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crush: new SET_CHOOSE_LEAF_TRIES command

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Explicitly control the number of sample attempts, and allow the number of
tries in the recursive call to be explicitly controlled via the rule. This
is important because the amount of time we want to spend looking for a
solution may be rule dependent (e.g., higher for the wide indep pool than
the rep pools).

(We should do the same for the other tunables, by the way!)

Reflects ceph.git commit c43c893be872f709c787bc57f46c0e97876ff681.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
This commit is contained in:
Ilya Dryomov 2013-12-24 21:19:26 +02:00
parent 4158608139
commit be3226acc5
2 changed files with 23 additions and 10 deletions
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2
include/linux/crush/crush.h
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@ -46,6 +46,8 @@ enum {
CRUSH_RULE_EMIT = 4, /* no args */
CRUSH_RULE_CHOOSE_LEAF_FIRSTN = 6,
CRUSH_RULE_CHOOSE_LEAF_INDEP = 7,
CRUSH_RULE_SET_CHOOSE_LEAF_TRIES = 9,
};
/*