Hi Lew, thanks a lot for this quick crosscheck! Lew Wolfgang wrote:
FWIW we also have a requirement to write lots of data. We use systems with SuperMicro X10DRH-iT motherboards, AVAGO (LSI) MegaRAID SAS 9361-8i RAID controllers, and two RAID-6 arrays consisting of eleven-each 6T Seagate ST6000NM0095 spinning drives configured with two dedicated hot-swap spares, in 4U SuperMicro chassis. We also use a two-SSD RAID-1 mirror for the operating system, running from the same RAID controller.
We normally write thousands of 4-GB files and get about 1.6-GB/sec write rates, but I just set up a test writing 1-TB worth of 1-MB files and got a rate of about 1.5-GB/sec.
1.5GB/s is what bonnie++ reports for my set, too. Might be overoptimistic, but it definitely writes 500-600MB/s over hours.
I then sorted the files into nine directories and timed a "rm -r" on the lot and got 33.7-seconds.
Yes, that's about where I would like to end up. Even the 2min I got on the HDD RAID would be OK...
Is there a way for you to test hardware RAID?
Not easily. The machine is (almost) permanently loaded with data, so I have to wait for good moments if I want to change the configuration. Apart from that, we (well, it was before my time at the institute) got bitten by a HW RAID failure (broken card) where data was inaccessible using 'normal' methods. I'd have to convince my colleagues :) Pit -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org