Re: [Gluster-users] Tiered volume performance degrades badly after a volume stop/start or system restart.

2018-02-01 Thread Jeff Byers
The problem was simple, the sqlite3 DB connection parameters were only being set on a newly created DB, not when there was an existing DB. Apparently the sqlite3 DB default parameters are not ideal. Patch is in the Bug: 1540376 On Thu, Feb 1, 2018 at 9:32 AM, Jeff Byers wrote: > This problem appe

Re: [Gluster-users] Tiered volume performance degrades badly after a volume stop/start or system restart.

2018-02-01 Thread Jeff Byers
This problem appears to be related to the sqlite3 DB files that are used for the tiering file access counters, stored on each hot and cold tier brick in .glusterfs/.db. When the tier is first created, these DB files do not exist, they are created, and everything works fine. On a stop/start or ser

Re: [Gluster-users] Tiered volume performance degrades badly after a volume stop/start or system restart.

2018-01-30 Thread Vlad Kopylov
Tested it in two different environments lately with exactly same results. Was trying to get better read performance from local mounts with hundreds of thousands maildir email files by using SSD, hoping that .gluster file stat read will improve which does migrate to hot tire. After seeing what yo

[Gluster-users] Tiered volume performance degrades badly after a volume stop/start or system restart.

2018-01-30 Thread Jeff Byers
I am fighting this issue: Bug 1540376 – Tiered volume performance degrades badly after a volume stop/start or system restart. https://bugzilla.redhat.com/show_bug.cgi?id=1540376 Does anyone have any ideas on what might be causing this, and what a fix or work-around might be? Thanks! ~ Jeff