[Bugs] [Bug 1438706] Sharding: Fix a performance bug

bugzilla at redhat.com bugzilla at redhat.com
Thu Jun 8 13:25:23 UTC 2017


https://bugzilla.redhat.com/show_bug.cgi?id=1438706

Krutika Dhananjay <kdhananj at redhat.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Doc Type|If docs needed, set a value |Bug Fix


--- Doc Text *updated* ---
Previously, a bug in shard's in-memory cache invalidation in STAT fop was causing it to send lots of LOOKUPs as part of cache-invalidation, even when the file was not undergoing any modification. As a consequence, every STAT call from the application is followed by a LOOKUP, leading to a sub-optimal performance of I/O operations on the VMs. With this fix, in-memory cache invalidation in shard's STAT operation was corrected. Now, in a pure-read workload, there was not as many LOOKUPs as the number of STATs, leading to improved VM performance. This also benefited performance in mixed read-write workload from the VMs.


-- 
You are receiving this mail because:
You are on the CC list for the bug.
Unsubscribe from this bug https://bugzilla.redhat.com/token.cgi?t=KRYkzySYnX&a=cc_unsubscribe


More information about the Bugs mailing list