Advanced Backup to Disk Performance White Paper

File System Tree Walk

During runtime, Data Protector creates backup statistics by a first tree walk, which briefly scans the

files selected for the backup and calculates its size, so that the progress (percentage done) can be

calculated. In a second tree walk, the data is written to the backup device.

Note: If millions of small files are backed up, the first tree walk could take considerable time and

increase the overall runtime. The tree walk can be disabled by setting “NoTreeWalk=1” in the

configuration file “<Data_Protector_home>\omnirc”.

HP StorageWorks SDLT 320 Tape Drive

The SLDT 320 tape drives are configured with default values.

Figure 12. HP StorageWorks SDLT 320 Tape Drive – Test Environment

March 2005 Data Protector 5.5 - Advanced Backup to Disk Test Plan 4

Advanced Backup to Disk

SDLT320 Tape Drives

HP OpenView Storage

Data Protector 5.5

2 Gigabit Fibre Channel

HP ProLiant DL380G4

3.2 GHz, 4GB RAM, 2 CPUs

HP StorageWorks SDLT320

Tape Drives

Ultra2 SCSI

Primary Disk Array MSA1000 with 14 x 146GB/10K disks

configured as RAID1+0, 8 x 100GB LUNs configured

Secondary SATA-based Disk Array MSA1500 with 12 x 250GB/7.2K disks

Backup to Secondary

Array

Backup to Tape

from Secondary Array