3.7.0 HP StorageWorks HP Scalable NAS File Serving Software installation guide HP Scalable NAS for Linux (AG513-96004, October 2009)

I/O scheduler policies
The Linux I/O schedulers (also called elevators) attempt to sort and issue disk I/O
requests according to specific priority policies. Testing has shown that the deadline
policy results in the best performance for the PSFS filesystem.
The deadline policy is the default in the SLES10 kernel. For RHEL5, the default
policy is cfq. In the HP RHEL5 binary kernels and kernel sources provided by HP,
the I/O scheduler policy has been set to deadline.
For best performance, HP recommends that you do not change the deadline policy
for the I/O schedulers.
HP Scalable NAS documentation
Product manuals and articles about using the product are located on the HP PolyServe
Software Manuals web page. Go to the following web page:
http://www.hp.com/go/scalablenas
Select HP PolyServe Software from the Related Products list in the right-hand column.
Then, on the HP PolyServe Software page, select Support for your product from the
Support section in the right-hand column.
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