Chapter 19

Data Replication Using SnapMirror

About this chapter

Overview of SnapMirror

The SnapMirror feature replicates data from one volume (the source) to another volume (the mirror) and periodically updates the mirror to reflect incremental changes on the source. The result of this process is an on-line, read-only volume that contains the same data as the source volume at the time of the most recent update. SnapMirror requires a license code.

Chapter contents

This chapter discusses the following SnapMirror topics:

• "Purposes of SnapMirror"
• "How SnapMirror works"
• "Snapshots created during data replication"
• "How SnapMirror works with quotas"
• "How SnapMirror works with the dump command"
• "The /etc/snapmirror.allow file"
• "The /etc/snapmirror.conf file"
• "Replicating a volume"
• "Disabling data replication for the entire filer"
• "Resuming data replication for the entire filer"
• "Disabling data replication for one volume"
• "Checking data replication status"
• "Converting a mirror to a regular volume"
• "Differences between the vol copy command and SnapMirror"

This chapter does not discuss the vol copy command, which copies a volume to another but does not periodically updates the copy. For more information about the vol copy command, refer to Chapter 18, "Volume Copy Using the vol copy Command Set."

Copyright © 1999, Network Appliance, Inc. All rights reserved.

Part No. 210-02334
File: mirror.htm
Last updated: 02/24/99 12:17:14