Hi Cephers,
We're in the middle of trying to triage the issue with ceph cluster
running 0.80.9 which was reported by Songbo and seeking for you experts'
advices.
In fact, per our testing the process of stopping an working OSD and
starting it again will lead to a huge performance downgrade.
Hi all,
When an osd is started, I will get a lot of slow requests from the
corresponding osd log, as follows:
2015-10-26 03:42:51.593961 osd.4 [WRN] slow request 3.967808 seconds
old, received at 2015-10-26 03:42:47.625968:
osd_repop(client.2682003.0:2686048 43.fcf
Hi all,
When an osd is started, I will get a lot of slow requests from the
corresponding osd log, as follows:
2015-10-26 03:42:51.593961 osd.4 [WRN] slow request 3.967808 seconds
old, received at 2015-10-26 03:42:47.625968:
osd_repop(client.2682003.0:2686048 43.fcf
Hi all,
When an osd is started, relative IO will be blocked.
According to the test result,the larger iops the clients send , the
longer it will take to elapse.
Adjustment on all the parameters associate with recovery operations was
also found useless.
How to reduce the impact of this process
