Exchange Server 2007 supports a broad range of data protection options. In this blog post, we will cover Incremental data backup peculiarities and find out when it suits best. We will also show how to configure this backup type using CloudBerry Backup for MS Exchange.
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Exchange 2007 Incremental Backup
Exchange Incremental backups contain only the log files created since the last Full or Incremental backup run. This backup size is much lower if compared to Full - that is why it is suitable for daily data protection.
Each log file contains a user's activity transactions (sent email, created calendar entry, etc) that may not be committed to the DB yet. This write-ahead approach improves Exchange performance, but you should always remember that accidentally losing even a few log files may corrupt your database or backup chain.
Since incremental data copy uses a transactional logs mechanism, we should cover a few precautions about Exchange logs:
- You can not use an incremental or differential backup when Exchange Circular Logging is enabled - it keeps the few last log files and overwrites them sequentially. There is simply no consistent data to copy.
- You need to restore the latest full backup and all subsequent incremental before restoring the desired incremental data copy.
- After a successful incremental backup restoration, you need to wait while Exchange Server applies each restored log file to the database.
- If some backups in the full-incremental chain become corrupted, you will lose the rest of the backups created next to the corrupted one.
Note: detailed backup scenario planning is not the topic of this article, but you should remember about LCR, CCR, and SCR database copies that are aimed to support fast database recovery in case of disaster. DB replication can also lower server load during a back-up since you can create data copies using secondary database copy. Read more in the “High Availability Strategies” article.
Windows allows you to cover most Exchange backup scenarios using the built-in tool Windows Server Backup. But if you want to store backups in a cloud and need better configuration flexibility - try third-party backup tools created especially for Exchange. Let’s figure out how to create incremental backups using CloudBerry Backup for MS Exchange (CBB).
Exchange Incremental Backup to Amazon S3
The guide below covers Exchange data backup in the Amazon S3 cloud. But the procedure is similar to other cloud storage systems supported by CloudBerry.
Note: we use Windows Server 2008R2 SP1 with installed Exchange Server 2007 SP3.
- Run CloudBerry Backup for MS Exchange and click the MS Exchange button in the top-left corner:
- You can create a Local or Cloud backup or use the Hybrid Backup option, allowing you to have a few copies locally in a separate data copy in the cloud. We will use Local or Cloud in this guide.
- Choose the Amazon S3 storage account on the Select Backup Storage step. If you run the Backup Wizard for the first time and have not added a Storage account yet - watch this video before proceeding.
- Change the backup plan name if you wish, and leave other checkboxes on their defaults. Note the AWS Snowball Import checkbox - it allows you to speed up initial data seeding or retrieving. You can read more in the “Working with AWS Snowball” article.
- Select the desired database to backup. If you get WinRM-related errors, you first need to troubleshoot Windows Remote Management service or just add a database manually by specifying its path.
- Proceed to the Schedule step leaving the misceleration settings on their defaults. CBB can perform an Exchange backup only once or by using a specific schedule - let’s check advanced planning by clicking the Recurring (Edit Schedule) option:
Daily, weekly and monthly selection templates are available, but you can schedule backups as often as once per ten minutes using the Occurs every section. Click OK.
There is also the “Stop the plan if it runs for” option, allowing you to cancel a backup if it lasts longer than the backup window available, thus avoiding performance degrading during business hours:
- You should also schedule a Full backup creation on the next step, since it is the base of any Exchange backup chain:
We suggest creating a Full backup once a week for better RTO in case of disaster, since the fewer incremental copies you have - the faster restoration you get.
Configure pre- and post- backup actions if needed, set up notifications on the backup plan state, and apply the changes. The backup plan is now created.
Note: Exchange Incremental Backup in CloudBerry Backup does not backup t-logs. Instead, we include logs into each subsequent incremental backup
Exchange Server allows you to create backups as often as your business demands, but keep in mind that the most reliable and error-prone way to protect the Exchange data is creating Full data copies whenever you can. It simplifies the restoration steps and contains all necessary data.
But if you need to create backups as often as once a day (or even hour), or your DB is huge - incremental backups are your best friend. Except for database replication tools, of course.
If you do not have a proven backup tool yet, try our CloudBerry Backup for MS Exchange for free and check whether it meets your business needs.