os/bluestore: add multiple finishers to bluestore #10780
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- The single finisher of a bluestore can be a bottleneck when using an SSD as a backend device. If too much load is given to the single finisher, client-side IO latency increases. So we add multiple finishers to the bluestore, which shows better performance. - 'bluestore_shard_finishers' option is added to be able to configure wheather finsihers is multiple or not. - a finisher is selected according to the shard id of a sequencer. - the number of finishers is decided by osd_op_num_shards. Signed-off-by: Ilsoo Byun <ilsoo.byun@sk.com>
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retest this please |
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when using an SSD as a backend device. If too much load
is given to the single finisher, client-side IO latency
increases. So we add multiple finishers to the
bluestore, which shows better performance.
be able to configure wheather finsihers is multiple or
not.
sequencer.
osd_op_num_shards.
Signed-off-by: Ilsoo Byun ilsoo.byun@sk.com