Hello, i'm getting unexpected results benchmarking our new storages bandwidth running XFS in a DRBD RAID 1 over Ethernet. The two peers are connected via DRBD 8.3 on Debian Wheezy x64. I'm running Fio 2.0.8 The hardware is a hybrid RAID10 on an adaptec 71605Q. Build of 2x 3TB Seagate Conestellation CS SED and 2x Samsung 840 500GB. My jobfile: [global] disable_lat=1 disable_clat=1 disable_slat=1 clat_percentiles=0 direct=1 buffered=0 create_on_open=1 [randrw] filename=rand.fio rw=randrw size=1g runtime=180 stonewall [randwrite] filename=rand.fio rw=randwrite size=1g runtime=180 stonewall [seqwrite] filename=seq.fio rw=write size=2g runtime=180 stonewall [dualseqwrite] filename=seq.fio rw=write size=2g numjobs=2 runtime=180 stonewall [seqread] filename=seq.fio rw=read size=2g runtime=180 stonewall I'm only measuring the bandwidth. The results on the device without drbd are like this: Randrw: 5564kb/s Randrwr: 5575kb/s Randw: 4520kb/s Write: 74266kb/s Dualwrite thread1: 44761kb/s Dualwrite thread2: 44497kb/s Read: 74619kb/s The moment I start DRBD and set the node to primary the highest result is 500-700kb/s on every test. I tried various performance improving tweaks and even asynchronous sync for drbd. Is there any way that these results emerge through the combination of fio and drbd? kind regards Tim Rohwedder -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
