It appears that I wasn't reading things correctly. My 1000 requests/second number was for non-2XX responses. :(
Static file from local disk: 158 requests/second Joomla from local disk: ~50 requests/second Static file from AFS: 152 requests/second Joomla from AFS: 20-30 requests/second. --------------------------------------------------------------------------- Jason Edgecombe | Linux and Solaris Administrator UNC Charlotte | The William States Lee College of Engineering 9201 University City Blvd. | Charlotte, NC 28223-0001 Phone: 704-687-3514 jwedg...@uncc.edu | http://www.coe.uncc.edu --------------------------------------------------------------------------- If you are not the intended recipient of this transmission or a person responsible for delivering it to the intended recipient, any disclosure, copying, distribution, or other use of any of the information in this transmission is strictly prohibited. If you have received this transmission in error, please notify me immediately by reply e-mail or by telephone at 704-687-3514. Thank you. -----Original Message----- From: Steven Jenkins [mailto:steven.jenk...@gmail.com] Sent: Wednesday, September 08, 2010 6:53 PM To: Edgecombe, Jason Cc: openafs-info@openafs.org Subject: Re: [OpenAFS] Improving AFS performance for Joomla and other web sites On Wed, Sep 8, 2010 at 5:32 PM, Edgecombe, Jason <jwedg...@uncc.edu> wrote: > Hi everyone, > > > > We currently server our entire web tree out of AFS. This includes Joomla and > other PHP-based applications. While I was benchmarking our new server, I > noticed that the following rough performance numbers: > > > > Static files served from AFS: ~200 > requests per second > > Joomla home page served out of AFS: ~30 requests per > second > > Joomla home page served from local ext3: 1000 requests per second. > > > > I'm running a 8 cores with hyperthreading (16 threads). I'm running the > Apache threaded worker MPM on RHEL5.5 with mod_fcgid and OpenAFS 1.4.12.1. I > have Apache configured for ~1000 threads. > > > > My data (250GB) and stat cache for the AFS client should be big enough to > not have to hit the server. > > > > My afsd has the following options: " -fakestat -dynroot -chunksize 18 -stat > 500000 -daemons 32 -volumes 2000 -blocks 212713128" > > > > What is recommended to improve my AFS performance for Joomla? > Skipping past a lot of the usual caveats around performance in a complex system and going (somewhat) straight to the AFS-specific bits: 1- It would be very useful to also compare static files served from ext3 -- that can give you somewhat of a baseline (i.e., compare the ratio of static files in ext3 to Joomla in ext3 versus static files in AFS to Joomla in AFS). Offhand, the slowdown you're seeing between static files in AFS vs Joomla in AFS does not seem egregious (based on my experience tuning other web application servers, but not Joomla specifically). 2- To see if cache configuration is an issue, look at your hit/miss rates. You can use afsmonitor to look at that dynamically. 3- Depending on your ability to do further instrumentation, it would be very helpful to look at traffic between your web server and AFS servers (e.g., turn on audit logs) to see exactly what your web server is requesting from servers. Alternatively, you can capture packet traces with tcpdump/snoop/wireshark. Don't forget your pt and vlservers, by the way. I personally prefer packet traces, as I'm able to see oddities like bad addresses (and retries) that would not show up in server logs. Steven _______________________________________________ OpenAFS-info mailing list OpenAFS-info@openafs.org https://lists.openafs.org/mailman/listinfo/openafs-info
