This document discusses working with remote MapR clusters, including prerequisites for connecting clusters, configuring each cluster using configure.sh, managing multiple clusters, mirroring data between clusters using source and mirror volumes, and transferring data between clusters using dump files. The objectives are to understand how to set up and manage connections between separate MapR clusters.

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