Sun ZFS Storage 7420
 
Oracle ZFS Storage ZS3-2
 
Sun Storage 7110 Unified Storage System
 
Sun Storage 7210 Unified Storage System
 
Oracle ZFS Storage ZS4-4
 
Sun Storage 7410 Unified Storage System
 
Sun ZFS Storage 7120
 
Oracle ZFS Storage ZS3-4
 
Sun Storage 7310 Unified Storage System
 
Sun ZFS Storage 7320
 
Oracle ZFS Storage Appliance Racked System ZS4-4
 
Oracle ZFS Storage ZS3-BA
 

PLA-Support>Sun Systems>DISK>ZFS Storage>SN-DK: 7xxx NAS
 

In this Document

Purpose

Scope

Details

Overview

Installation

Installation Steps

Uninstallation Steps

Applies to:

Purpose

This document provides general information, installation guide and remediation information for Time Since Last Sync (Replication) metric extension for the Oracle EM Plug-in for Oracle ZFS Storage Appliance.

Scope

This is document is intended for administrators and Oracle support engineers that monitor Oracle ZFS Storage Appliance with Oracle Enterprise Manager

Details

Overview

The Oracle Enterprise Manager Metric Extension for Replication’s Minutes from Last Sync (hereafter known as “The Metric Extension”) will be released to address the critical customer need for determining if a Quality of Service metric is being met for a replication site being in sync within a certain number of minutes.

It is important to distinguish between a Replication Lag and the metric provided here, Minutes from Last Sync. A Replication Lag is

• The difference between the current time and the time the snapshots were taken for the current (or last) replication
• If there was no data transferring (or to be transferred) since the last replication time, the value is 0

This value is critical for continuous replication where the target is supposed to be “close” to up to date at all times. A Disaster Recovery (DR) site being out of date by 15 minutes or more could violate a site’s QoS.

Calculating Replication Lag without support from the AK is difficult, the snapshot for the projects must be located and a time-offset calculated. At any time, the replication could be updated, invalidating the current calculation in progress.

At this time determining when the snapshots were taken that are the basis for a replication is not supported.

As a substitute, we will provide the “Minutes from Last Sync” value to the customer as a Metric Extension. Some additional values must be supplied for context within the extension node. The “Minutes from Last Sync” will be available within the Replication Action information for ZFSSA Plug-in 2.2.

Minutes from Last Sync is a simple calculation:

• The difference between the current time (adjusted for the agent offset from the target appliance) and the time of last completed synchronization.
• In the case of a “continuous” replication with no data syncing, the result will be “0” minutes. In the case of a large set of data or a deactivated metric, the result will be the last successful synchronization.
• In the case of a replication with no successful synchronizations, a 0 will be returned. Scheduled replications (or manual) can also make use of the metric to determine when the previous replication finished so a target could be kept within a certain number of minutes of a source.

Installation

Deliverable package will include:

• common-java.jar
• ME$ReplicationMinSinceLastSyncNonWindows.zip
• ME$ReplicationMinSinceLastSyncWindows.zip

Installation Steps

1. Replace the existing common-java.jar with the new one
   
   - Log into the EM Agent
   - cd $Agent_HOME/plugins/oracle.sun.oss7.agent.plugin_12.1.0.6.0/scripts/lib
   - Replace the common-java.jar with the new one in the deliverable package.
   
   
2. Import the Metric Extension zip file on EM BUI.
   - Log into EM.
   - Select from top level menu: "Enterprise" - "Monitoring" - "Metric Extension".
   - Click the "Actions" - "Import...", select "Browse" and select the two zip files, ME$ReplicationMinSinceLastSyncNonWindows.zip and ME$ReplicationMinSinceLastSyncWindows.zip
   - Choose the newly added metric extension and click "Actions" - "Save As Deployable Draft"
   - Choose the newly added metric extension and click "Actions" - "Publish Metric Extension"
   
   
3. To deploy to a targets.
   - If the target is monitored by a non-windows agent, use the ReplicationMinSinceLastSyncNonWindows metric extension
   - If the target is monitored by a windows agent, use the ReplicationMinSinceLastSyncWindows metric extension
   - Choose the extension row and click "Action" - "Deploy To Targets", click "+Add" and select targets.

Uninstallation Steps 

1. Undeploy from all targets:
   - Go to "Enterprise" - "Monitoring" - "Metric Extensions"
   - Select theReplicationMinSinceLastSync metric extension, choose "Actions" - "Manage Target Deployments"
   - Select all deployed targets and click "Undeploy"
2.  Delete the Metric Extension:
   - Go to "Enterprise" - "Monitoring" - "Metric Extensions"
   - Select theReplicationMinSinceLastSync metric extension, choose "Actions" - "Delete"
3. (Optional) Replace back the common-java.jar back with the original jar file. This is not required since the new jar file is backward compatible.

This solution has no attachment