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From Donald Miner <>
Subject Re: Search
Date Wed, 23 Jul 2014 21:02:14 GMT

Can you explain the deadlock? Is it only if i have a cyclical trigger? Or is there something

Not trying to argue my constraint approach is a good idea. It it is a bad idea.  Just curious.

> On Jul 23, 2014, at 4:54 PM, Josh Elser <> wrote:
> 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
>> 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
>>>> 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
>>>>> on top of Accumulo once, but I don't recall seeing a nice package with
>>>>> 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 top
>>>> 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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