Bug 1292624
| Summary: | (RHEL6) Poor performance of sequential/streaming I/O over SMB | ||
|---|---|---|---|
| Product: | [Red Hat Storage] Red Hat Gluster Storage | Reporter: | Michael Adam <madam> |
| Component: | samba | Assignee: | rhs-smb <rhs-smb> |
| Status: | CLOSED ERRATA | QA Contact: | Ben Turner <bturner> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | high | ||
| Version: | rhgs-3.1 | CC: | asriram, asrivast, byarlaga, gdeschner, ira, madam, nlevinki, rcyriac, rhs-smb, sankarshan, sbhaloth, storage-qa-internal |
| Target Milestone: | --- | Keywords: | ZStream |
| Target Release: | RHGS 3.1.2 | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | samba-4.2.4-10.el6rhs | Doc Type: | Bug Fix |
| Doc Text: |
With this release, asynchronous I/O from Samba to Red Hat Gluster Storage is supported. The 'aio read size' option is now set to 4096, which enables asynchronous I/0 for reads by default. This increases the throughput when the client is multithreaded or there are multiple programs accessing the same share.
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Story Points: | --- |
| Clone Of: | 1284870 | Environment: | |
| Last Closed: | 2016-03-01 06:13:31 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 1284870 | ||
| Bug Blocks: | 1260783 | ||
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Comment 6
Anjana Suparna Sriram
2016-02-05 10:14:08 UTC
The text looks good to me. I'd like Ira to verify it as well. My suggestion: 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. -Ira 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. https://rhn.redhat.com/errata/RHBA-2016-0324.html |