HP StoreOnce 4430 HP StoreOnce Backup System Concepts and Configuration Guidel - Page 68

Summary of VTL best practices, The HP StoreOnce B6200 Backup system supports only FC VTLs.

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Figure 39 Cartridges with appended backups (not recommended) Our recommendations are: • Target full backup jobs to specific cartridges, sized appropriately • Reduce the number of appends by specifying separate cartridges for each incremental backup Taking the above factors into consideration, an example of a good rotation scheme where the customer requires weekly full backups sent offsite and a recovery point objective of every day in the last week, every week in the last month, every month in the last year and every year in the last 5 years might be as follows: • 4 daily backup cartridges, Monday to Thursday, incremental backup, overwritten every week. • 4 weekly backup cartridges, Fridays, full backup, overwritten every fifth week • 12 monthly backup cartridges, last Friday of month, overwritten every 13th month. • 5 yearly backup cartridges, last day of year, overwritten every 5 years. This means that in the steady state, daily backups will be small, and whilst they will always overwrite the last week, the amount of data overwritten will be small. Weekly full backups will always overwrite, but housekeeping has plenty of time to run over the following day or weekend or whenever scheduled to run, the same is true for monthly and yearly backups. Total virtual tapes required in above rotation = 25 Each backup job effectively has its own virtual tape. Summary of VTL best practices NOTE: The HP StoreOnce B6200 Backup system supports only FC VTLs. • Make use of multiple network or Fibre Channel ports throughout your storage network to eliminate bottlenecks. • For FC configurations, split virtual tape libraries and drives across multiple FC ports ( FC VTL is available on StoreOnce B6200, 4210 FC/ 4220/4420/4430 models). • Configure multiple VTLs and separate data types across them; for example SQL to VTL1, Filesystem to VTL2, and so on. • Configure larger "block sizes" within the backup application to improve performance. • Disable any multiplexing configuration within the backup application. • Disable any compression or encryption of data before it is sent to the StoreOnce appliance. • Best throughput is achieved with multiple streams, the actual number per device/appliance varies by model. • Schedule physical tape offload/copy operations outside of other backup, replication or housekeeping activities. 68 Virtual Tape Devices

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Figure 39 Cartridges with appended backups (not recommended)
Our recommendations are:
•
Target full backup jobs to specific cartridges, sized appropriately
•
Reduce the number of appends by specifying separate cartridges for each incremental backup
Taking the above factors into consideration, an example of a good rotation scheme where the
customer requires weekly full backups sent offsite and a recovery point objective of every day in
the last week, every week in the last month, every month in the last year and every year in the last
5 years might be as follows:
•
4 daily backup cartridges, Monday to Thursday, incremental backup, overwritten every week.
•
4 weekly backup cartridges, Fridays, full backup, overwritten every fifth week
•
12 monthly backup cartridges, last Friday of month, overwritten every 13th month.
•
5 yearly backup cartridges, last day of year, overwritten every 5 years.
This means that in the steady state, daily backups will be small, and whilst they will always overwrite
the last week, the amount of data overwritten will be small. Weekly full backups will always
overwrite, but housekeeping has plenty of time to run over the following day or weekend or
whenever scheduled to run, the same is true for monthly and yearly backups.
Total virtual tapes required in above rotation = 25
Each backup job effectively has its own virtual tape.
Summary of VTL best practices
NOTE:
The HP StoreOnce B6200 Backup system supports only FC VTLs.
•
Make use of multiple network or Fibre Channel ports throughout your storage network to
eliminate bottlenecks.
•
For FC configurations, split virtual tape libraries and drives across multiple FC ports ( FC VTL
is available on StoreOnce B6200, 4210 FC/ 4220/4420/4430 models).
•
Configure multiple VTLs and separate data types across them; for example SQL to VTL1,
Filesystem to VTL2, and so on.
•
Configure larger “block sizes” within the backup application to improve performance.
•
Disable any multiplexing configuration within the backup application.
•
Disable any compression or encryption of data before it is sent to the StoreOnce appliance.
•
Best throughput is achieved with multiple streams, the actual number per device/appliance
varies by model.
•
Schedule physical tape offload/copy operations outside of other backup, replication or
housekeeping activities.
68
Virtual Tape Devices