On Nov 18, 2007 9:44 PM, Ernie Dipko <[EMAIL PROTECTED]> wrote: > > The speed that each tray operates at on the 6140, depends on the type of > disk installed in the tray. I am pretty sure that all of the 10K disks only > allow the tray to operate at 2Gb/s.
That does not make sense. I thought the NVRAM cache on the raid controllers (2 x 2G) is the buffer zone. I thought the raid controller writes to disk asynchronously. > > Information can be found in the Hardware Installation manual. > http://dlc.sun.com/pdf/819-7497-11/819-7497-11.pdf > Ernie > > > > > adrian cockcroft wrote: > So you may be maxing out a single controller at 2Gbits/s, which would > give you about this level of performance. Are you sure that the > HBA-SAN-6140 datapath is actually running at 4Gbit/s as you stated? > > Adrian > > On 11/17/07, Asif Iqbal <[EMAIL PROTECTED]> wrote: > > > Without attachment since 40K is max. > > Looks like 194MB/s is max I can write on zpool on controller c6 > > > iostat -xnMCez 10 10 > extended device statistics ---- errors --- > r/s w/s Mr/s Mw/s wait actv wsvc_t asvc_t %w %b s/w h/w > trn tot device > 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3 0 0 1 0 0 1 c0 > 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3 0 0 1 0 > 0 1 c0t0d0 > 1.1 4.4 0.0 0.3 0.0 0.5 0.1 87.0 0 2 0 0 0 0 c1 > 0.5 2.0 0.0 0.1 0.0 0.2 0.1 88.3 0 1 0 0 > 0 0 c1t0d0 > 0.5 2.4 0.0 0.1 0.0 0.3 0.0 85.8 0 1 0 0 > 0 0 c1t1d0 > 328.3 349.8 12.0 14.4 0.0 33.3 0.0 49.1 0 350 86 0 0 86 c6 > > [...9 more instances..] > > cat iostat.txt | grep -w c6 > > 0.1 1877.8 0.0 190.5 0.0 682.5 0.0 363.5 0 3677 86 0 > 0 86 c6 > 0.0 1453.5 0.0 132.6 0.0 509.2 0.0 350.3 0 2562 86 0 > 0 86 c6 > 0.7 1817.3 0.0 189.9 0.0 907.4 0.0 499.1 0 3643 86 0 > 0 86 c6 > 0.0 1483.8 0.0 138.0 0.0 514.9 0.0 347.0 0 2686 86 0 > 0 86 c6 > 0.8 1467.2 0.0 138.5 0.0 669.9 0.0 456.3 0 2672 86 0 > 0 86 c6 > 0.4 1812.5 0.0 193.3 0.0 979.5 0.0 540.3 0 3735 86 0 > 0 86 c6 > 0.5 1487.6 0.0 140.2 0.0 506.2 0.0 340.2 0 2747 86 0 > 0 86 c6 > 0.4 1480.1 0.0 140.7 0.0 742.1 0.0 501.3 0 2718 86 0 > 0 86 c6 > 0.3 1862.8 0.0 194.2 0.0 882.5 0.0 473.6 0 3755 86 0 > 0 86 c6 > > > > ---------- Forwarded message ---------- > From: Asif Iqbal <[EMAIL PROTECTED]> > Date: Nov 17, 2007 5:00 PM > Subject: Re: [perf-discuss] zpool io to 6140 is really slow > To: adrian cockcroft <[EMAIL PROTECTED]> > Cc: [EMAIL PROTECTED], perf-discuss@opensolaris.org, > [EMAIL PROTECTED] > > > Looks like max IO write I get is ~ 194MB/s on controller c6, where the > zpool is on > > > On Nov 17, 2007 3:29 PM, adrian cockcroft <[EMAIL PROTECTED]> > wrote: > > > > What do you get from iostat? Try something like > > % iostat -xnMCez 10 10 > > (extended, named, Mbyte, controller, errors, nonzero, interval 10 > secs, 10 measurements) > > Post the results and you may get more commentary... > > Adrian > > > On 11/17/07, Asif Iqbal <[EMAIL PROTECTED]> wrote: > > > (Including storage-discuss) > > I have 6 6140s with 96 disks. Out of which 64 of them are Seagate > ST3300007FC (300GB - 10000 RPM FC-AL) > > I created 16k seg size raid0 luns using single fcal disks. Then > created a zpool with 8 4+1 raidz1 using those luns, out of single > disks. Also set the zfs nocache flush to `1' to > take advantage of the 2G NVRAM cache of the controllers. > > I am using one port per controller. Rest of them are down (not in > use). Each controller port > speed is 4Gbps. > > All luns have one controller as primary and second one as secondary > > I am getting only 125MB/s according to the zpool IO. > > I should get ~ 512MB/s per IO. > > Also is it possible to get 2GB/s IO by using the leftover ports of the > controllers? > > Is it also possible to get 4GB/s IO by aggregating the controllers (w/ > 8 ports totat)? > > > > On Nov 16, 2007 5:30 PM, Asif Iqbal <[EMAIL PROTECTED]> wrote: > > > I have the following layout > > A 490 with 8 1.8Ghz and 16G mem. 6 6140s with 2 FC controllers using > A1 anfd B1 controller port 4Gbps speed. > Each controller has 2G NVRAM > > On 6140s I setup raid0 lun per SAS disks with 16K segment size. > > On 490 I created a zpool with 8 4+1 raidz1s > > I am getting zpool IO of only 125MB/s with zfs:zfs_nocacheflush = 1 in > /etc/system > > Is there a way I can improve the performance. I like to get 1GB/sec IO. > > Currently each lun is setup as primary A1 and secondary B1 or vice versa > > I also have write cache eanble according to CAM > > -- > Asif Iqbal > PGP Key: 0xE62693C5 KeyServer: pgp.mit.edu > > > > -- > Asif Iqbal > PGP Key: 0xE62693C5 KeyServer: pgp.mit.edu > _______________________________________________ > perf-discuss mailing list > perf-discuss@opensolaris.org > > > > -- > > Asif Iqbal > PGP Key: 0xE62693C5 KeyServer: pgp.mit.edu > > > > -- > Asif Iqbal > PGP Key: 0xE62693C5 KeyServer: pgp.mit.edu > _______________________________________________ > perf-discuss mailing list > perf-discuss@opensolaris.org > > > _______________________________________________ > perf-discuss mailing list > perf-discuss@opensolaris.org > > > > -- Asif Iqbal PGP Key: 0xE62693C5 KeyServer: pgp.mit.edu _______________________________________________ perf-discuss mailing list perf-discuss@opensolaris.org
