HP Data Protector Software Cell Manager Planning and Sizing
Table Of Contents
- Executive summary
- Solution description
- Cell Manager software topology
- IDB architecture
- Why should you configure the IDB?
- Regular IDB backups
- IDB notifications
- Limitations
- IDB Growth and Performance
- IDB key growth factors
- IDB key performance factors
- IDB key growth and performance parameters
- Influence of logging level on IDB
- Example: Changing of logging level for filesystem backup
- Influence of catalog protection on IDB
- Example: Changing of catalog protection of a backup
- Recommended usage of logging level and catalog protection
- Use different logging levels in the same cell
- Different logging levels for ObjectCopies
- Specifics for small cells
- Specifics for large cells
- Maintenance of DCBF directories
- Cell Manager hardware aspects to consider
- Cluster support for Data Protector software Cell Manager
- Security
- IDB space consumption example
- Cell Manager requirements
- For more information
3. Balance number
Data Protector will select the DCBF directory that contains (proportionally to size limit) the least
DCBF file number. Minimum for the following value is selected:
(CurrentFiles/MaximumFiles)
Variables influencing DCBF behavior are located in the global options file
DCDirAllocation=0, 1, 2
Default: 0 (1 for Data Protector 6.1)
This global option controls which algorithm will be used to select the directory for the creation of the
new DCBF file.
0: Fill in sequence (default)
1: Balance size (recommended)
2: Balance number
MaxDCDirs=NumberOfDirectories
Default: 10
Minimum: 1
Maximum: 50
This option specifies maximum number of configured DCBF directories.
Note:
The default minimum and maximum size for existing DCBF directories that
were created with a Data Protector version up to the version 6.0 are not
changed automatically to the new supported size with an upgrade to
HP Data Protector 6.1.
But it is possible/recommended to change them manually with the
omnidbutil command:
omnidbutil –modify_dcdir <directory> -maxsize 16384
omnidbutil –modify_dcdir <directory> -spacelow 2048
A manual change of existing dc directories’ size is needed in case drives
with larger capacities are used (for example, LTO-4) and lots of files are
backed up to tape (>10 million)
The spacelow value is enforced by HP Data Protector and is checked
during every backup session. If available space is less than the sum of all
the configured spacelow values, the logging is switched to nolog.
For example: Configured spacelow value = 2048 MB, configured DCBF
directories = 10 Æ required minimum free space = 20 GB
27