Re: [Gluster-devel] Asking about Gluster Performance Factors

[John Mark Walker]

Hi Ethan,

----- Original Message ----- 

> Dear Gluster Dev Team :

> I'm Ethan, Assistant engineer in Samsung electronics. Reviewing your
> paper, I have some questions of performance factors in gluster.

Which paper? Can you provide a link? 

Also, please note that this is a community mailing list, and we cannot 
guarantee quick response times here - if you need a fast response, I'm happy to 
put you through to the right people.

Thanks,
John Mark Walker
Gluster Community Guy


> First, what does it mean the option "performance.cache-*"? Does it
> mean read cache? If does, what's difference between the options
> "prformance.cache-max-file-size" and "performance.cache-size" ?
> I read your another paper("performance in a gluster system, versions
> 3.1.x") and it says as below on Page 12,
> (Gluster Native protocol does not implement write caching, as we
> believe that the modest performance improvements from rite caching
> do not justify the risk of cache coherency issues.)

> Second, how much is the read throughput improved as configuring 2-way
> replication? we need any statistics or something like that.
> ("performance in a gluster system, versions 3.1.x") and it says as
> below on Page 12,
> (However, read throughput is generally improved by replication, as
> reads can be delivered from either storage node)

> I would ask you to return ASAP.