steveloughran commented on a change in pull request #802: HADOOP-16279.
S3Guard: Implement time-based (TTL) expiry for entries …
URL: https://github.com/apache/hadoop/pull/802#discussion_r291155194
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File path:
hadoop-common-project/hadoop-common/src/main/resources/core-default.xml
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@@ -1502,12 +1502,11 @@
</property>
<property>
- <name>fs.s3a.metadatastore.authoritative.dir.ttl</name>
- <value>3600000</value>
+ <name>fs.s3a.metadatastore.metadata.ttl</name>
+ <value>15m</value>
<description>
- This value sets how long a directory listing in the MS is considered as
- authoritative. The value is in milliseconds.
- MetadataStore should be authoritative to use this configuration knob.
+ This value sets how long a metadata in the MS is valid. The value is in
Review comment:
text only makes sense for us developers.
"This value sets how long an entry in the MetadataStore is considered valid.
After this time has expired, in non-authoritative mode, S3Guard will check the
S3 store for the existence/state of an object and use that as its source of
truth.
This is needed when other applications are writing/updating
data in the samme store without going through S3Guard."
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