increasing concurrency （with -c）should boost write performance. 发自我的 iPhone
在 2011-12-16，11:20，Rustam Aliyev <rus...@code.az> 写道： > Hi, > > I'm testing swift 1.4.4 setup with 4 nodes/zones on RHEL 5.7. I ran into the > problem of slow writes. Using swift-bench we generated load, writing hundreds > of 4K files. Results: > - Writes - ~3 PUTs/sec (very slow) > - Reads - ~25 GETs/sec (ok) > > It's clear that writes are not limited by I/O. To prove that, I increased > file size to 8K, 32K and 64K. In all cases, even with 64K, I had same result > - 3 PUTs/sec. > > In the logs of the object servers I can see that each PUT operation actually > took around 0.3 sec which is inline with 3 PUTs/ sec reported by swift-bench. > > Is that expected performance for such small cluster? Can I break down those > 0.3 seconds spent for PUT operation to see where's bottleneck? > > Any advice for troubleshooting this is welcome. > > Regards, > Rustam. > > _______________________________________________ > Mailing list: https://launchpad.net/~openstack > Post to : openstack@lists.launchpad.net > Unsubscribe : https://launchpad.net/~openstack > More help : https://help.launchpad.net/ListHelp _______________________________________________ Mailing list: https://launchpad.net/~openstack Post to : openstack@lists.launchpad.net Unsubscribe : https://launchpad.net/~openstack More help : https://help.launchpad.net/ListHelp
