 schedule and 0.4.0 plan

Yibin Shen zituan at taobao.com
Tue Nov 15 09:50:58 CET 2011


On Tue, Nov 15, 2011 at 3:40 PM, Christoph Hellwig <hch at infradead.org> wrote:
> On Tue, Nov 15, 2011 at 11:05:33AM +0900, MORITA Kazutaka wrote:
>> Hi,
>>
>> I finished all of the cluster driver implementation we planed, so I
>> think of releasing 0.3.0 this weekend.  If you have pending patches
>> for 0.3.0, please send them until Nov 18th.  I'll spend this week
>> testing Sheepdog.
>>
>> The planned big features for 0.4.0 are as follows:
>>
>>  - add write-cache support
>>    http://lists.wpkg.org/pipermail/sheepdog/2011-October/001480.html
>
> That description sounds a bit odd.  I've started hacking support on
> a traditional writeback cache - that is data still gets written out
> using normal write on all storage nodes, but we can skip the O_SYNC
> flag.  Then the client sends a cache flush command and we do a syncfs
does this 'client' mean qemu block driver ?
my other question is , if we only bypass the O_SYNC flag,  and without
cache stored
at local disk(or memory),  so lots of read traffic maybe transfered
through network,
then how can we increase the read side performance?
so I think we can't discard the cache prefetch or read ahead support.
> system call on all nodes to make sure data is on stable store from
> .bdrv_co_flush.
>
> I've implemented the client side, and a local implementation of the
> cache flushing, but so far I've failed finding a way to forward it
> to each node that has an object for the given image exactly once.
>
> If you're interested I can send the current WIP patches for this out to
> the list.
we really appreciate it!
>
> --
> sheepdog mailing list
> sheepdog at lists.wpkg.org
> http://lists.wpkg.org/mailman/listinfo/sheepdog
>

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