.Split threshold is now randomized
Previously, the split threshold was not randomized, so that many OSDs reached it at the same time. As a consequence, such OSDs incurred high latency because they all split directories at once. With this update, the split threshold is randomized which ensures that OSDs split directories over a large period of time.
Description of problem:
[RFE] filestore: randomize split threshold
- If the distribution of files is roughly even, many osds will reach the split threshold at the same time, causing them all to incur high latency as they all split directories at once.
- A simple change that may mitigate this is to randomize the split threshold, similar to the randomized scrub threshold, so different osds split directories over a larger period of time.
For more information Please Check Bugzilla : https://bugzilla.redhat.com/show_bug.cgi?id=1291632 and specific comment#55 : https://bugzilla.redhat.com/show_bug.cgi?id=1332874#c55
Version-Release number of selected component (if applicable):
Red Hat Ceph Storage 1.3.2
BZ link mistake in comment#0 :
Upstream Feature tracker : http://tracker.ceph.com/issues/15835
*** Bug 1219974 has been marked as a duplicate of this bug. ***
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.