Octane2 example RAID speed...

Ian Mapleson · *nix forums addict Joined: 29 Apr 2005 Posts: 54

Dear All,

Merely for information purposes only, though those who need disk speed
might
be interested in some performance results for a JBOD RAID I just sorted
out
for someone, in this case optimised for dealing with uncompressed PAL
video.

System was a dual-600 V12, PCI cage, dual-port U2W QLA1280.

RAID unit was an ERA dual-chanel PSU hotswap (blah blah), with 8 x 73GB
10K SCAs, 547GB total useable.

Here's the command sequence a diskperf output (dunno if the HTML tags
will make this easier to read; hope so):

<PRE>
octane 1# hinv
2 600 MHZ IP30 Processors
CPU: MIPS R14000 Processor Chip Revision: 2.4
FPU: MIPS R14010 Floating Point Chip Revision: 0.0
Main memory size: 1024 Mbytes
Xbow ASIC: Revision 1.4
Instruction cache size: 32 Kbytes
Data cache size: 32 Kbytes
Secondary unified instruction/data cache size: 2 Mbytes
Integral SCSI controller 0: Version QL1040B (rev. 2), single ended
Disk drive: unit 1 on SCSI controller 0
Integral SCSI controller 1: Version QL1040B (rev. 2), single ended
Integral SCSI controller 2: Version QL1280, low voltage differential
Disk drive: unit 1 on SCSI controller 2
Disk drive: unit 2 on SCSI controller 2
Disk drive: unit 3 on SCSI controller 2
Disk drive: unit 4 on SCSI controller 2
Integral SCSI controller 3: Version QL1280, low voltage differential
Disk drive: unit 1 on SCSI controller 3
Disk drive: unit 2 on SCSI controller 3
Disk drive: unit 3 on SCSI controller 3
Disk drive: unit 4 on SCSI controller 3
IOC3/IOC4 serial port: tty1
IOC3/IOC4 serial port: tty2
IOC3/IOC4 serial port: tty3
IOC3/IOC4 serial port: tty4
IOC3/IOC4 serial port: tty5
IOC3/IOC4 serial port: tty6
IOC3/IOC4 serial port: tty7
IOC3/IOC4 serial port: tty8
IOC3 parallel port: plp1
Graphics board: V12
Integral Fast Ethernet: ef0, version 1, pci 2
Fast Ethernet: ef1, version 1, pci 0
Fast Ethernet: ef2, version 1, pci 1
Fast Ethernet: ef3, version 1, pci 2
Fast Ethernet: ef4, version 1, pci 3
Iris Audio Processor: version RAD revision 12.0, number 1
octane 2# diskalign -n video -r1327104 -a16k
'/dev/dsk/dks[p0,2,3]d[1-4]s7' | tee /var/tmp/xlv.script
octane 3# xlv_make < /var/tmp/xlv.script
octane 4# mkfs -b size=16384 /dev/xlv/video
octane 5# mkdir /video
octane 6# mount /dev/xlv/video /video
octane 7# cd /video
octane 8# mkfile 2000m testfile
octane 9# diskperf -W -D testfile
#---------------------------------------------------------
# Disk Performance Test Results Generated By Diskperf V1.2
#
# Test name : Unspecified
# Test date : Fri May 5 07:04:19 2006
# Test machine : IRIX64 octane 6.5 10060437 IP30
# Test type : XFS striped data subvolume
# Test path : testfile
# Disk striping : group=8 unit=324
# Request sizes : min=1327104 max=268431360
# Parameters : direct=1 time=10 scale=1.000 delay=0.000
# XFS file size : 2097152000 bytes
#---------------------------------------------------------
# req_size fwd_wt fwd_rd bwd_wt bwd_rd rnd_wt rnd_rd
# (bytes) (MB/s) (MB/s) (MB/s) (MB/s) (MB/s) (MB/s)
#---------------------------------------------------------
1327104 144.37 145.41 137.83 90.23 123.12 86.45
2654208 148.57 149.76 145.58 114.40 146.13 111.84
5308416 150.82 152.29 149.92 129.48 149.65 129.60
10616832 151.80 153.53 151.22 140.10 151.36 141.30
21233664 152.06 154.10 152.06 147.57 152.04 147.97
42467328 151.59 154.36 152.36 151.29 152.36 151.60
84934656 150.44 154.34 152.46 152.83 152.56 153.14
169869312 148.07 154.21 152.47 153.38 152.47 153.45
</PRE>

Also, StoneWire speed test reports 120fps (143MB/sec).

Looks like the system is maxing out the buses. Will test a dual-port
U160
(2X faster peak b/w) in a week or so. With any luck it'll push over
200.

Cheers! :)

Ian.

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