Calculate Linux Server disk IOPS for moving to EMC SAN.

[Gulam Mohiuddin]

We have six Linux Servers having 8 x 75GB local disk attached to each server. All the Servers have at least couple of Oracle databases instances.

We are in the process of attaching those servers to EMC SAN therefore our SAN administrator has asked us to provide him total disk IOPS requirements for these six Linux servers so that he can allocate appropriate spindle in SAN storage to sustain the required load.

Thanks,

Gulam.

[Srikanth Arunachalam]

Hi Gulam,

For each server, find out the actual capacity requirement based on the applications running on it. If I were you, I will request for following LUNs to be created on the EMC for each LINUX server.

(1) Root disk/boot disk of size 30GB
(2) Space for application software including
Oracle software (approx size for
Oracle database software is 10-15GB for
Oracle 10g).
(3) Space for Oracle tablespace/datafiles for instance 1 (you need to workout the space required depending on instance space).
(4) Space for Oracle tablespace/datafiles for instance 2.
(5) Space required for database backup and storing archive redo logs for instance1.

mirrored disk LUNS for above 5 LUNS

The distinction of each LUNs should follow for other other 5 equivalent LINUX boxes as well.

Space required for database backup and storing archive redo logs for the database instances.

Mirrored disk for storing database backup and storing archive redo logs for the database instance.

Thanks,
Srikanth

[Gulam Mohiuddin]

Thanks for your response.

But I am looking for total disk I/O requirements per server and not the size.

Thanks,

Gulam.

[Ivan Ferreira]

Use iostat or sar -d to identify your current disk operations per second. Collect information about all your servers and provide the sum of the highest rate you find to your SAN administrator.