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From Keith Turner <>
Subject Re: [VOTE] accumulo-1.4.0-incubating RC5
Date Fri, 23 Mar 2012 23:08:12 GMT

I have been experimenting with RC5 and running continuous ingest. I
noticed it was not keeping much data in memory.  When a tablet server
had lots of tablets it was writing out really small files.  I tracked
down the cause of this, the walog max size is set to 100M.  Also a
tablet will compact after it has 3 walogs.  In effect this limits the
tablet server to 300M of memory even though its configured to use 1G.

The files in <acumulo>/conf/examples all set the walog to 100M.
These config changes were made late in the game after a lot of testing
was done.  While these configs may be good for running accumulo on a
laptop, none of them are good for running on a cluster w/ reasonable
nodes.  I want to see 1.4 released, but I also want user to have a
good experience out of the box. That is why I am voting -1 on this.
We should provide the config that we tested with as an example which
is good for servers.


On Fri, Mar 23, 2012 at 12:52 PM, Eric Newton <> wrote:
> Please vote on releasing the following candidate as Apache Accumulo version
> 1.4.0.
> The src tar ball was generated by exporting :
> To build the dist tar ball from the source run the following command :
>  src/assemble/
> Tarballs, checksums, signatures:
> Maven Staged Repository:
> SVN tag:
> Keys:
> Changes:
> The vote will be held open for the next 72 hours.
> The following changes were made between RC2 and RC5
>  * Graduation: removed 'incubating' from tag
>  * Change cast of FileSystem to support MapR
>  * Fixed deadlock recovering root tablet
>  * Fixed slow memory leak in tablet servers
>  * Added Snappy support
>  * Fixed wikisearch against unindexed fields
>  * Removed duplicate methods in IteratorSettings
>  * Reduced the debugging level in for the examples
>  * Updated LICENSE and NOTICE
>  * Simple examples sources jar moved from incorrect location

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