Re: Provide more documentation for MDS performance tuning on large file systems

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My current settings are:

mds           advanced  mds_beacon_grace 15.000000

True. I might as well remove it completely, it's an artefact of earlier experiments.


This should be a global setting. It is used by the mons and mdss.

mds           basic     mds_cache_memory_limit 4294967296
mds           advanced  mds_cache_trim_threshold 393216
global        advanced  mds_export_ephemeral_distributed true
mds           advanced  mds_recall_global_max_decay_threshold 393216
mds           advanced  mds_recall_max_caps 30000
mds           advanced  mds_recall_max_decay_threshold 98304
mds           advanced  mds_recall_warning_threshold 196608
global        advanced  mon_compact_on_start true

I haven't had any noticeable slow downs or crashes in a while with 3
active MDS and 3 hot standbys.
Thanks for sharing the settings that worked for you.

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