On 02/26/2015 09:02 AM, Haomai Wang wrote:
Hmm, we already obverse this duplicate omap keys set from pglog operations.
And I think we need to resolve it in upper layer, of course,
Can we resolve this higher up easily? I am struck that it might be
easier to simply do the coalescing here. I think this was the approach
Sam was advocating in the performance meeting?
coalescing omap operations in FileStore is also useful.
@Somnath Do you do this dedup work in KeyValueStore already?
On Thu, Feb 26, 2015 at 10:28 PM, Andreas Bluemle
<andreas.bluemle@xxxxxxxxxxx> wrote:
Hi,
during the performance weely meeting, I had mentioned
my experiences concerning the transaction structure
for write requests at the level of the FileStore.
Such a transaction not only contains the OP_WRITE
operation to the object in the file system, but also
a series of OP_OMAP_SETKEYS and OP_SETATTR operations.
Find attached a README and source code patch, which
describe a prototype for coalescing the OP_OMAP_SETKEYS
operations and the performance impact f this change.
Regards
Andreas Bluemle
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