Computer Associates BABWBR1151S40 User Guide - Page 118

Document Level Backup Strategies, Document Level Backup and Restore Performance Tuning

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Backup Recommendations Document Level Backup Strategies There are many factors that contribute to your backup strategy-backup window size, restore window size, server and storage hardware, the amount of available media, media retention time, network bandwidth, server load, and the size of your databases. Although it is important to consider all of these factors, for Document Level backups, the two most important factors are typically tape usage and the amount of time available for your backups. The following recommendations are based on these two factors. If other factors are more important in your environment, adjust your backup strategy accordingly. The first task you must perform when determining a backup strategy is to assess the amount of time your organization has available each week for backing up your Exchange Server. Next, perform a backup of your Exchange Server using Document Level backup to ascertain how long the backup job will take. Finally, use this information to determine the most efficient way of backing up your Exchange Server within the time available to you. If your organization's backup schedule allows you to perform a full backup at least one day a week, perform daily differential backups with one full backup a week. If you want to distribute the full backup throughout the week, perform a full backup of only one storage group per day and rotate which storage group gets the full backup. Back up all other storage groups using differential backups. Document Level Backup and Restore Performance Tuning To maximize performance when using Document Level backup and restore: ■ Increase the value of the Number of Threads configuration setting and decrease the value of the Thread Priority configuration setting. This combination increases performance and minimizes the impact on your server. 118 Agent for Microsoft Exchange Guide

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Backup Recommendations
Document Level Backup Strategies
There are many factors that contribute to your backup strategy—backup
window size, restore window size, server and storage hardware, the amount of
available media, media retention time, network bandwidth, server load, and
the size of your databases. Although it is important to consider all of these
factors, for Document Level backups, the two most important factors are
typically tape usage and the amount of time available for your backups. The
following recommendations are based on these two factors. If other factors are
more important in your environment, adjust your backup strategy accordingly.
The first task you must perform when determining a backup strategy is to
assess the amount of time your organization has available each week for
backing up your Exchange Server. Next, perform a backup of your Exchange
Server using Document Level backup to ascertain how long the backup job will
take. Finally, use this information to determine the most efficient way of
backing up your Exchange Server within the time available to you.
If your organization’s backup schedule allows you to perform a full backup at
least one day a week, perform daily differential backups with one full backup a
week.
If you want to distribute the full backup throughout the week, perform a full
backup of only one storage group per day and rotate which storage group gets
the full backup. Back up all other storage groups using differential backups.
Document Level Backup and Restore Performance Tuning
To maximize performance when using Document Level backup and restore:
■
Increase the value of the Number of Threads configuration setting and
decrease the value of the Thread Priority configuration setting. This
combination increases performance and minimizes the impact on your
server.
118
Agent for Microsoft Exchange Guide