HP Data Protector A.06.11, Руководство по интеграции

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Backup types
The Microsoft Exchange Server Writer supports the following Microsoft Exchange
backup types:
• Full - backs up databases, transaction logs, and checkpoint files. The transaction
logs are truncated.
• Incremental - backs up the transaction logs to record changes since the last full
or incremental backup. The transaction logs are truncated.
• Differential - similar as incremental backup, but the transaction logs are not
truncated.
• Copy - a Full backup, but the logs are not truncated. This type of backup is not
intended for use in recovering failed systems.
Limitations
• A combination of VSS snapshot backups and non-VSS backups (for example,
incremental stream backups) is not supported.
• You can back up only the whole server or full storage groups. Single stores cannot
be backed up.
• Circular logging must be disabled.
• With Exchange Server 2003, only one VSS backup session can be running on
the same application system at once. With Exchange Server 2007, only one VSS
backup session backing up a specific storage group can be running on the same
application system at once. Consequently, if you start such a backup session
while another one is in progress, the latter waits until the first one finishes.
Recommendations
• With the HP StorageWorks EVA provider, an Exchange storage group should
not reside on more than four source volumes. However, the recommended
configuration is that transaction logs reside on one source volume and the stores
on another source volume. This configuration enables you to perform a rollforward
recovery if only the stores are lost.
Create one backup specification for each storage group and schedule them in a
row.
Rollforward recovery
Rollforward of a storage group can be performed with incremental or differential
ZDB to tape of the same objects as were backed up in instant recovery enabled
sessions (ZDB to disk or ZDB to disk + tape). If the logs are still available on disk,
Zero downtime backup integration guide 371