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From Ted Malaska <>
Subject Re: HBase and Accumulo
Date Wed, 19 Aug 2015 18:28:10 GMT
I've been doing HBase for a long time and never had an issue with region
count limits and I have clusters with 10s of billions of records.  Many
there would be issues around a couple Trillion records, but never got that
high yet.

Ted Malaska

On Wed, Aug 19, 2015 at 2:24 PM, Josh Elser <> wrote:

> Oh, one other thing that I should mention (was prompted off-list).
> (definition time since cross-list now: HBase regions == Accumulo tablets)
> Accumulo will handle many more regions than HBase does now due to a
> splittable metadata table. While I was told this was a very long and
> arduous journey to implement correctly (WRT splitting, merges and bulk
> loading), users with "too many regions" problems are extremely few and far
> between for Accumulo.
> I was very happy to see effort/design being put into this in HBase. And,
> just to be fair in criticism/praises, HBase does appear to me to do
> assignments of regions much faster than Accumulo does on a small cluster
> (~5-10 nodes). Accumulo may take a few seconds to notice and reassign
> tablets. I have yet to notice this with HBase (which also could be due to
> lack of personal testing).
> Jerry He wrote:
>> Hi, folks
>> We have people that are evaluating HBase vs Accumulo.
>> Security is an important factor.
>> But I think after the Cell security was added in HBase, there is no more
>> real gap compared to Accumulo.
>> I know we have both HBase and Accumulo experts on this list.
>> Could someone shred more light?
>> I am looking for real gap comparing HBase to Accumulo if there is any so
>> that I can be prepared to address them. This is not limited to the
>> security
>> area.
>> There are differences in some features and implementations. But they don't
>> see like real 'gaps'.
>> Any comments and feedbacks are welcome.
>> Thanks,
>> Jerry

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