Hi Shri, Thanks for paying attention to it, Please find my answers below:-
On Tue, Apr 22, 2014 at 2:31 AM, Shrinand Javadekar <[email protected] > wrote: > Sumit, > > I realize that you had sent out a similar email sometime ago about > performance degradation. I'm not sure if anyone has run these types of > long running experiments with jclouds. So this may be a first. > Tried to debug it in last 2 weeks without success. Want to understand more how jclouds code handle this use case or any pointers that this is a problematic use case would help > > The 409 status is returned because of a conflict [1]. Are you sure you > didn't have two or more threads trying to delete the same object? > No two threads share the same object key in my programme (String key = "objkey" + UUID.randomUUID();). It is some kind of race between PUT and DEL call . If I put say 10 ms sleep between call then there is no 409 error. > Also, I see that that 409 is returned by Swift if you try to delete a > container that isn't empty[2]. Is that something your test code > could've tried? > I am trying to delete objects .. not containers. > > When you say there was a similar test you're trying with curl, are you > using the curl command-line utility or the libcurl library? curl command in shell script with for loops. > How are > you specifying the number of threads to use and what object each > thread should get/put/delete? > It is a java test programme using ThreadPoolExecutor. Somthing similiar as here http://www.javacodegeeks.com/2013/01/java-thread-pool-example-using-executors-and-threadpoolexecutor.html Object is a 5KB file. with key = "objkey" + UUID.randomUUID(); with Pool of 10 threads. Hope this would give a good inside. Let me know if you get any problem here. > > Thanks. > -Shri > > [1] http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html > [2] https://bugs.launchpad.net/horizon/+bug/1096084 > > On Sun, Apr 20, 2014 at 5:55 PM, Sumit Gaur <[email protected]> wrote: > > Hi > > I using jclouds lib integrated with Openstack Swift+ keystone > combinaiton. > > Things are working fine except stability test. After 20-30 hours of test > > jclouds/SWIFT start degrading in TPS and keep going down over the time. > > > > 1) I am running the (PUT-GET-DEL) cycle in 10 parallel threads. > > 2) I am getting a lot of 409 and DEL failure for the as response too from > > SWIFT. > > 3) Direct similiar test from curl does not show much impact and TPS > remain > > constant. > > > > Can sombody help me wht is going wrong here ? > > > > Thanks > > sumit >
