yeah, I've got the same explanation 10 min ago.
PR is ready too:
https://github.com/ceph/ceph/pull/12447
On 12.12.2016 20:39, Sage Weil wrote:
On Fri, 9 Dec 2016, Somnath Roy wrote:
Sage,
Please find it in the following location , it's a zipped file.
https://drive.google.com/open?id=0B7W-S0z_ymMJd0V1XzVhQWR4ak0
What I found that the following shard length always comes below bluestore_extent_map_shard_min_size and triggering reshard.
2016-12-08 20:07:56.950527 7fe9140f7700 20 bluestore.extentmap(0x557183546d48) update shard 0x3ff000 is 25 bytes (was 25) from 1 extents
All of the instances are at offset 0x3ff000, which is right at the end of
the object. I think we just need some special case code to handle when
the last little bit ends up being small, and pull it into the previous
shard (probably).
sage
Thanks & Regards
Somnath
-----Original Message-----
From: Sage Weil [mailto:sweil@xxxxxxxxxx]
Sent: Thursday, December 08, 2016 5:00 PM
To: Somnath Roy
Cc: ceph-devel
Subject: Re: Reshard is not stabilizing in latest master
On Thu, 8 Dec 2016, Somnath Roy wrote:
Sage,
I am seeing reshard is not stabilizing even after I precondition an image with 4K seq. It was happening with 2 weeks old master. Anything change on that part of the code base recently ? Otherwise I need to debug.
Nope. If you have a cluster where it isn't stabilizing just turn on debug bluestore = 20 for a minute and send me the log.
sage
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