Hi Mark! On 01/25/2016 08:00 PM, Mark Seger wrote: > hey bernd, long time no chat. it turns out you don't have to know what > swift is because I've been able to demonstrate this behavior with a very > simple python script that simply creates files in a 3-tier hierarchy. the > third level directories each contain a single file which for my testing are > all 1K. So what is the script exactly doing? Does it create those files sequentially per dir or randomly between those dirs? Btw, I had been talking about that issue at linux plumbers in 2013 https://www.youtube.com/watch?v=N_bZOGZAb-Y > > I have played wiht cache_pressure and it doesn't seem to make a difference, > though that was awhlle ago and perhaps it is worth revisiting. one thing There are several patches from Mel Gorman in 3.11, which really made a difference for me. So unless you tested with >= 3.11 you should probably re-test. > you may get a hoot out of, being a collectl user, is I have an xfs plugin > that lets you look at a ton of xfs stats either in realtime or after the > fact just like any other collectl stat. I just havent' added it to the kit > yet. Hmm, I currently don't have good a test system for that. I'm working on an entirely different project now and while this is also a parallel file system, it does not have a linux file system in between, but has its own (log rotated) layout. Cheers, Bernd _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
