[infinispan-dev] Integration between HotRod and OGM

[Mircea Markus]

On Jan 27, 2014, at 2:02 PM, Pedro Ruivo <pedro at infinispan.org> wrote:

> On 01/27/2014 01:38 PM, Dan Berindei wrote:
>> 
>> 
>> 
>> On Mon, Jan 27, 2014 at 2:43 PM, Pedro Ruivo <pedro at infinispan.org
>> <mailto:pedro at infinispan.org>> wrote:
>> 
>> 
>> 
>>    On 01/27/2014 12:26 PM, Emmanuel Bernard wrote:
>>> I'd be curious to see performance tests on Pedro's approach (ie walk
>>> through the entire data key set to find the matching elements of
>>    a given
>>> group). That might be fast enough but that looks quite scary
>>    compared to
>>> a single lookup.
>> 
>>    I would prefer to have a performance hit than a map of sets (group name
>>    => set of keys). I also think that keep this map synchronized with the
>>    keys in data container will not be easy...
>> 
>> 
>> Sure, I would prefer the simpler implementation as well. But if changing
>> an application to use groups instead of atomic maps will change the
>> processing time of a request from 1ms to 1s, I'm pretty sure users will
>> prefer to keep use the atomic maps :)
> 
> you don't need to change the application. we can implement the 
> AtomicHashMap interface on top of grouping :D
> 
> I'm expecting a negative performance impact but not that high. Also, 
> with the current implementation, FGAHM performs a copy for writing... 
> anyway, we should test and see how it goes :)

+1. We can keep both around for a while and only drop FGAM iff grouping does the job right.

Cheers,
-- 
Mircea Markus
Infinispan lead (www.infinispan.org)