2021年5月21日(金) 12:26 Satoru Takeuchi <satoru.takeuchi(a)gmail.com>om>:
2021年5月18日(火) 14:09 Satoru Takeuchi <satoru.takeuchi(a)gmail.com>om>:
2021年5月18日(火) 9:23 Satoru Takeuchi <satoru.takeuchi(a)gmail.com>om>:
Hi,
I have a Ceph cluster used for RGW and RBD. I found that all I/Os to
RGW seemed to be
blocked while dynamic resharding. Could you tell me whether this
behavior is by design or not?
I attached a graph which means I/O seemed to be blocked. Here x-axis
is time and y-axis
is the number of RADOS objects. In addition, dynamic resharding was
run between 16:22:30 and 16:31:30.
I uploaded my image to google photos (thank you Anthony to point it out).
Can someone please answer this question? I can show you more detailed information if
desired.
I submitted an issue for this problem.
https://tracker.ceph.com/issues/50945
Thanks,
Satoru
>
>>
>>
>>
https://photos.app.goo.gl/ZFJg7CQ4z6gfqmSX6
>>
>> >
>> > I read the official documents about dynamic resharding. But there is
>> > no description about blocking during dynamic resharding.
>> >
>> >
https://docs.ceph.com/en/octopus/radosgw/dynamicresharding/
>> >
>> > In addition, I read the following Red Hat's blog post.
>> >
>> >
https://www.redhat.com/ja/blog/ceph-rgw-dynamic-bucket-sharding-performance…
>> >
>> > > You do not need to stop reading or writing objects to the bucket while
resharding is happening.
>> >
>> > It would mean the dynamic resharding is online operation. However,
>> > it's not clear whether this feature blocks I/Os or not.
>> >
>> > Thanks,
>> > Satoru