es-translog

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translog(事务日志)
flush

Each shard has a transaction log or write ahead log associated with it.
It allows to guarantee that when an index/delete operation occurs,
it is applied atomically, while not "committing" the internal Lucene index for each request.
A flush ("commit") still happens based on several parameters:

index.translog.flush_threshold_ops
After how many operations to flush. Defaults to unlimited.
index.translog.flush_threshold_size
Once the translog hits this size, a flush will happen. Defaults to 512mb.
index.translog.flush_threshold_period
The period with no flush happening to force a flush. Defaults to 30m.
index.translog.interval
How often to check if a flush is needed, randomized between the interval value and 2x the interval value. Defaults to 5s.
index.gateway.local.sync
How often the translog is fsynced to disk. Defaults to 5s.

es-translog

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原文地址：http://www.cnblogs.com/water-sky/p/4408857.html