[LU-12804] add llapi interface to FLDB for FID->target mapping Created: 25/Sep/19 Updated: 25/Sep/19 |
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| Status: | Open |
| Project: | Lustre |
| Component/s: | None |
| Affects Version/s: | None |
| Fix Version/s: | None |
| Type: | Improvement | Priority: | Minor |
| Reporter: | Andreas Dilger | Assignee: | WC Triage |
| Resolution: | Unresolved | Votes: | 0 |
| Labels: | None | ||
| Rank (Obsolete): | 9223372036854775807 |
| Description |
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It would be good to have a user interface for mapping FIDs to MDT/OST targets using the FID Location Database (FLDB). FLDB is available in memory on all clients, and in the fld.*.fldb file on the MDS. It might make sense to also add a fld.*.fldb file on the clients to facilitate this mapping (good for consistency with MDS, but problematic because it is not a "simple" file and would have to go into debugfs that is root only), or it could be an ioctl (easy to implement, but hard to run on the servers). |
| Comments |
| Comment by Alex Zhuravlev [ 25/Sep/19 ] |
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I was thinking of API to allow this lookup on the servers w/o local mount. that would be useful for hot pools. |