HP ProLiant DL380G5-WSS 3.7.0 HP StorageWorks HP Scalable NAS File Serving Sof - Page 249
Con and manage replication, Overview
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14 Configure and manage replication Overview HP Scalable NAS provides tools and processes to enable automatic replication of the data in your PSFS filesystems. During replication, data in specific filesystems or directories on the source cluster is transferred to another cluster called the destination cluster. Before using replication, you will need to create an administrative filesystem and install a matching ssh key pair on both the source and destination clusters. You will also need to create a configuration file that specifies information such as the filesystems and directories to be replicated and the time between replications (the replication interval). When replication has been configured, the replication program is started automatically when HP Scalable NAS is started. When a replication interval begins, a replication program verifies that the filesystems to be replicated are mounted. IMPORTANT: All replication set source directories must be mounted on every node that is running replication. The replication program also monitors the filesystems and directories for any changes and creates log files specifying files that have been added, modified, or deleted during the replication interval. At the end of the interval, the new and changed files are transferred to the destination cluster via rsync. (If a file already exists on the destination cluster, only the changes in the file will be transferred.) Files that were deleted from the source cluster are also deleted from the destination cluster. rsync is configured to use compression (this setting cannot be changed.) Replication stores its state information in the mxds datastore on the membership partitions. The replication configuration is also kept in the mxds datastore. HP Scalable NAS File Serving Software administration guide 249
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