Requirements for the Standby CommServe Host
The CommServe database is the key component for CommServe functionality, required for all CommCell operations. Therefore, we recommend that you assign a computer as the standby CommServe host, install the CommServe software on the standby host, and stage the CommServe database for easier activation of the CommServe host.
Standby CommServe Host Recommendations
Prior to assigning a standby CommServe host, apply the following best practices:
- To avoid simultaneous failure caused by a site-wide or geographical location disaster, place the standby CommServe host in a separate physical location from the production CommServe host.
- The standby CommServe host must meet system requirements for the CommServe software. We recommend a similar set of hardware, software, and network connectivity for a full scale recovery of CommServe functionality and performance.
- For speedy recovery of CommServe functionality, the service pack or update of the CommServe software on the standby CommServe host must be at the same level as that of the production CommServe host.
- TCP/IP connectivity with the production CommServe host or any of the CommCell component hosts is optional and dependent upon how you plan to stage the CommServe database, activate the CommServe host, and provide CommServe functionality to other CommCell components. You may have a completely separate network with alternate hosts for other CommCell components, or you may expect the standby CommServe to assume the production CommServe functionality using existing CommCell components.
Standby CommServe Host License
A CommCell license is based on the CommServe IP address. You can preconfigure an alternate or standby CommServe host with CommServe software by using the temporary license provided with the software.
If you know the standby CommServe IP address prior to activation, then you can use a Dual CommCell license that contains both the production and standby CommServe host IP addresses. If the standby CommServe IP address is not known prior to activation, then a new or dual license is required. You can obtain the license by e-mail through your software account manager or support. The new Dual CommCell license has the same CommServe ID (CCID) but with the standby CommServe IP address. The license is applied by using the Disaster Recovery tool upon activation of the standby CommServe host.
For more information, see License Administration.
Protected Storage for CommServe Backup and Restore Location
The library that is used for the CommServe Disaster Recovery backups must be accessible by a MediaAgent installed on a computer separate from either the production or standby CommServe host. This way, when the production CommServe host fails, the database can still be recovered to the standby CommServe host.
To facilitate data movement on a WAN between two different sites, we recommend that you configure a two-copy deduplication-enabled storage policy with the DASH copy configured between MediaAgents and disk libraries located at each site. For restoring backups by a local MediaAgent to the standby CommServe host, you can back up the production CommServe databases to the local MediaAgent and backup the data auxiliary copies to the secondary site.
For more information, see Staging Backup Data Using DASH Copy.