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Posted to issues@crail.apache.org by "Animesh Trivedi (JIRA)" <ji...@apache.org> on 2018/07/26 08:08:00 UTC

[jira] [Created] (CRAIL-48) Make namenode polling dynamic

Animesh Trivedi created CRAIL-48:
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             Summary: Make namenode polling dynamic
                 Key: CRAIL-48
                 URL: https://issues.apache.org/jira/browse/CRAIL-48
             Project: Apache Crail
          Issue Type: Improvement
            Reporter: Animesh Trivedi


When the crail namenode is started with polling mode for RPCs, it stays there. May be we can add a timeout (along the lines : 30mins) for no-activity. When the no-activity timer expires, the namenode can go back to the blocking mode. As soon as the first request comes in, it can switch back again to the polling mode. This functionality can also be added using the ioctl interface.


This is helpful for running a crail cluster with data for long periods of time. Otherwise CPU cores are hammered for days and nights. 



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