|
|
|
Upgrades are a good time to review if appropriate data backup systems are in place. If current performance, load, or billing data is potentially significant, having a backup copy of the data can be a worthwhile “insurance” step.
When upgrading to a new version of CNA, data file formats are automatically converted to be compatible with the newer version. CNA cannot convert all previous versions to the current version; incremental upgrade/conversion steps are necessary to retain data. Details of this process are described below. Note also that CNA data cannot be downgraded to a previous major revision and retain data; data files cannot be converted to an older format. If it is necessary to downgrade CNA to a previous major release, deleting all data will be necessary. If there is a backup of data in the appropriate format, it can then be restored to the downgraded system.
Performance and load optimization data can be copied to an appropriately configured rsync server.
For background on configuring an rsync host, see Chapter 2: Configuration Fundamentals in the CNA Fundamentals Guide.
The amount of disk space required to make a complete backup can be estimated with the show trending command:
Avaya_ANS# show trending performance | inc Disk Disk Usage for Link RRDs : 56M Disk Usage for Customer-Link Link Info RRDs : 4.0K Disk Usage for Customer-Link Link Distribution RRDs : 4.0K Disk Usage for Router RRDs : 2.8M Disk Usage for Summary-Live RRDs : 92M Disk Usage for Summary-Snapshot RRDs : 900K Disk Usage for Group RRDs : 129M Disk Usage for Group-Link RRDs : 211M Disk Usage for Prefix RRDs : 1.2G Avaya_ANS# Avaya_ANS# show trending link | inc Disk Disk Usage for Bandwidth and Billing RRDs : 68M Avaya_ANS#
The sum of the all item lines above provides a rough estimate of the amount of disk space required to make a complete system backup. In the example above, this total is (56 MB+ 4KB + 4KB _ 2.8 MB + 92MB + 900KB + 129MB +211MB + 1.2GB + 68MB) = at least 1.7 GB.
Once an rsync host has been enabled, the rsync commands can be used to make a complete copy of the data.
For full details on configuring rsync, see the CNA Command Reference Guide.
Note that on a production system, completing this process may take some time.
|
|
|