HP Data Protector Software Performance White Paper

Backup of typical and small files

This section covers the local and network backup of typical and small files. For Windows NTFS

file systems with millions of small files, the first tree walk was disabled as described in the

section File System Tree Walk on page 38

. For UNIX file systems, the first tree walk was always

enabled (default) because it is less critical.

Figure 32 illustrates the effect of the first file system tree walk during the HP-UX network backup

of small files. At the beginning, the Windows server loaded the tape and waited for data from the

remote HP-UX server, which was busy with the execution of the HP-UX file system tree walk.

Figure 32. CPU Load of the Windows backup server during the HP-UX network backup of millions of small files