Measuring Riak disk usage

Mark Phillips mark at
Wed Apr 10 13:32:28 EDT 2013

Oops. Looks like this is a duplicate (thanks, Mailman).

Here's the current thread:


On Tue, Apr 9, 2013 at 9:14 PM, chengas123 <benjamin.j.mccann at> wrote:
> Hi,
> I'm currently storing data in MongoDB and would like to evaluate Riak as an
> alternative. Riak is appealing to me because LevelDB uses Snappy, so I would
> expect it to take less disk space to store my data set than MongoDB which
> does not use compression. However, when I benchmarked it by inserting a few
> hundred thousand JSON records into each datastore, Riak in fact took far
> more disk space. I'm wondering if there's something I might be missing here
> as a newcomer to Riak. E.g. I checked the disk space used by running "du -ch
> /var/lib/riak/leveldb". Is this perhaps not a good way to check disk space
> usage because perhaps Riak/LevelDB preallocates files? (I know MongoDB does
> this and has a built-in db.collection.stats command to provide true disk
> usage information). Are there any other reasons why Riak might be taking
> more space or anything I could have screwed up?
> Thanks,
> Ben
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