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From Josh Elser <>
Subject Re: Search
Date Wed, 23 Jul 2014 20:54:06 GMT
Constraints execute server-side.

It might work to write to an external system but it's still bogus for 
proper lifecycle methods on cleanup inside Accumulo. Writing to Accumulo 
within a constraint is still deadlock prone, as well.

On 7/23/14, 4:51 PM, Donald Miner wrote:
> We thought about this for text indexing. We found we could use Constraints as they trigger
on write. Seems like a bit of a hack and i have no idea if it would blow something up.
> Does constraint execution happen on tablet side or client side?
>> On Jul 23, 2014, at 4:39 PM, Roshan Punnoose <> wrote:
>> Is there a way to tie into the write process in Accumulo? Maybe just use an
>> Iterator that worked on compaction to send data to blur/solr? I have seen
>> something similar in Cassandra, a data hook to save data in Solr.
>>> On Fri, Jul 18, 2014 at 6:46 PM, Nehal Mehta <> wrote:
>>> We were trying to do so, but adding visibility while adding/searching
>>> documents needs lot more thinking. Adding visibility to core search engine
>>> needs changes to algorithm and that does not make it very scalable.
>>> Integration besides granular visibility is very doable. and we had taken
>>> inspiration from Solandra.
>>> Obviously if we can get it done it adds lot of value. I believe Sqrrl
>>> people have already done it, are they thinking to open source it anytime in
>>> future?
>>> On Thu, Jul 17, 2014 at 3:09 PM, Donald Miner <>
>>> wrote:
>>>> We briefly toyed with blur on accumulo but didnt get too far just because
>>>> it was obe. I think that would be cool.
>>>>> On Jul 17, 2014, at 3:06 PM, Josh Elser <>
>>>>> It's definitely possible. I remember hearing about someone doing lucene
>>>> on top of Accumulo once, but I don't recall seeing a nice package with a
>>>> bow on top.
>>>>>> On 7/17/14, 2:53 PM, THORMAN, ROBERT D wrote:
>>>>>> What lexical search package (like lucene/solr) has anyone put on
>>> of
>>>> accumulo?  Is this possible or does everyone just index log files and
>>>> documents?
>>>>>> v/r
>>>>>> Bob Thorman
>>>>>> Principal Big Data Engineer
>>>>>> AT&T Big Data CoE
>>>>>> 2900 W. Plano Parkway
>>>>>> Plano, TX 75075
>>>>>> 972-658-1714

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