Josh Elser created ACCUMULO-4411:
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Summary: HDFS block caches are not dynamically resized on
configuration change.
Key: ACCUMULO-4411
URL: https://issues.apache.org/jira/browse/ACCUMULO-4411
Project: Accumulo
Issue Type: Improvement
Components: tserver
Reporter: Josh Elser
I noticed that the graph for Data Block Cache was constantly at zero, despite
me changing the configuration and ensuring that it was enabled for the metadata
table. Upon looking at the configuration, I saw that I configured it to 256
(bytes) instead of 256MB. After using the Accumulo shell to change the
configuration, the cache was not immediately used. After I restarted the
tservers, then the cache was used.
We should try to find a way to dynamically resize the caches on the fly to
avoid the need of restarting all tabletservers.
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