mirror of
https://github.com/honeymoose/OpenSearch.git
synced 2025-02-07 05:28:34 +00:00
29 lines
1.2 KiB
Plaintext
29 lines
1.2 KiB
Plaintext
[[index-modules-translog]]
|
|
== Translog
|
|
|
|
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:
|
|
|
|
[cols="<,<",options="header",]
|
|
|=======================================================================
|
|
|Setting |Description
|
|
|index.translog.flush_threshold_ops |After how many operations to flush.
|
|
Defaults to `5000`.
|
|
|
|
|index.translog.flush_threshold_size |Once the translog hits this size,
|
|
a flush will happen. Defaults to `200mb`.
|
|
|
|
|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`.
|
|
|=======================================================================
|
|
|
|
Note: these parameters can be updated at runtime using the Index
|
|
Settings Update API (for example, these number can be increased when
|
|
executing bulk updates to support higher TPS)
|