Hi all,
I have a T2000 with four 500GB SATA disks. I want all storage in one
big pool, so I used the LSI HW RAID to do RAID0 stripes on two sets of two,
then zfs to mirror the two resultant volumes into one 1TB pool. The control
LDom is OpenSolaris 2009.06.
Next I made a 900GB sparse zvol for backing store for my new Solaris 10
u7 LDom and added it as a vdisk. I started the Solaris 10 LDom and began an
install, choosing ZFS as the root filesystem. It obliged and moved on to the
phase where the installer creates the / filesystem and it's been there for a
long time, with the disk lights flashing happily. I got bored waiting, so I
logged into the control domain and checked for errors, none:
r...@metsavahi~[66]12:16#iostat -En
c7t2d0 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
Vendor: LSILOGIC Product: Logical Volume Revision: 3000 Serial No:
Size: 1000.08GB <1000081457152 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
c6t0d0 Soft Errors: 0 Hard Errors: 9 Transport Errors: 0
Vendor: SONY Product: CD-RW CRX841E Revision: 1V3H Serial No:
Size: 0.00GB <0 bytes>
Media Error: 0 Device Not Ready: 9 No Device: 0 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
c7t0d0 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
Vendor: LSILOGIC Product: Logical Volume Revision: 3000 Serial No:
Size: 1000.08GB <1000081457152 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
Then I ran iostat to see how the devices were performing:
extended device statistics
r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b device
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 ramdisk1
0.0 84.0 0.0 3984.1 0.0 2.8 0.0 33.0 0 96 c7t2d0
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 c6t0d0
0.0 82.0 0.0 3876.1 0.0 2.2 0.0 26.4 0 74 c7t0d0
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
allika.colo:/jritorto
extended device statistics
r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b device
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 ramdisk1
0.0 79.0 0.0 4020.1 0.0 2.8 0.0 35.6 0 96 c7t2d0
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 c6t0d0
0.0 81.0 0.0 4208.1 0.0 1.8 0.0 22.5 0 64 c7t0d0
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
allika.colo:/jritorto
extended device statistics
r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b device
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 ramdisk1
0.0 78.0 0.0 3827.4 0.0 2.7 0.0 34.0 0 98 c7t2d0
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 c6t0d0
0.0 76.0 0.0 3639.4 0.0 2.1 0.0 27.6 0 70 c7t0d0
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
allika.colo:/jritorto
extended device statistics
r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b device
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 ramdisk1
0.0 64.0 0.0 3232.4 0.0 2.7 0.0 42.9 0 99 c7t2d0
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0 c6t0d0
0.0 66.0 0.0 3392.4 0.0 1.8 0.0 27.0 0 56 c7t0d0
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
allika.colo:/jritorto
That's pretty sad -- consistently well under 5MB/sec and a pretty significant
'busy' metric. I'm used to seeing disks like these exceed 100 MB/sec. Where
do I begin digging to find out what's making this so slow?
--
This message posted from opensolaris.org
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