1. Working with a Remote Cluster
7/6/2012
© 2012 MapR Technologies Remote Cluster 1

2. Working with a Remote Cluster
Agenda
• Prerequisites
• Configuring the Clusters
• Managing Multiple Clusters
• Mirroring between Clusters
• Transferring Data with Dump Files
© 2012 MapR Technologies Remote Cluster 2

3. Working with a Remote Cluster
Objectives
At the end of this module you will be able to:
• List the prerequisites for working with multiple clusters
• Understand how to configure each node when working with multiple
clusters
• Describe what is involved in managing multiple clusters
• Explain how mirroring between clusters works
• Understand how to transfer data from a dump file
© 2012 MapR Technologies Remote Cluster 3

4. Prerequisites
© 2012 MapR Technologies Remote Cluster 4

5. Prerequisites
 Clusters must already be established and running
 Clusters must have different names
 Forward and reverse hostname resolution between all nodes
– Yes, even between the clusters
– Either in /etc/hosts or via DNS
© 2012 MapR Technologies Remote Cluster 5

6. Configuring the Clusters
© 2012 MapR Technologies Remote Cluster 6

7. Configuring the Clusters
 Use configure.sh to create new entries in mapr-clusters.conf
– On cluster 1: configure.sh –C <cluster 2> -N <cluster 2>
– On cluster 2, do the reverse (only if you plan to mirror back to cluster 1>
 -N option adds a new line to mapr-clusters.conf
– First line is the local cluster; other lines point to other clusters
– To remove clusters from mapr-clusters.conf you must edit the file
 Restart the warden on all nodes on both clusters
© 2012 MapR Technologies Remote Cluster 7

8. Managing Multiple
Clusters
© 2012 MapR Technologies Remote Cluster 8

9. Managing Multiple Clusters
© 2012 MapR Technologies Remote Cluster 9

10. Mirroring between
Clusters
© 2012 MapR Technologies Remote Cluster 10

11. Mirroring between Clusters
 Set up mirror volume with source on named cluster
– maprcli volume create
-name vol1-mirror
-source vol1@cluster1
-path /vol1-mirror
-mount 1
-type 1
© 2012 MapR Technologies Remote Cluster 11

12. Transferring Data with
Dump Files
© 2012 MapR Technologies Remote Cluster 12

13. Restoration from Dump Files
 Restore dump files to new mirror volumes
 Restore each incremental dump!
 If volumes need to be writable
 Create volumes to receive data
 Copy data from mirror volumes
© 2012 MapR Technologies Remote Cluster 13

14. Questions
© 2012 MapR Technologies Remote Cluster 14