From: Rebstock, Roland (Roland.Rebstock@usi.net)
Date: Fri May 13 2005 - 13:48:23 EDT
All, I have a SUNFIRE V880 with 4x1.05Ghz Processors 8GB of RAM and 12
73GB Fiber Attached HardDrives. I have built a 5 Column Stripe with a
1024 StripeWidth. Im running some bench tests and it seems that Im at a
barrier of 96MB/s on reads. The server has Solaris 8 with Veritas
Volume Mananger 3.2 and I have vxtuned with the following below. Anyone
have any other ideas on how to get faster performance from the reads?
The drives are Ultra 360's. I have been using "dd" and "iozone" for my
benchmarking. I would think that I could get more I/O throughput.
msuawo0m:> ./vxtunefs /oragroup0
Filesystem i/o parameters for /oragroup0
read_pref_io = 1048576
read_nstream = 5
read_unit_io = 1048576
write_pref_io = 1048576
write_nstream = 5
write_unit_io = 1048576
pref_strength = 20
buf_breakup_size = 33553920
discovered_direct_iosz = 1073741824
max_direct_iosz = 33553920
default_indir_size = 8192
qio_cache_enable = 1
write_throttle = 495616
max_diskq = 1073741824
initial_extent_size = 8
max_seqio_extent_size = 2048
max_buf_data_size = 8192
hsm_write_prealloc = 0
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