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From "Dave Marion (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-4328) Run multiple tablet servers on a single host
Date Sat, 04 Jun 2016 02:05:59 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-4328?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15315257#comment-15315257
] 

Dave Marion commented on ACCUMULO-4328:
---------------------------------------

bq. ...with the caveat that going from 1.6.x to 1.6.6 with this capability does not change
any behavior if the feature is not enabled. And that would include needing to modify a current
user script in any way.

I believe this to be the case, that you should not have to change anything.

bq. Random ports bother me. If there is an option to assign a port, or default to a random
one if you don't care, okay - if I can only use a random port, that seems to be a problem
if we try to be more container friendly as well as port blocking considerations.

I agree that random ports may be an issue, but its an issue that predates this JIRA. I feel
that if we are going to modify tserver.port.client to take a list or range of values instead
of 1 value for the purposes that have been stated, then that should be a separate JIRA. However,
for the purposes of this issue, if someone wants to use this feature, then they are also choosing
to deal with random ports.

bq. The big question that I have is, even if you could do this, would you want to?

I don't have any specific evidence to share, but in talking with [~kturner] he expressed an
interest in this feature. Maybe he can give more specifics. I will say that one way to scale
Accumulo is to add more tablet servers, and just because you have saturated one tablet server
does not mean that you have saturated the disk or network bandwidth of the host on which it's
running.

> Run multiple tablet servers on a single host
> --------------------------------------------
>
>                 Key: ACCUMULO-4328
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-4328
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: scripts, tserver
>            Reporter: Dave Marion
>            Assignee: Dave Marion
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> Modify scripts and necessary code to run multiple tablet servers on a single host.



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