Red Hat Bugzilla – Bug 1292624
(RHEL6) Poor performance of sequential/streaming I/O over SMB
Last modified: 2016-03-01 01:13:31 EST
Please review the doc text and sign off to be included in 3.1.2 errata.
The text looks good to me.
I'd like Ira to verify it as well.
With this release, asynchronous IO from Samba to Gluster is supported and the AIO read option is enabled by default in smb.conf. This increases the throughput when the client is multithreaded or there are multiple programs accessing the same share.
It doesn't really impact us in the multiple client case.
71% perf improvement on writes and 100% improvement on reads, verified.
Note that with Linux clients we SHOULD NOT be using AIO, there are issues with the cifs kernel module that need to be addressed before we recommend AIO with linux cifs. AIO is recommended for Windows and is enabled by default.
1. By default in Samba it is set to 0.
We've changed our smb.conf in RHGS to set it to 4096.
2. Same value, we don't know what the client type is.
If you have Linux clients using SMB2+ you need to disable AIO, at current.
Looks good. Thanks.
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.