Advanced Backup to Disk Performance White Paper

Test Data

In the following proof points, two different file systems were created to cover large file servers and

typical clients, so that the results shown are realistically achievable in similar situations:

1. File server data with millions of small files

2. Typical client data with fewer files and a broad range of size (KB/MB)

HPCreateData

The datasets were developed using the HPCreateData PAT utility, which is downloadable from

http://www.hp.com/support/pat. It generates different file sizes with different data contents (fixed,

random, up to 4:1 compression ratio) and different distribution (file-based, MB-based).

Typical Files

The “typical” file system is created with file sizes between 64 KB and 64 MB and the compressibility

of the data 2:1. The utility creates an equal distribution of files in each directory. Finally, the file

system contains 49.8 GB with 4,389 files in 20 folders.

Figure 5. HPCreateData for Typical Files