[LU-1598] Bypass OI lookup in osd_fid_lookup() if it's for file creation Created: 04/Jul/12 Updated: 27/Sep/12 Resolved: 27/Sep/12 |
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| Status: | Resolved |
| Project: | Lustre |
| Component/s: | None |
| Affects Version/s: | Lustre 2.3.0 |
| Fix Version/s: | Lustre 2.3.0 |
| Type: | Bug | Priority: | Minor |
| Reporter: | Liang Zhen (Inactive) | Assignee: | Liang Zhen (Inactive) |
| Resolution: | Fixed | Votes: | 0 |
| Labels: | None | ||
| Rank (Obsolete): | 4557 |
| Description |
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It's unnecessary to call osd_oi_lookup() in osd_fid_lookup if it's a file creation because FID shouldn't never be re-used so we expect it to be not existed, which means we can bypass overhead of OI lookup at here, if it's really a duplicate FID from unexpected reasons, we should be able to detect it later while calling do_create->osd_oi_insert(). |
| Comments |
| Comment by Alex Zhuravlev [ 04/Jul/12 ] |
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look at the recent FanYong's patches - one of them introduces NEW flag on the server side and basically skip OI lookup for new files in some cases. |
| Comment by Liang Zhen (Inactive) [ 04/Jul/12 ] |
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patch is here: http://review.whamcloud.com/3269 |
| Comment by Liang Zhen (Inactive) [ 04/Jul/12 ] |
Yes, my patch is using this flag |
| Comment by Jodi Levi (Inactive) [ 27/Sep/12 ] |
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Please let me know if this ticket needs to be reopened. |