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
Number of Backups Scheduled at One Time
The maximum total number of backup sessions running in parallel is 100 on UNIX systems and 60 on
Windows systems. The default value is set to five. This can be increased using the MaxBSessions
global option. When the number of parallel sessions is larger than 50 (recommended maximum) the
probability of hitting one of the system limits on the Cell Manager increases significantly (number of
file descriptors, TCP/IP limitations, memory limitations).
Concurrent Activities
Each backup session can by default use up to 32 devices at the same time. The upper limit for this
parameter is controlled by the MaxMAperSM global option (default = 32).
• By default, up to 32 Disk Agents (depending on the concurrency of a device) can write to the same
device at the same time. This number can be controlled using the MaxDAperMA global option.
• Up to 10 media can be imported in the IDB at the same time.
Note:
It is advisable to not increase the default number of 32 concurrent devices
as high memory utilization on the backup host might occur.
Number of Cells in a MoM (Manager of Manager) Environment
There can be up to 50 cells in a MoM environment.
IDB Growth and Performance
For Internal Database configuration and maintenance, you must understand the key factors and
parameters that influence IDB growth and performance.
The IDB can grow very big and can have a significant impact on backup performance and the Cell
Manager system. The Data Protector administrator has to understand the IDB and decide which
information to keep in the IDB and for how long. It is the administrator’s task to balance restores time
and functionality with the size and growth of the IDB. Data Protector offers two key parameters,
logging level and catalog protection that assist you in balancing your needs.
The data given here is applicable for filesystem backups and illustrates the worst-case scenario
(largest or fastest growing IDB). If you perform disk image, online database, or NDMP backup, a
smaller amount of data is stored in the IDB.
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