Acronis Recovery for Microsoft Exchange - User Guide User Manual download pdf (Page 31)

database from a full database backup to a chosen location. Enough of the transaction

log is included in the backup to let you recover the database to the time when the

backup finished. When the database is recovered, uncommitted transactions are rolled

back. The restored database matches the state of the original database when the

backup finished, minus any uncommitted transactions.

For a small database that can be backed up quickly, it is convenient to use only full

database backups. However, as the database becomes larger, full backups take more

time to finish and require more storage space. Therefore, for a large database, you

might want to supplement full database backups with incremental backups.

A full backup can form a base for further incremental backups or can be used as a

standalone archive.

The incremental backup records all transactions and database modifications made by

each transaction since the last full or incremental backup were created. The

transaction log is a crucial component of the database and, if there is a system failure,

applying the transaction log might be required to bring your database back to a

consistent state. The transaction log file has a fixed size and an automatically

generated filename. After creating the incremental backup, transaction logs will be

truncated.

To choose the appropriate backup type (or types), you have to determine how you

need to make the data available for recovery. Your overall backup strategy defines the

type and frequency of backups as well as the type and capacity of the hardware

required for the archive location. See the next section 5.1.3 “Which Backup Strategy to

Choose?” for our recommendations.

5.1.3 Which Backup Strategy to Choose?

Follow the recommendations below to define the best backup strategy for your

organization:

• Database activity is low to medium:

- Full backup once a week

- Incremental backup every 12 hours

• Database size is small to medium, but activity is high:

- Full backup every two days

- Incremental backup every ten minutes

• Database size is large and activity is high:

- Full backup once a week

- Incremental backup every ten minutes

For advice on creating the best strategy you can also rely upon Acronis Recovery for

MS Exchange Assistant while working with the Create Backup wizard. See 5.2.6 for

detailed information.

We recommend that you do not use several third-party backup tools

simultaneously since backup operations may conflict. Instead, combine

different backup types to protect your data with Acronis Recovery for MS

Exchange.

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Acronis Recovery for Microsoft Exchange - User Guide User Manual Page 31