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librgw: comment rgw_nfs config_ops.h tunables

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Signed-off-by: Matt Benjamin <mbenjamin@redhat.com>
This commit is contained in:
Matt Benjamin 2016-02-01 12:56:32 -05:00
parent 48c0f5b438
commit 303f542055
1 changed files with 9 additions and 0 deletions
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9
src/common/config_opts.h
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@ -1201,6 +1201,15 @@ OPTION(rgw_thread_pool_size, OPT_INT, 100)
OPTION(rgw_num_control_oids, OPT_INT, 8)
OPTION(rgw_num_rados_handles, OPT_U32, 1)
/* The following are tunables for caches of RGW NFS (and other file
* client) objects.
*
* The file handle cache is a partitioned hash table
* (fhcache_partitions), each with a closed hash part and backing
* b-tree mapping. The number of partions is expected to be a small
* prime, the cache size something larger but less than 5K, the total
* size of the cache is n_part * cache_size.
*/
OPTION(rgw_nfs_lru_lanes, OPT_INT, 5)
OPTION(rgw_nfs_lru_lane_hiwat, OPT_INT, 911)
OPTION(rgw_nfs_fhcache_partitions, OPT_INT, 3)