topic Re: Kernal Parameters for a c8000 as a SAN in Operating System - HP-UX

Kernal Parameters for a c8000 as a SAN

LV2DIVE — Mon, 19 Mar 2007 08:19:57 GMT

Anyone have any suggestions for the Kernal parameters on a C8000 HP-UX 11.11 box. It has a Compellent Drive attached via gigabit ethernet.

Re: Kernal Parameters for a c8000 as a SAN

Steven E. Protter — Mon, 19 Mar 2007 08:24:17 GMT

Shalom,

No change in kernel parameters is required to connect to a SAN. The driver for the HBA card will add a module to the kernel and force a system reboot.

Kernel configuration changes will depend on how the data is deployed on the SAN and what kind of data it is. For example, kernel parameter changes are normally required to run oracle.

SEP

Re: Kernal Parameters for a c8000 as a SAN

LV2DIVE — Mon, 19 Mar 2007 08:31:50 GMT

OK.

No performance gains by changing any of these parameters?

maxdsize
maxfiles
maxswapchunks
maxtsiz

Re: Kernal Parameters for a c8000 as a SAN

Steven E. Protter — Mon, 19 Mar 2007 08:34:40 GMT

Shalom again.

This does not depend on the SAN. It depends on how you use the server. There are perfomanmce gains to be had, depending on what applications you are running.

To actually answer the question:
1) What applications do you run.
2) What is the buffer cache? dbc_max_pct, dbc_min_pct

Adjusting the buffer cache and improve performance for certain applications.

SEP

Re: Kernal Parameters for a c8000 as a SAN

LV2DIVE — Tue, 20 Mar 2007 08:30:27 GMT

Here are the answers to your questions.

<1) What applications do you run.
On the clents from this NFS server we run:
CATIA V4 & V5
PDGS
UG
IDEAS
HyperMesh
LUM
FlexLM
The actual server is only NIS Slave and SAN

<2) What is the buffer cache?