Re: [infinispan-dev] range query in Infinispan !!
On 14 May 2012 17:40, Prabhat Jha <pjha(a)redhat.com> wrote:
I have not used Infinispan's Query or Map/Reduce functionalities
yet
because of them not being in JDG yet.
I see but even assuming we would start something new, it will likely
take longer for it to eventually get into JDG compared to Query or
Map/Reduce.
Yes, we can use those to get what
I have mentioned. Query should be more straight forward and simpler than
M/R I think. But Query has dependency on Lucene and I have experienced
great pain in the past when using Lucene and FileSystem for shared storage.
Well Infinispan solves that problem, no shared filesystems ;)
https://github.com/infinispan/infinispan/blob/master/lucene-directory/src...
BTW cool that you have experience with it.. feel to start working more
on this area?
My perspective is a bit different. I am arguing for a
"simpler" solution
for a problem that I find to be very common. Similar to how in
Cassandra, you can easily query based on a time range and the order you
want.
I'm all for simplicity, but.. Cassandra is column oriented, so it can
do some more tricks.. have you thought how this could be implemented
on a distributed key value store like Infinispan?
Unless you have a really neat idea, I'm not sure how simple that could be.
On 05/14/2012 11:05 AM, Sanne Grinovero wrote:
> why "not using Query" ?
>
> Such features are available in core using Map/Reduce; I don't think
> that different approaches should be provided by core otherwise, there
> is enough complexity in there...
>
> Cheers,
> Sanne
>
> On 14 May 2012 16:58, Prabhat Jha<pjha(a)redhat.com> wrote:
>> Hi,
>>
>> In QuickTweet we needed a way to get most recent x tweets for a user or
>> on a topic. Currently we are implementing it by keeping entries in the
>> cache and updating a bounded FIFO queue in parallel. However, to get
>> most recent data or data for a given time range is a very common use
>> case specially in social media applications. It would be good to see
>> this range feature available in out of box (not using Query) in upcoming
>> Infinispan releases. Thoughts?
>>
>> I can get it started by creating a Jira unless I hear otherwise.
>>
>> Regards,
>> Prabhat
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