[LUDOC-472] Add new OSS write through cache parameters Created: 29/May/20 Updated: 02/Feb/21 Resolved: 18/Dec/20 |
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| Status: | Resolved |
| Project: | Lustre Documentation |
| Component/s: | None |
| Affects Version/s: | None |
| Fix Version/s: | Lustre 2.14.0 Manual |
| Type: | Improvement | Priority: | Minor |
| Reporter: | Andreas Dilger | Assignee: | Andreas Dilger |
| Resolution: | Fixed | Votes: | 0 |
| Labels: | None | ||
| Issue Links: |
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| Rank (Obsolete): | 9223372036854775807 | ||||||||
| Description |
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Section 39.4.3.1. Using OSS Read Cache does not contain the recently-added parameters from LI-12071 LU-12071 osd-ldiskfs: bypass pagecache if requested
in few cases (non-rotational drive, by request, or file size)
osd-ldiskfs may want to skip caching. If so, bypass page cache
instead of later cache invalidation, as cache invalidation can
be quite expensive.
set the maximum cached read/write IO size use:
lctl set_param osd-ldiskfs.*.readcache_max_io_mb=N
lctl set_param osd-ldiskfs.*.writethrough_max_io_mb=N
The default maximum cached IO size is 8MiB.
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| Comments |
| Comment by Andreas Dilger [ 18/Dec/20 ] |
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Patch https://review.whamcloud.com/40819 " |