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From Ted Malaska <ted.mala...@cloudera.com>
Subject Re: HBase and Accumulo
Date Wed, 19 Aug 2015 18:37:35 GMT
Sorry Type-o

So there might be issues when you pass the Quadrillion.  But Like I said
never ran into that issue of region limits.

On Wed, Aug 19, 2015 at 2:29 PM, Ted Malaska <ted.malaska@cloudera.com>

> Sorry 10 billion a day so that is 7 Trillion records.  So many issues
> around 1000 Trillion
> On Wed, Aug 19, 2015 at 2:28 PM, Ted Malaska <ted.malaska@cloudera.com>
> wrote:
>> 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 <josh.elser@gmail.com> 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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