How to achieve over 2 TB/hr network backup with Integrity entry-class servers running HP-UX 11i v3

The server with the most memory — the rx3600 client system with 8 GB of memory — has the highest

data restore throughput performance.

Figure 9: Client restore statistics using Data Protector

While tuning of client systems for backup and restore was not included in this backup server

characterization effort, application performance and backup/restore performance on the client system

might be optimized further by using the HP-UX vxtunefs command.

Best practices

This section describes the most notable best practices derived from the backup server

characterization, including:

o HP-UX 11i v3 features and capabilities that helped greatly with metrics gathering and storage

I/O management

o Considerations and techniques for private backup network configuration, tape library

configuration, and other backup utility capabilities

Taking advantage of HP-UX 11i v3 features

HP-UX 11i v3 delivers a number of features that benefited this backup/restore performance

characterization effort, including the ability to:

• Display I/O throughput for tape devices (sar -t)

• Display I/O throughput for I/O ports (sar -H) to view I/O spread across all HBA ports

• Display all paths to a specific device (ioscan -m lun)

• Set a specific I/O path for tape devices (scsimgr set_attr -a lpt_to_lockdown)

• Use single, persistent DSFs per device (SAN agility of Device Special Files, using binding of

LUN WWIDs)

100

rx2600/2/2GB rx2600/2/4GB rx3600/4/8GB rx6600/2/4GB

CPU %

Memory %

Restore MB/s