HP Data Protector Software Performance White Paper

Network restore of typical files

The typical files were restored via the network (Gigabit Ethernet) from the remote backup server

and its SCSI-attached Ultrium 960 tape drive.

Table 7 shows that the tape device of test 1 and the disk device of test 3 were faster than with

Data Protector in test 4. In this scenario, both operating systems showed the same performance

for the tests via the network, which was the bottleneck. The Gigabit Ethernet itself has a 1,000

Mb/s or 120 MB/s limitation which is very close to the results of test 4 (Windows with 104.96

MB/s and HP-UX with 104.22 MB/s).

Table 7. Network restore of typical files – bottleneck determination

Test Performance (MB/s) Bottleneck?

1. Windows L&TT Tape Read

156.00 No

2. Windows HPCreateData Single

133.98 No

3. Windows HPCreateData Parallel

164.67 No

4. Windows DP Ultrium 960 Parallel 104.96

Yes (Network)

1. HP-UX L&TT Tape Read

160.71 No

2. HP-UX HPCreateData Single

130.58 No

3. HP-UX HPCreateData Parallel

265.75 No

4. HP-UX DP Ultrium 960 Parallel 104.22

Yes (Network)

Tested in the section Evaluating tape and disk drive performance on page 32