HP Data Protector Software Performance White Paper

Figure 36 shows that enabling software compression increased the CPU load from 13% to 99%.

The CPU load was very high because Data Protector compressed five file systems in parallel.

Figure 36. CPU load of HP-UX local backup to Ultrium 960 with software compression OFF/ON

Note: As a rule of thumb, each software compression process takes all the available resources

of a single CPU. For instance, one Disk Agent would use only one out of four CPUs, which

would result in an overall 25% CPU load.

Software Compression OFF/ON

CPU Load of HP-UX Local Backup to Ultrium 960

99%

13%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

OFF ON

Software Compression

CPU Load