Aurélien Bouteiller wrote:
> From a pretty old experiment I made, compression was giving good
> results on 10Mbps network but was actually decreasing RTT on 100Mbs
> and more. I played with all the zlib settings from 1 to 9, and
> actually even the low compression setting was unable to reach
From a pretty old experiment I made, compression was giving good
results on 10Mbps network but was actually decreasing RTT on 100Mbs
and more. I played with all the zlib settings from 1 to 9, and
actually even the low compression setting was unable to reach decent
performance. I don't belie
Actually, even in this particular condition (over internet)1
compression make sense only for very specific data. The problem is
that usually the compression algorithm is very expensive if you want
to really get a interesting factor of size reduction. And there is the
tradeoff, what you save
On Apr 24, 2008, at 8:26 AM, Tomas Ukkonen wrote:
Yes, you are probably right that its not worth the effort in general
and
especially not in HPC environments where you have very fast network.
But I can think of (rather important) special cases where it is
important
- non HPC environments
George Bosilca wrote:
> The paper you cited, while presenting a particular implementation
> doesn't bring present any new ideas. The compression of the data was
> studied for long time, and [unfortunately] it always came back to the
> same result. In the general case, not worth the effort !
>
> Now
Jeff Squyres wrote:
> On Apr 22, 2008, at 9:03 AM, Tomas Ukkonen wrote:
>
>> I read from somewhere that OpenMPI supports
>>
>> some kind of data compression but I couldn't find
>> any information about it.
>>
>> Is this true and how it can be used?
>>
> Nope, sorry -- not true.
>
> This jus
The paper you cited, while presenting a particular implementation
doesn't bring present any new ideas. The compression of the data was
studied for long time, and [unfortunately] it always came back to the
same result. In the general case, not worth the effort !
Now of course, if one limit i
On Apr 22, 2008, at 9:03 AM, Tomas Ukkonen wrote:
I read from somewhere that OpenMPI supports
some kind of data compression but I couldn't find
any information about it.
Is this true and how it can be used?
Nope, sorry -- not true.
This just came up in a different context, actually. We ad
