HP StorageWorks P4000 User Manual
Multi-site ha/dr solution pack
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HP StorageWorks
P4000 Multi-Site HA/DR Solution Pack user
guide
Abstract
This guide contains detailed instructions for designing and implementing the Multi-Site SAN features of the HP
P4000 SAN Solution. The Multi-Site SAN features enable you to synchronously and automatically mirror data
between geographic sites. Topics include designs for network configurations and instructions about implementing
the network designs. The intended audience is system administrators who manage HP P4000 SAN solutions.
For the latest version of this guide, see the HP website http://www.hp.com/support/manuals.
Part Number: AX696-96027
Fourth edition: November 2010
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Table of Contents
Related Manuals for HP StorageWorks P4000
Summary of Contents for HP StorageWorks P4000
- Page 1 This guide contains detailed instructions for designing and implementing the Multi-Site SAN features of the HP P4000 SAN Solution. The Multi-Site SAN features enable you to synchronously and automatically mirror data between geographic sites. Topics include designs for network configurations and instructions about implementing the network designs.
- Page 2 Legal and notice information © Copyright 2009-2010 Hewlett-Packard Development Company, L.P. Confidential computer software. Valid license from HP required for possession, use or copying. Consistent with FAR 12.211 and 12.212, Commercial Computer Software, Computer Software Documentation, and Technical Data for Commercial Items are licensed to the U.S.
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Page 3: Table Of Contents
Installing and configuring a Failover Manager ............... 28 Best practice ......................28 Configuring sites ........................29 Viewing sites in the CMC ....................29 Sites map view ......................30 Designating a primary site ....................31 Adding a site ........................31 P4000 Multi-Site HA/DR Solution Pack user guide... - Page 4 Editing a site ........................31 To edit a site ....................... 32 Deleting a site ........................32 Adding storage systems to a Multi-Site cluster ................32 Adding additional capacity to existing sites ................32 To add capacity ......................33 Removing storage systems from a Multi-Site cluster ................. 33 To remove the storage systems from the site ................
- Page 5 Viewing the Sites Details tab window ................ 26 No sites in a standard cluster ................... 30 Site assignments in a Multi-Site cluster ............... 30 Deleting a site that contains a storage system causes this warning ......... 32 P4000 Multi-Site HA/DR Solution Pack user guide...
- Page 6 Tables Data protection levels and the supported number of sites ..........8 Common configurations of Multi-Site SANs and mangers ..........10 Alternative Multi-Site SAN configurations ..............13 Common Multi-Site network configurations and failure protection of each ....... 14 Failure conditions and resolutions ................19 Common Multi-Site SAN configurations with recommended managers ......
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Page 7: Designing A Multi-Site San
A Multi-Site SAN requires a feature key for each storage system in the management group that is also participating in a Multi-Site cluster. All sites must have the same number of storage systems. Storage systems must be added to or re- moved from Multi-Site clusters equally. P4000 Multi-Site HA/DR Solution Pack user guide... -
Page 8: Designing A Multi-Site San
Designing a Multi-Site SAN The Multi-Site SAN software offers multiple features and the design flexibility to protect against certain types of failures in the environment. Data replication, site design, and quorum managers combine to protect against certain types of failures in the environment. Some of the common types of failures a Multi-Site SAN protects against include data center failures and storage system failures: Data center failures Site power outage... -
Page 9: When To Use Network Raid-10+2
Several recommended site configurations can be used with the Multi-Site SAN software. These configurations provide varying levels of availability and redundancy. Table 2 on page 10 shows the recommended configurations. Select the one that best matches your environment. P4000 Multi-Site HA/DR Solution Pack user guide... -
Page 10: Best Practice
In addition to setting up the Multi-Site clusters for data replication, it is important to set up the SAN managers for quorum correctly to ensure that in the event of a failure the system can be properly recovered. Maintaining quorum can be either an automated process or manually recovered by an Administrator. -
Page 11: Three Physical Sites: Cluster Spans Two Sites, Failover Manager In Third Site
Figure 2 Three physical sites: cluster spans two sites, Failover Manager in third site 1. Volumes are configured with Network RAID-10 Figure 3 Two physical sites, logical third site: cluster spans two sites, Failover Manager in logical third site P4000 Multi-Site HA/DR Solution Pack user guide... -
Page 12: Three Physical Sites: Cluster Spans Three Sites
1. Volumes are configured with Network RAID-10+1 Figure 4 Three physical sites: cluster spans three sites 1. Volumes are configured with Network RAID-10 Figure 5 Two physical sites: cluster spans two sites, one site is the primary site Designing a Multi-Site SAN... -
Page 13: Alternative Setups
Good network design is a critical part of setting up a Multi-Site SAN that meets your needs. A good Multi-Site SAN network encompasses the following attributes: Reliability High availability High performance This section contains information about the minimum recommended network design considerations when planning a network to support a Multi-Site SAN. P4000 Multi-Site HA/DR Solution Pack user guide... -
Page 14: Best Practices For Implementing The Multi-Site San Network
Best practices for implementing the Multi-Site SAN network Adequate bandwidth—Plan for 50 MB/sec of bandwidth for each storage system in each site. For instance, if each site contains five storage systems, then you need 250 MB/sec throughput. In this case, that translates into two Gigabit Ethernet links, or more. Low round-trip latency—In order to not impact disk I/O to the application server, the round-trip latency between the sites must be no more than 2 ms. -
Page 15: Sample Recommended Network Configurations For Multi-Site Sans
The clusters and sites can have many more storage systems than are depicted here. However, the pictures are more focused on the network design. 1. Dual redundant GigE links Figure 6 Dual redundant links between two sites P4000 Multi-Site HA/DR Solution Pack user guide... -
Page 16: Dual Redundant Links Between Two Sites With Failover Manager In Logical Third Site
1. Dual redundant GigE links 2. Optional redundant path Figure 7 Dual redundant links between two sites with Failover Manager in logical third site 1. Dual redundant GigE links Figure 8 Triangular network with Failover Manager Designing a Multi-Site SAN... -
Page 17: Hub And Spoke Network Core With Redundant Links Out To Each Site
1. Core network hub and spoke Figure 9 Hub and spoke network core with redundant links out to each site 1. Full mesh core network Figure 10 Combination full-mesh core with triangular links to all sites P4000 Multi-Site HA/DR Solution Pack user guide... -
Page 18: Using Multiple Subnets
Using MPIO with multiple subnets When you are using multiple subnets in a Multi-Site SAN, the HP StorageWorks P4000 DSM or Microsoft DSM will only build I/O paths to the storage systems that are in the same subnet as the application server. -
Page 19: Setting Up Application Clusters In A Multi-Site San Environment
If using multiple subnets in the storage cluster, log on to both VIPs in the cluster. If you are using the HP P4000 DSM for MPIO, see “Using the HP P4000 DSM for MPIO,” in the HP StorageWorks P4000 Windows Solution Pack User Manual. -
Page 20: Recover Quorum Operation
Failure condition Resolution steps Primary site offline If any of the storage systems running managers in the primary site can be brought back online, you should do this first. If all storage systems in the primary site are lost forever, you can use the Recover Quorum command-line function to recover quorum in the secondary site manually. - Page 21 Manager count = three one manager in each site Number for quorum = two For six or more storage systems, Manager count = six run: Number for quorum = four two managers in each site P4000 Multi-Site HA/DR Solution Pack user guide...
- Page 22 Designing a Multi-Site SAN...
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Page 23: Implementing A Multi-Site San
Install Multi-Site SAN feature keys on the storage systems you are going to use. Register your storage systems. For more information, see “Registering Advanced Features” in the HP StorageWorks P4000 SAN Solution User Manual for information about registering your storage systems. -
Page 24: Creating The Management Group
Figure 12 Using the management group wizard to create a Multi-Site SAN NOTE: You must have at least one storage system for each site in the Available Systems pool before starting. Creating the management group The first part of the wizard creates the management group, which includes configuring the optimal number of managers for the initial setup. -
Page 25: Viewing The Multi-Site Cluster Information
The Cluster tab view (Figure 13) which shows the sites. The Sites view (Figure 14) which shows detailed information about the storage systems in the cluster. P4000 Multi-Site HA/DR Solution Pack user guide... -
Page 26: Converting An Existing San To A Multi-Site San
Figure 13 Viewing the sites in the cluster Details tab Figure 14 Viewing the Sites Details tab window Converting an existing SAN to a Multi-Site SAN Plan the conversion according to the criteria described in “Preparing to convert an existing SAN to a Multi-Site SAN”... -
Page 27: Using The Multi-Site Cluster Wizard
Failover Manager on a separate server on the network and then add it to the management group as required by the design of your Multi-Site SAN. We recommend using the Failover Manager instead of the Virtual Manager because of its automated failover/failback capabilities. P4000 Multi-Site HA/DR Solution Pack user guide... -
Page 28: Configuring Regular Managers
Be sure to change the manager configuration to best reflect the new configuration of the management group. See the HP StorageWorks P4000 SAN Solution User Manual, Chapter 9, “Working with Management Groups,” the section “Optimum Number of Managers.”... -
Page 29: Configuring Sites
To view sites in the CMC, select the Sites node in the navigation window. The Sites node is displayed in every management group. Typically, however, the Sites Details tab shows the storage systems as unassigned. The site designation has no effect outside of the Multi-Site SAN configuration. P4000 Multi-Site HA/DR Solution Pack user guide... -
Page 30: Sites Map View
Figure 15 No sites in a standard cluster When there is a Multi-Site cluster in the management group, the Sites Details tab shows the site assignments of the storage systems and servers. Figure 16 Site assignments in a Multi-Site cluster A management group can contain multiple clusters, some of which are Multi-Site and some of which are not. -
Page 31: Designating A Primary Site
Only one site can be primary. Adding or removing systems. IMPORTANT: All sites must have the same number of storage systems, except for the Failover Manager, which can reside in a site by itself. Adding or removing servers. P4000 Multi-Site HA/DR Solution Pack user guide... -
Page 32: To Edit A Site
To edit a site Right-click the Sites node in the navigation window and then select Edit Sites. Select the site you want to edit and then click Continue. Make the desired changes. Click OK when you are finished. Deleting a site You would delete a site from a Multi-Site cluster when you are either reconfiguring your SAN or recovering from a disaster or other failure. -
Page 33: To Add Capacity
To add capacity Add the license keys to the new storage systems. See “Registering Advanced Features” in the HP StorageWorks P4000 SAN Solution User Manual for more information about license keys. Add the new storage systems to the management group. -
Page 34: Removing Servers From A Site
Be sure to change the manager configuration to best reflect the new configuration of the management group. See the section Optimum Number of Managers” in the chapter, Working with Management Groups” in the HP StorageWorks P4000 SAN Solution User Manual . Removing servers from a site You can remove servers from a site as server use and needs change. -
Page 35: Support And Other Resources
HP. It is integrated with HP Systems Insight Manager. A dedicated server is recommended to host both HP Systems Insight Manager and HP Insight Remote Support Advanced. Details for both versions are available at: http://h18004.www1.hp.com/products/servers/ management/insight-remote-support/overview.html P4000 Multi-Site HA/DR Solution Pack user guide... -
Page 36: New And Changed Information In This Edition
You can find these documents from the Manuals page of the HP Business Support Center website: http://www.hp.com/support/manuals In the Storage section, click Disk Storage Systems and then select P4000 SAN Solutions. HP websites For additional information, see the following HP websites: http://www.hp.com... -
Page 37: Hp Product Documentation Survey
Please take 10 minutes to visit the following web site and complete our online survey. This will provide us with valuable information that we will use to improve your experience in the future. http://www.hp.com/support/storagedocsurvey Thank you for your time and your investment in HP storage products. P4000 Multi-Site HA/DR Solution Pack user guide... - Page 38 Support and other resources...
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Page 39: Glossary
Command-line interface for the SAN/iQ software. cluster A cluster is a grouping of storage systems that create the storage pool from which you create volumes. Centralized Management Console. See HP StorageWorks P4000 Centralized Management Console. P4000 Multi-Site HA/DR Solution Pack user guide... - Page 40 SNMP data. Configuration The Configuration Summary displays an overview of the volumes, snapshots, Summary storage systems, and iSCSI sessions in the HP StorageWorks P4000 SAN Solution. It provides an overview of the storage network broken out by management groups. data center Also known as a “Site.”...
- Page 41 Contain storage systems that reside in two or more sites Contain storage systems that span subnets Contain multiple VIPs. The cluster can have a single site, and the multiple VIPs make it a multi-site cluster. P4000 Multi-Site HA/DR Solution Pack user guide...
- Page 42 Synchronous replication, mirroring or parity protection on a volume-by-volume basis. Protecting data for a volume across all storage systems in the cluster. Network RAID-10, 10+1 or 10+2 is required to protect data in an HP P4000 SAN solution. network window Graphically depicts the status of each storage system.
- Page 43 The system can keep track of several configuration changes at once. This means you can change configurations, even while a volume is in the midst of a different reconfiguration. P4000 Multi-Site HA/DR Solution Pack user guide...
- Page 44 Use traps to have an SNMP tool send alerts when a monitoring threshold is reached. solution pack HP StorageWorks P4000 Windows Solution Pack split mirror A split mirror is a remote snapshot whose relationship to the primary volume has been severed. Split mirrors are usually created for one-time use and then discarded.
- Page 45 Not used in release 8.0 and later. volume size The size of the virtual device communicated to the operating system and the applications. Volume Shadow Copy Service P4000 Multi-Site HA/DR Solution Pack user guide...
- Page 46 VSS Provider HP StorageWorks P4000 VSS Provider is the hardware provider that supports the Volume Shadow Copy Service on the HP P4000 SAN Solution. writable space temporary space Glossary...
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Page 47: Index
Multi-Site, CMC, viewing sites in, common Multi-Site SAN network designs, configuration diagram dual redundant links between 2 sites and Failover Manager in 3rd site, triangular network with Failover Manager, configurations, alternative Multi-Site SAN, P4000 Multi-Site HA/DR Solution Pack user guide... - Page 48 3rd site, creating, removing storage systems from, wizard, Multi-Site SAN glossary alternative configurations, for SAN/iQ software and HP StorageWorks common configurations with recommended P4000 SAN, Failover Manager, common network designs, converting from an existing SAN, designing, help implementing, obtaining, installing,...
- Page 49 Multi-Site SAN, environment, volumes MPIO with multiple subnets, creating with Multi-Site SAN wizard, multiple subnets for a Multi-Site SAN, websites HP Subscriber's Choice for Business, product manuals, wizard, Multi-Site clusters, P4000 Multi-Site HA/DR Solution Pack user guide...