I've been thinking about this some more -- resource management in the
tabletservers is definitely a concern, even if deadlock isn't (I still
haven't convinced myself one way or another).
Difficulty will definitely arise in trying to make sure you don't leak
BatchWriters (and the thread it spawns inside which sends mutationst o
the appropriate tserver). Not impossible, but definitely tricky :)
On 4/26/14, 2:38 PM, Donald Miner wrote:
I haven't actually implemented this, just what we've been thinking
about. But yeah, the idea is that you write using BatchWriter in the
check method of Constraint.
On Sat, Apr 26, 2014 at 9:58 AM, BlackJack76 <[email protected]
<mailto:[email protected]>> wrote:
Donald,
Thanks for the response. Sounds like we are exactly on the same page.
Honestly, I wasn't familiar with Constraints until you mentioned
them. I
did some quick reading about them and still trying to understand how
you are
accomplishing this. This is a very interesting idea and I
appreciate that
you shared it.
I am assuming you are writing back to the table from the check method in
your Constraint. How are you writing back to the table? Through a
BatchWriter?
I also thought about creating some sort of external buffer but agree
that it
would be a lot of extra work and book keeping.
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*
*Donald Miner
Chief Technology Officer
ClearEdge IT Solutions, LLC
Cell: 443 799 7807
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