accumulo-notifications mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Eric Newton (JIRA)" <>
Subject [jira] [Created] (ACCUMULO-2757) zookeeper watches
Date Tue, 29 Apr 2014 18:32:17 GMT
Eric Newton created ACCUMULO-2757:

             Summary: zookeeper watches
                 Key: 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.

$ echo wchp | nc localhost 2181

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.

This message was sent by Atlassian JIRA

View raw message