Configuring a Data Store
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Data store is a device type used for writing the savesets directly on one or several configured storage locations – into the file system. Data store configuration consists of specifying data store capacity and watermarks: HWM and LWM. The default data store type is Path, also available is SEP Si3 deduplication store. As of SEP sesam version 4.4.3, SEP EasyArchive data store and FDS deduplication store are no longer supported. For details on data store concept, see Data store 4.4.
Note that depending on the SEP sesam version, the window might be slightly different, but the configuration remain the same across various SEP sesam versions.
- In the Main selection -> Components, click Data stores to display the data store contents frame.
- From the Data stores menu, select New data store. A New data store dialog appears.
- Under the Data store properties in the Name field, enter a meaningful name for the data store.
- The following data store types are available:
- Path data store
- Si3 Deduplication Store
- NetApp Snap Store (available as of v. ≥ 4.4.3 Grolar)
- Make sure that the option Create drive for data store is checked under the Drive parameter properties. The predefined value for the drive is automatically added to the Drive number field.
- As of SEP sesam 4.4.3 Tigon, the option Create second drive is available.
Segment Data Store
|If you are configuring an Si3 deduplication store, you should be aware of the requirements and recommendations before you select this data store type. For details, see Configuring an Si3 Deduplication Store.|
Segment Drive Parameter
|It is recommended to use the option Create second drive for both available data store types (Path and Si3). Without it, SEP sesam can only allocate a drive either for reading or writing, running one job at a time on the same drive. By using the additional dedicated drive for restore, you are able to run a backup on the first drive and restore your data from the second drive simultaneously. You can also add a third drive for migration.|
- Note that any additional drive dedicated for restore or migration must have the access mode set to read in the Drive properties.
- When using additional drives, all backup jobs must be configured to use the drive dedicated for backup. You specify the drive number for a backup job as described in Creating a Backup Event.
- In case you use the additional drive for migration, you have to specify the dedicated drive as described in Creating a Migration Task.
- You can configure the number of streams per drive. This enables you, for example, to limit the number of parallel backups to 5, but use a higher number of concurrent streams for migration.
When using the Browse button to select the folder, the New data store information window appears with predefined recommended values for your data store size. Click OK to confirm the selected location and the recommended size values. You can modify your data store size later under the Size properties (see step 12). For details on how the size is calculated, see How do I calculate the data store capacity.
Segment Drive Group
- Capacity: The size (in GB) of the partition for backups.
- High watermark: The value (in GB/GiB) for the high watermark (HWM). The HWM defines the upper value for used disk space. When this value is reached, a data store purge process is started for all EOL-free savesets, thus freeing up the capacity of the data store.
- Low watermark: The value (in GB/GiB) for the low watermark (LWM). The LWM defines how much storage space is available for savesets with expired EOL. If LWM is set to 0, the EOL-free savesets are removed from the data store at the next purge. The LWM for the deduplication store is set to 0 by default and cannot be edited.
|In previous versions of SEP sesam (≤ 18.104.22.168 Tigon), if HWM was set and exceeded, backups could no longer be started while running backups were allowed to finish. Purging is done until the low watermark is reached (if set). This behaviour has changed with SEP sesam v. ≥ 22.214.171.124 Tigon V2; if HWM is set, exceeding it will only issue an information message but will no longer prevent backups to be started.|
Segment (read-only) Disk Space Usage
The Disk space usage properties are used by SEP sesam to report the following:
- Used: Total used space (in GB) on the partition.
- Total: Maximum available space (in GB) on the partition as reported by the operating system.
- Free: Available disk space (in GB) for SEP sesam.
- Deduplication rate: If applicable. The deduplication ratio is depicted as ratio:1.
If you answer No, you have to create the media pool later and your configuration is finished. If you answer Yes, a new media pool dialog is displayed.
Creating a media pool
Once you set up your backup strategy, you can back up your data to your new media pool. You can start a configured backup task immediately or schedule it to run after you have created a schedule and linked a backup event to it. For details, see Creating a Schedule and Creating a Backup Event.
If you want to start the backup task immediately, right-click the name of the backup task and click Immediate start. Note that you only need to select the appropriate media pool referring to your data store and click Start.