Qlogic Online Data Migration Using the iSR6200 in Cluster Configurations (ISR651405-00 A, December 2011)

ManualsBrandsHP ManualsStorageHP MPX200 10-1GbE Base Multifunction Router

ISR651405-00 A 1

Online Data Migration Using the iSR6200

in Cluster Configurations

Introduction

This applications note explains how to insert the iSR6200 Series Intelligent Storage Router when a

cluster configuration is required for online data migration. It contains the following information:

 “Online Data Migration Methods” on page 2:

 “Method 1—Generic Method (Cluster Downtime During Insertion)” on page 3

 “Method 2—Online Migration with Zero Downtime” on page 3

 “Method 3—Online Migration with Minimal Downtime” on page 3

 “Method 4—Online Migration with Cluster Failover” on page 4

 “Inserting the Router into an MSCS Data Path” on page 5

 “Inserting the Router into an HP-UX Serviceguard Solutions Metrocluster” on page 6:

 “HP-UX 11.23 (PVLinks)” on page 6

 “HP-UX 11.31” on page 7

 “Inserting the Router into a VMware Cluster” on page 7

 “Inserting the Router into a Solaris Cluster” on page 8

For online migration of cluster configurations, the iSR6200 can be in a data path performing data

migration while allowing read/write access to the source array for the cluster nodes. All of the normal

cluster functionality is executed as if the cluster nodes are directly accessing the source array. For details

on how to present LUNs to cluster nodes, refer to the Data Migration Service for iSR6200 User’s Guide.

Online migration is supported in almost all cluster configurations, including Microsoft Cluster Service

(MSCS) on Windows

Server 2003 and 2008, Solaris

, and VMWare

In online insertion, the iSR6200 inserts itself into the active I/O path while the cluster is online, without

causing functional or performance issues. Online insertion is supported only in specific cluster

configurations, such as Windows 2008 clusters using native Microsoft Multipath I/O (MPIO) and VMware

clusters.

Products Affected

QLogic Storage Router Part Number

iSR6240 6240-C12-X

iSR6250 6250-C12-X

iSR6260 6260-C12-X

Summary of content (10 pages)

PAGE 1
Online Data Migration Using the iSR6200 in Cluster Configurations Products Affected QLogic Storage Router Part Number iSR6240 6240-C12-X iSR6250 6250-C12-X iSR6260 6260-C12-X 1 Introduction This applications note explains how to insert the iSR6200 Series Intelligent Storage Router when a cluster configuration is required for online data migration.
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– Online Data Migration Methods NOTE: For details about configuration and zoning changes that must be completed to introduce the router in the data path, refer to the Data Migration Service for iSR6200 User’s Guide. Figure 1-1 illustrates a dual-blade setup for online data migration using the iSR6200. Figure 1-1.
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2 – Online Data Migration Methods 2.1 Method 1—Generic Method (Cluster Downtime During Insertion) Use this method to insert the iSR6200 in the data path of the cluster node in offline mode. You must bring down cluster nodes during the insertion process. You must also present the source LUNs from the iSR6200—instead of directly zoning source array ports—and then bring back online the cluster nodes.
PAGE 4
2 – Online Data Migration Methods 2.4 Method 4—Online Migration with Cluster Failover Specific MSCS configurations that use quorum disks require a cluster failover to insert the router in the data path of the cluster nodes. For these configurations, QLogic recommends that you insert the router as follows: 1. Replace the direct path with the router path, and then reboot the secondary node with router paths alone, as shown in the following steps: a. Shut down the secondary node. b.
PAGE 5
3 – Inserting the Router into an MSCS Data Path 3 Inserting the Router into an MSCS Data Path MSCS cluster behavior differs depending on the OS, the multipathing software, and the storage array. Table 3-1 lists the supported clusters for MSCS on Windows Server 2003 and Table 3-2 lists the clusters for Windows Server 2008. Table 3-1.
PAGE 6
4 – Inserting the Router into an HP-UX Serviceguard Solutions Metrocluster Table 3-2. MSCS Clusters on Windows Server 2008 (Continued) Cluster Type Quorum Disk (Node and Disk Majority) Array Model EMC CX3-40 Host Platform Setting on Array MPIO Supported Router Insertion Method a No special setting required (use the default setting for Windows hosts) Windows Native Method 2 PowerPath 5.
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5 – Inserting the Router into a VMware Cluster 4. Extend the VG with the router paths, so that the VG has all direct paths and router paths. 5. Issue the vgdisplay -v command, and then verify that the alternate links for router paths have been successfully created. 6. Issue the vgreduce command to remove, one at a time, the PVs from the VGs in the direct paths, so that only the router paths are available in the VG.
PAGE 8
6 – Inserting the Router into a Solaris Cluster If you are inserting the router for an ESX node in a VMware cluster, follow these steps instead of the procedure in the user’s guide: 1. In the original configuration, ensure that the VM was created on a common datastore, and that the VM is currently running on the ESX-Host 1. 2. While I/O is running, check the path status and ensure that both paths are active. 3. In the vSphere™ Client, click the Configuration tab. 4.
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6 – Inserting the Router into a Solaris Cluster 8. After the paths are removed on the host, add a router-presented target path. 9. Check the path status on the cluster nodes to ensure that the nodes show router-presented paths. 10.Repeat Step 8 and Step 9 until all direct paths are removed and replaced with router-presented paths. 11. Verify that the newly added paths are seen on Solaris cluster nodes. 12.
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Document Revision History Revision A, July 13, 2011 Changes Initial release of new document. Corporate Headquarters QLogic Corporation 26650 Aliso Viejo Parkway Aliso Viejo, CA 92656 949.389.6000 www.qlogic.com International Offices UK | Ireland | Germany | France | India | Japan | China | Hong Kong | Singapore | Taiwan © 2011 QLogic Corporation. Specifications are subject to change without notice. All rights reserved worldwide.