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From keith-turner <...@git.apache.org>
Subject [GitHub] accumulo pull request #110: ACCUMULO-4328: Run multiple tablet servers per h...
Date Tue, 07 Jun 2016 14:50:12 GMT
Github user keith-turner commented on a diff in the pull request:

    https://github.com/apache/accumulo/pull/110#discussion_r66085575
  
    --- Diff: docs/src/main/asciidoc/chapters/administration.txt ---
    @@ -479,40 +479,22 @@ With very powerful nodes, it may be beneficial to run more than
one TabletServer
     node. This decision should be made carefully and with much deliberation as Accumulo is
designed
     to be able to scale to using 10's of GB of RAM and 10's of CPU cores.
     
    -To run multiple TabletServers on a single host, it is necessary to create multiple Accumulo
configuration
    -directories. Ensuring that these properties are appropriately set (and remain consistent)
are an exercise
    -for the user.
    +To run multiple TabletServers on a single host you will need to change the +NUM_TSERVERS+
property
    +in the accumulo-env.sh file from 1 to the number of TabletServers that you want to run.
On NUMA
    +hardware, with numactl installed, the TabletServer will interleave its memory allocations
across
    +the NUMA nodes and the processes will be scheduled on all the NUMA cores without restriction.
To
    +change this behavior you can uncomment the +TSERVER_NUMA_OPTIONS+ example in accumulo-env.sh
and
    +set the numactl options for each TabletServer.
     
     Accumulo TabletServers bind certain ports on the host to accommodate remote procedure
calls to/from
    -other nodes. This requires additional configuration values in +accumulo-site.xml+:
    +other nodes. Running more than one TabletServer on a host requires that you set the following
    +properties to zero in +accumulo-site.xml+:
    --- End diff --
    
    You could replace the following line with the xml that needs to be pasted into accumulo-site.xml.
 


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