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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-3000) Allow use of existing ZK service in MiniAccumuloCluster
Date Tue, 21 Apr 2015 05:05:59 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-3000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14504334#comment-14504334
] 

ASF GitHub Bot commented on ACCUMULO-3000:
------------------------------------------

Github user joshelser commented on a diff in the pull request:

    https://github.com/apache/accumulo/pull/29#discussion_r28750299
  
    --- Diff: minicluster/src/main/java/org/apache/accumulo/minicluster/MiniAccumuloConfig.java
---
    @@ -108,6 +108,19 @@ public MiniAccumuloConfig setZooKeeperStartupTime(long zooKeeperStartupTime)
{
       }
     
       /**
    +   * Configure an existing ZooKeeper instance to use. Calling this method is optional.
If not set, a new ZooKeeper instance is created.
    +   *
    +   * @param existingZooKeepers
    +   *          Connection string for a already-running ZooKeeper instance
    +   *
    +   * @since 1.7.0
    +   */
    +  public MiniAccumuloConfig setExistingZooKeepers(String existingZooKeepers) {
    --- End diff --
    
    > I am really curious about the performance impact.
    
    Looking at some [Jenkins logs](https://secure.penguinsinabox.com/jenkins/job/Accumulo-Master-Integration-Tests/ws/test/target/mini-tests/org.apache.accumulo.test.ConditionalWriterIT_testBasic/logs/),
it looks like starting ZK and waiting for it to come up takes ~3seconds (time on first ZK
log msg compared to time on first tserver log msg). More quantitative measurements would be
cool to collect as well.


> Allow use of existing ZK service in MiniAccumuloCluster
> -------------------------------------------------------
>
>                 Key: ACCUMULO-3000
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3000
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: mini
>    Affects Versions: 1.5.1, 1.6.0
>            Reporter: Josh Elser
>            Assignee: Trent Nadeau
>            Priority: Minor
>              Labels: newbie
>             Fix For: 1.8.0
>
>
> A test harness may have already started ZooKeeper for other testing. MiniAccumuloCluster
could use that same ZooKepeer instance, instead of creating its own, but it is currently not
possible given what MAC does now.



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