Hi Matt,
This feature is expected to run in the massive tiny file storage
situation, and there are some further designs to reduce the overhead
when the file is not tiny,
(1) The migration is done asynchronously with the subsequent read/write
(v3);
(2) Avoid migration when the inline data length be zero, that will
capture some situations to almost eliminate the migration overhead (v4);
(3) It could be implicitly turned off at mount time by client (v4);
(4) It could be turned off globally by configuring the mds(v4).
v4 is coming soon.
Cheers,
Li Wang
On 11/30/2013 01:01 AM, Matt W. Benjamin wrote:
Hi,
I wondered about this. Were you able to measure an effect?
Thanks,
Matt
----- "Zheng Yan" <ukernel@xxxxxxxxx> wrote:
Besides, this feature should be disabled by default because it's not
compatible with old clients and it imposes overhead on the mds. we
need to use a config option or directory attribute to enable it.
Regards
Yan, Zheng
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