Eric Newton created ACCUMULO-2757:
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Summary: zookeeper watches
Key: ACCUMULO-2757
URL: https://issues.apache.org/jira/browse/ACCUMULO-2757
Project: Accumulo
Issue Type: Improvement
Components: client, master, tserver
Environment: very large clusters
Reporter: Eric Newton
I recently learned how to get the number of watches in a zookeeper node.
{noformat}
$ echo wchp | nc localhost 2181
{noformat}
There are a surprising number of watches supporting table configuration. A
single tserver accumulo instance with one data table is using 872 watches.
Large clusters, even with many zookeepers, can have millions of watches.
We may need to watch a single notification node, or serialize the table configs
into a single node per table. That would accomplish ACCUMULO-1568, too.
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