Hi all,
I am playing with setting for backfill to try to find how to control the speed
of backfill.
Now I only find "osd max backfills" can have effect the backfill speed. But
after all pg need to be backfilled begin backfilling I can't find any way to
speed up backfills.
Especailly when it comes to the last pg to recover, the speed is only a few
MB/s(when there are multi pg are backfilled the speed could be more than
600MB/s in my test)
I am a little confused about the setting of backfills and recovery.Though
backfilling is a kind of recovery but It seems recovery setting is only about
to replay pg logs to do recover pg.
Would change "osd recovery max active" or other recovery setting have any
effect on backfilling?
I did tried "osd recovery op priority" and "osd recovery max active" with no
luck.
Any advice would be greatly appreciated.Thanks
2018-01-11
lin.yunfan
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