eLevelDB max_open_files in 1.2.0

Mark Phillips mark at basho.com
Tue Aug 14 13:34:10 EDT 2012

Hi Dave,

On Sun, Aug 12, 2012 at 3:58 PM, Dave Brady <dbrady at weborama.com> wrote:
> Hello,
> First I want to thanks Basho for greatly expanding the documentation on the Wiki for configuring/tuning Riak and eLevelDB in 1.2.0!  Big improvement over 1.1.x.
> My question is about max_open_files: here the documentation is confusing to me.
> It says to allocate one open file per 2 MB, then divide by the number of partitions.  This is the same formula used in 1.1.x.
> It goes on to say that if you manually set this parameter in 1.1.x, to divide that value by two for 1.2.0.
> Should not the formula for 1.2.0, in that case, read as use one file per 4 MB?

Long story short, the answer is "yes" :)

With 1.2, 4MB is the advised file size, and you should be running with
no less that 20 files/nodes. I'll take a pass at updating the docs to
make this a bit easier to understand. Thanks for pointing that out.


> Thankks!
> --
> Dave Brady
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