HP P4000 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide
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- HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 1
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 - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 2
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 - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 3
Failover Manager overview ...7 Requirements ...7 Designing a Multi-Site SAN ...8 Configuring data replication for optimal availability and redundancy 8 When to use Network RAID-10+2 9 Configuring sites and quorum managers to achieve optimal high availability and redundancy ....... 9 Best practice - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 4
a site ...34 3 Support and other resources 35 Contacting HP ...35 Subscription service ...35 HP Insight Remote Support Software 35 New and changed information in this edition 36 Related information ...36 HP websites ...36 Typographic conventions ...36 HP product documentation survey 37 Glossary - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 5
Figures 1 Sample configuration for two-site, data protection level Network RAID-10+2 9 2 Three physical sites: cluster spans two sites, Failover Manager in third site 11 3 Two physical sites, logical third site: cluster spans two sites, Failover Manager in logical third site ...11 4 Three physical - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 6
of Multi-Site SANs and mangers 10 3 Alternative Multi-Site SAN configurations 13 4 Common Multi-Site network configurations and failure protection of each 14 5 Failure conditions and resolutions 19 6 Common Multi-Site SAN configurations with recommended managers 20 7 Document conventions 36 6 - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 7
Manager for quorum management if the network connection between the two sites becomes unavailable. • Recover quorum via CLI when a site failure also results in losing quorum in the management group. Failover Manager overview The Failover Manager is a specialized version of the SAN/iQ software - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 8
-Site SAN and associated supported configurations. Table 1 Data protection levels and the supported number of sites Data protection level Network RAID-10 Network RAID-10+1 Number of sites supported 2 3 NOTE: 2 sites are supported, but not considered a best practice configuration Network RAID-10 - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 9
of data protection that enables the Multi-Site SAN to sustain a complete failure at one site and still maintain replicated data at the other site. For instance, with Network RAID-10+2 there are four copies of data for the volume on the SAN. In a two-site configuration, the Multi-Site SAN software - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 10
. All sites are peer. All sites are peer. One site is designated primary. Best practice In a cluster that spans multiple sites, run the same number of managers in each site. In a cluster that spans two sites, run a Failover Manager in a third site (physical or logical) that is not included in the - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 11
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 11 - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 12
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 . 12 Designing a Multi-Site SAN - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 13
the Failover Manager. For more information about the Virtual Manager, see the chapter "Special Managers" in the HP StorageWorks SAN Solutions Storage System User Guide. Using Remote Copy with Multi-Site SAN The cluster contains Remote Copy, which like all other SAN/iQ features, is compatible with - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 14
physical sites, use a Failover Manager. Put the Failover Manager in the third site (physical or logical) located on a network that is isolated from the other sites and has a different power connection. Common Multi-Site SAN network designs Based on the Multi-Site SAN configuration, there are many - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 15
tion tection failure protection Hub & spoke central core Yes Yes, so long as the core does not fail Yes Combo full-mesh core with triangular links between sites Yes Yes Yes Sample recommended network configurations for Multi-Site SANs Samples of common network configurations for the - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 16
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 . 16 Designing a Multi-Site SAN - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 17
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 17 - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 18
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. See the HP StorageWorks P4000 Windows Solution Pack User Manual for more information about MPIO. 18 Designing a Multi - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 19
HP P4000 DSM for MPIO, see "Using the HP P4000 DSM for MPIO," in the HP StorageWorks P4000 Windows Solution Pack User Manual. Using the Primary Site designation in two-site configurations The Multi-Site SAN software supports designating a particular site as Primary so that it does not go offline - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 20
1. Removes all offline managers from the management group. 2. Ejects all offline storage systems from the management group. 3. The SAN/iQ software is modified to prevent any data integrity issues in the event any of the offline storage systems are brought back online. Best practices for configuring - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 21
-Site SAN configuration Manager configuration Number of managers and number Needed to maintain quorum Two physical sites, logical third site For two storage systems, run: • one manager in each site • one failover manager in the logical third site • two managers in each site, one failover manager - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 22
22 Designing a Multi-Site SAN - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 23
? See "Designing the network for the Multi-Site SAN" on page 13 for detailed information about setting up your network appropriately. Installing the Multi-Site SAN To install a Multi-Site SAN, use the Management Groups, Clusters, and Volumes Wizard. P4000 Multi-Site HA/DR Solution Pack user guide 23 - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 24
the number of subnets you have configured. 5. Create volumes using the data protection levels dictated by your Multi-Site cluster design. Using the Multi-Site cluster wizard After creating the management group, the Create a Cluster window of the wizard is displayed. 24 Implementing a Multi-Site SAN - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 25
layout. NOTE: You can have one VIP per subnet. 9. Click Next to continue. 10. Click Finish when you have finished defining the volume. The management group, sites, Multi-Site cluster, and the volume about the storage systems in the cluster. P4000 Multi-Site HA/DR Solution Pack user guide 25 - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 26
Plan the conversion according to the criteria described in "Preparing to convert an existing SAN to a Multi-Site SAN" on page 23. Prerequisites • Upgrade all storage systems to SAN/iQ software version 7.0 or later. • Obtain the feature keys for storage systems to be used in the Multi-Site cluster - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 27
plan to use a Failover Manager instead, you must manually install the 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 - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 28
Server, VMware Server, or VMware Player. For detailed instructions for installing and configuring the Failover Manager see "Using Specialized Managers" in the HP StorageWorks P4000 SAN Solution User Manual. Best practice Install the Failover Manager on a server in a separate physical location from - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 29
subnet or power grid • May be marked as primary • Have a planned number of managers • Have a planned data protection level • Can have application servers assigned to them Viewing sites in the CMC To view sites in the CMC, select the Sites node in the navigation window. The Sites node is displayed in - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 30
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 tools, see the HP StorageWorks SAN Solutions Storage System User Guide. Sites map views include the following: 30 Implementing a - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 31
in the CMC if you want to add a site to an existing cluster. You must have equal numbers of storage systems in each site. The Failover Manager can occupy the Failover Manager, which can reside in a site by itself. • Adding or removing servers. P4000 Multi-Site HA/DR Solution Pack user guide 31 - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 32
standard cluster. If you then remove the storage system(s) assigned to that site, data that resides on the cluster will restripe. 1. Select the Sites node in the add them in a way that does not violate the requirements of the Multi-Site SAN. See "Adding a site" on page 31 if you plan to add the - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 33
HP StorageWorks P4000 SAN Solution User Manual for more information about license keys. 2. Add the new storage systems to the management group. 3. Select the management systems you are adding. 10. Add the storage systems for the data on the volumes. • P4000 Multi-Site HA/DR Solution Pack user guide 33 - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 34
optimal. 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 - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 35
with a management platform. • HP Insight Remote Support Advanced: This software provides comprehensive remote monitoring and proactive service support for nearly all HP servers, storage, network, and SAN environments, plus selected non-HP servers that have a support obligation with HP. It is - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 36
information: • HP StorageWorks P4000 SAN Solution User Manual 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 - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 37
that makes our storage hardware and software products easy to install, operate, and maintain. Your feedback is invaluable in letting us know how we can improve your experience with HP documentation. Please take 10 minutes to visit the following web site and complete our online survey. This - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 38
38 Support and other resources - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 39
from snapshot temporary space. CLI 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. CMC Centralized Management Console. See HP StorageWorks P4000 Centralized Management Console. P4000 - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 40
and application servers. The community string acts as an authentication password. It identifies hosts that are allowed read-only access to the SNMP data. The Configuration Summary displays an overview of the volumes, snapshots, storage systems, and iSCSI sessions in the HP StorageWorks P4000 SAN - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 41
user-definable name that displays below the storage system icon in the network window. It is also visible when the users browse the network. HP StorageWorks P4000 Centralized Management Console Management interface for the SAN/iQ software. ID LED LED lights on the physical storage system so that - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 42
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. Storage systems on the network are either available or part of a management - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 43
disk has been inserted in a drive. • Off - Data cannot be stored on the storage system. The storage system is offline and flashes red in the network window. register remote copy pair remote snapshot remote volume Register individual storage systems to use add-on applications. Registration - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 44
this snapshot data on the SAN. snapshot A fixed version of a volume for use with backup and other applications. snapshot set Application-managed snapshots created for a volume set. SNMP traps Use traps to have an SNMP tool send alerts when a monitoring threshold is reached. solution pack HP - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 45
storage server Storage server software maintains the customer's data. It reads to and writes from disks in response to customer reads and writes of SANiQ volumes. stripe Striped data is stored across all disks in the array, which increases performance but does not provide fault tolerance. - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 46
VSS Provider writable space HP StorageWorks P4000 VSS Provider is the hardware provider that supports the Volume Shadow Copy Service on the HP P4000 SAN Solution. See temporary space 46 Glossary - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 47
site, 15 triangular network with Failover Manager, 15 configurations, alternative Multi-Site SAN, 13 configuring data protection level, 8 Failover Manager, 28 managers for Multi-Site SAN, 27 regular managers, 28 sites and quorum managers, 9 contacting HP, 35 conventions document, 36 converting an - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 48
network with Failover Manager, 15 configuring, 28 installing, 28 overview, 7 typical configuration with 3rd site, 10 G glossary for SAN/iQ software and HP StorageWorks P4000 SAN, 39 H help obtaining, 35 high availability data protection level, 8 site and manager configuration, 9 HP technical support - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 49
Q quorum configuration best practices, 20 operation to recover, 20 sites and quorum managers, 10 R recommended network configurations for Multi-Site SANs, 15 recover quorum operation, 20 redundancy site and manager configuration for, 9 related documentation, 36 remote support software, 35 removing - HP P4000 | 9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide - Page 50
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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
h
t
tp://w
w
w
.hp
.co
m/su
ppo
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t/man
uals
.
Part Number: AX696-96027
Fourth edition: November 2010