Manual Reference Pages - MOGILEFS::REPLICATIONPOLICY::MULTIPLEHOSTS (3)
MogileFS::ReplicationPolicy::MultipleHosts -- default replication policy
This policy tries to put files onto devices which are on different
hosts. If you only have 1 host and 2 devices on that one host, it
obviously cant, so itll grudgingly put it on the same host. But
if you request a minimum replica count of 2 and have 3 devices, itll
put 2 copies on different hosts. If you have 4 devices on 2 hosts,
and request a minima replica count of 3, youll get 3 copies on
different devices, but two of those devices will be on the same host,
and thats considered acceptable, since you have multiple hosts
covered at least.
|perl v5.20.3 ||MOGILEFS::REPLICATIONPOLICY::MULTIPLEHOSTS (3) ||2013-10-30 |
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