HP Data Protector A.06.11 Integration Manual page 191

When set to 1, the NDMP Media Agent uses system physical memory only.
When set to 0, the NDMP Media Agent stores part of the catalog in file history
swap files. Set the variable to 0 whenever the number of files in the backup
specification exceeds 5 millions. Consequently, the NDMP Media Agent can
handle backups of up to 20 million files (in one backup specification), provided
the system has enough resources.
For example, to back up 20 million files, where 10% of the total number of backed
up files are directories, with the average directory name consisting of 25
characters, and average filename consisting of 10 characters, you need
approximately 1.9 GB of system memory and 2.8 GB of disk space.
For optimal performance, select 10 million files and directories for backup.
For more information on file history swap files, see the OB2NDMPFHFILEOPT
variable description.
• OB2NDMPCATQUESIZE
Default value: 5
This variable sets the number of internal buffers that hold catalog information
before storing it to file history swap files. By fine tuning the value, you can
increase, to a certain extent, NDMP backup performance.
When set to 5, the NDMP Media Agent can process up to 20 million files (in one
backup specification), provided that enough system resources are available
(approximately 1.9 GB of system memory and 2.8 GB of disk space).
Set the variable to higher values if the number of files in the backup specification
is less than 20 millions and enough system memory is available.
To calculate memory allocation overhead in kilobytes, multiply the variable value
by 512.
• OB2NDMPFHFILEOPT
Default values:
Windows: Data_Protector_home\tmp, 32, 1024
UNIX: /var/opt/omni/tmp, 32, 1024
This variable fine tunes file history swap files usage. It has three parameters that
define the following:
1. Pathname of the directory where the file history swap files are stored.
2. Maximum number of file history swap files, created by Data Protector on the
NDMP client's disk.
3. Maximum size of a file history swap file (in MB).
The parameters are separated by commas. You can specify several sets of
parameters. Use a semicolon to separate them.
Integration guide for VMware Virtual Infrastructure, Sybase, Network Node Manager,
and Network Data Management Protocol Server 191