Hi Shri, On Thu, Oct 10, 2013 at 1:31 PM, Shrinand Javadekar <shrin...@maginatics.com > wrote:
> Thanks for the inputs Chuck. Please see my responses inline. > > > On Thu, Oct 10, 2013 at 7:56 AM, Chuck Thier <cth...@gmail.com> wrote: > >> Hi Shri, >> >> I think your observations are fairly spot on. Here are a couple of >> thoughts/comments. >> >> 1. I wonder if you are maxing out how much your client can push at 128 >> threads. If you were to increase the number threads (or number of clients) >> for the higher container counts, you could get more transactions through. >> > > [SJ] In this experiment I simply wanted to see how sharding across > containers helps gives the same input data rate. I will run some numbers > with higher number of threads to see what's the max number of operations > per second I can get. > Cool > > >> >> 2. Cloudfiles rate limits PUTs at 100 per second to a single container. >> This helps ensure fairly consistent performance to a single container. We >> also put our container data on SSD drives to help drive better performance. >> So your max theoretical performance is 100xNUM_CONTAINERS PUTs/sec. >> > > [SJ] Great to know about the SSDs and the rate limits. Is it also possible > to know what version of Swift has been deployed at Rackspace Cloudfiles? > We stay pretty close to master. I'm working on a different project at Rackspace now, so I don't know what exact version we are running right now. > > >> 3. It would be worthwhile to test even larger containers to test how >> much container size affects performance. I don't think your sample size is >> large enough. >> > > [SJ] Yeah, especially with SSDs, this is definitely not a large enough > sample. I guess, I should start at 1M and go upto 10M or so. > Or even 100M :) > Will keep you'll posted. > > -Shri > Cool, I look forward to it :) -- Chuck
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