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From "Koushik Das (JIRA)" <>
Subject [jira] [Created] (CLOUDSTACK-6740) Direct agent command throttling improvements
Date Wed, 21 May 2014 12:29:38 GMT
Koushik Das created CLOUDSTACK-6740:

             Summary: Direct agent command throttling improvements
                 Key: CLOUDSTACK-6740
             Project: CloudStack
          Issue Type: Bug
      Security Level: Public (Anyone can view this level - this is the default.)
          Components: Management Server
    Affects Versions: 4.5.0
            Reporter: Koushik Das
            Assignee: Koushik Das
             Fix For: 4.5.0

List of changes:

1. Create a separate thread pool for handling cron tasks. Currently normal and cron tasks
are all handled by the same direct agent thread pool.
2. For normal tasks (generated as part of user/admin API calls), if throttle limit reached
then tasks will be queued up for subsequent execution. This will avoid uncertainty as to when
a certain command pass/fail based on the throttling. For now the queue is unbounded but this
needs to be revisited. One possibility is to change the agent state to something appropriate,
based on the queue limit, so that commands are sent to this host from the upper layers of
3. For cron tasks (internally generated by MS like ping, VM sync etc.), if throttle limit
reached then it will be rejected. Since these are internally generated these can be rejected
without any issues.

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