I have just completed extensive benchmarking on 2.6.31.2 and 2.6.24 with a new benchmark program I have written, to measure real-world io performance in high load situations where readers and writers are compeeting.
I am looking at HW RAID setups as well a normal single harddrive situations. The bottom line is that on a single harddrive only data=writeback with cfq scheduler has decent performance when readers and writers are in competition and even then, there will be huge outliers of many seconds happeing every now and then. See http://insights.oetiker.ch/linux/fsopbench/ for details. cheers tobi -- Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland http://it.oetiker.ch [email protected] ++41 62 775 9902 / sb: -9900 -- Heavy Disk I/O harms desktop responsiveness https://bugs.launchpad.net/bugs/131094 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
