Disk Partitioning; Storage System Tuning - Dell PowerConnect W-Airwave Manual

The second partition will required 2 SAS/SCSI drives in a RAID-1 configuration supplied via a hardware
controller. Both drives must have 15K RPM spindle speeds. This partition will contain the operating
system.
Note: Please contact http://support.dell.com when purchasing or configuring any hardware platform servicing more
than 2,500 devices. AWMS servers servicing more than 2,500 devices require 64-bit OS and AWMS 7.1 or higher. Do
not use software raid systems or SATA disk drives.

Disk Partitioning

AWMS automatically partitions the disk subsystem upon installation. You can override these values.
The table below lists the default partitioning and provides guidance for more advanced scenarios.
Default Partitions
boot
swap
/
Default Partitions
boot
swap
/
/alternative
/var/log
/var/lib/pgsql
/var/airwave/rrd
/var/airwave-backup
Note: Please ensure the disk subsystem can sustain these random write rates. Sustained sequential write rates will
not help, because AWMS writes are primarily random.
There could be upgrade or installation issues when manually partitioning your disk subsystem.

Storage System Tuning


Ensure all disks are configured to "One Virtual Disk".

If the RAID controller has battery-backed cache, ensure the Write Policy is configured to "Write-
Back", otherwise ensure it is configured to "Write-Through".
Size
100 MB
Twice size of RAM
Rest of disk space
Purpose
Boot partition
Swap partition
AWMS
Database backup location
All log from all services
PostgreSQL database files
Statistical flat files
Nightly backup location
Recommended Size
100 MB
Twice size of RAM
25% of total disk space
10% of total disk space
5% of total disk space
25% of total disk space
25% of total disk space
10% of total disk space