HP StoreOnce 4420 HP StoreOnce Backup System Concepts and Configuration Guidel
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- HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 1
housekeeping operations competing for resources. The information in this guide is valid for both single-node and multi-node G3 StoreOnce Backup systems, running software version 3.6.0 and later. IMPORTANT: Always check http://www.hp.com/support/manuals for the most up-to-date documentation for your - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 2
contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 3
SAN only with Gateway 35 5 Network configuration in multi-node StoreOnce Backup systems 36 What is currently supported...36 What is not currently supported 36 Supported network configurations (templates 36 Gateway considerations...37 Template 1, uses 10 GbE and 1 GbE sub-nets 37 Template - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 4
retention policy 67 Retention policy...67 Rotation scheme...67 Summary of VTL best practices 68 10 NAS shares 70 Operating system support...70 Backup application support...70 Shares and deduplication stores 70 Maximum concurrently open files 71 Maximum number of NAS shares 71 Maximum number of - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 5
Maximum number of hosts per NFS share 72 CIFS share authentication...72 Backup application configuration 72 Backup file size...73 Disk space pre-allocation...74 Block/transfer size...74 Concurrent operations...74 Buffering...74 Overwrite versus append...74 Compression and encryption 75 Verify... - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 6
115 StoreOnce 2700, 4500 and 4700 Backup 116 StoreOnce 2610/2620, 4210/4220 and 4420/4430 Backup 117 About this guide 120 Intended audience...120 Related documentation...120 Document conventions and symbols 120 HP technical support...121 HP websites...121 Documentation feedback...121 6 Contents - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 7
bandwidth. HP StoreOnce Backup system models The information in this guide relates to all G3 HP StoreOnce Backup system models. (G3 node) Table 2 StoreOnce 2700/ 4500, 4700 Product model Description Interfaces supported HP StoreOnce 2700 A single server with iSCSI only 8TB Backup , BB877A - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 8
enclosure with 11+4 spare pre-configured storage, BB904A Storage expansion Not supported One 12-disk expansion shelf One 12-disk expansion shelf One 12 HP StoreOnce products, running StoreOnce software 2.x.x and 1.x.x. This guide should not be used with those products. StoreOnce Catalyst targets for - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 9
NAS target devices may be created as backup targets for both Windows and UNIX/Linux hosts, and may be used with most backup applications that support backup to disk. NAS targets on an HP StoreOnce Backup System provide network file share access that is optimized for backup to disk. They should - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 10
and viewed by the operating system: CIFS shares for Windows, NFS shares for Unix Specific environments that This is a NAS target for do not support tape backup - not recommended emulation backup or prefer for random NAS file type to backup directly to disk. In access. nl some cases the - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 11
at Rest Encryption and Secure Erase) require a security license. NOTE: Licenses can only be applied from the StoreOnce CLI. See the HP StoreOnce CLI User Guide for more information. Licensing 11 - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 12
stores or libraries! See the HP StoreOnce Backup system CLI Reference Guide for more information about the StoreOnce CLI commands for backing up need to restore your keystore. Installing the additional couplet is an HP Support task, but you are responsible for ensuring that a Security license has - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 13
guide, but it also contains a worked examples for sizing a VTL, NAS and StoreOnce Catalyst solution and implementing StoreOnce Catalyst with supported backup applications. You can find these documents from the Manuals page of the HP Business Support Center website: http://www.hp.com/support/manuals - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 14
2 HP StoreOnce technology A basic understanding of the way that HP StoreOnce Technology works is necessary in order to understand factors that may impact performance of the overall system and to ensure optimal performance of your backup solution. Data deduplication HP StoreOnce Technology is an " - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 15
the WAN • Apply replication bandwidth limits or apply replication blackout windows to prevent bandwidth hogging. The maximum number of concurrent replication jobs supported by source and target StoreOnce appliances can be varied in the StoreOnce Management GUI to also manage throughput and bandwidth - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 16
reclamation). The process of removing chunks of data is not an inline operation because this would significantly impact performance. This process, termed "housekeeping", runs on the appliance as a background operation. Housekeeping is triggered in different ways depending on device type and backup - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 17
The figure below shows a single backup job from multiple hosts, where the backup data is radically different from one backup job to the next. There is also only a single stream to the device on the StoreOnce Backup system. This configuration produces slow performance and poor deduplication ratios. - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 18
Figure 2 Recommended configuration using multiple streams Effect of multiple streams on StoreOnce Performance The following graph, illustrates the relationship between the number of active data streams and performance; the appliance is assumed to be one of the larger models where more than 24 - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 19
the stream, RAID type and others. Note 2: With 5 streams at 100MB/Sec we do not reach the maximum throughput of the node (server), which can support 600MB/sec in this example. This is the maximum possible ingest rate of the device for a specific model based on 5 streams. This ingest rate is - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 20
ingest of the StoreOnce appliance is 600MB/sec but we can only achieve 500 MB/sec because that is as fast we we can supply the data (because of stream limitations). If we could re-configure the backups to provide more streams, we could get higher throughput. In example 4 (brown circle) we show a - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 21
we could configure 6 devices with say 17 streams to each or 20 devices with 5 streams to each. 6 devices is preferable because: • Less devices are easier to manage but we can still group similar data types into the same device • They provide best possible throughput when we have the higher stream - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 22
is described in more detail in the relevant chapters of this guide. This chapter describes basic concepts only. The HP StoreOnce B6200 of up to 28 TB/hour. The architecture uses high levels of redundancy supported by 2-node couplets that allow autonomic failover to the other node in a couplet - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 23
, 8-node configuration is the largest permitted configuration. • Failover: This occurs within a couplet. Service sets for VTL/NAS/Replication will run on the remaining node in the couplet. • Failback: This is a manual process to restart a node after recovery/repair. • VIF: This is a Virtual network - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 24
between two nodes in a couplet. Depending on customer requirements and single node best practices, it is possible to have, for example, a service set on node 1 that consumes 100 TB and a service set on node 2 that consumes 28 TB of the available 128 TB. (However, this is not best practice and not - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 25
Figure 8 Showing Node 2, Service Set 2 failed over to Node 1 Deployment choices The very a Fibre Channel switch; direct FC Connect is not supported. The switch MUST support NPIV for the FC failover process to work. See Configuring FC to support failover with the HP StoreOnce B6200 Backup system (page - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 26
Figure 9 HP B6200 Backup system, customer connections 26 Concepts specific to StoreOnce B6200 Backup system - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 27
data transfer and management access to the StoreOnce Web and CLI Management Interfaces. NOTE: The HP StoreOnce B6200 Backup system does not support iSCSI VTL devices. Configured backup devices and the management interfaces are all available on all network IP addresses configured for the appliance - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 28
Most also have two additional 10GbE ports. Network bonding is supported on pairs of 1GbE and 10GbE ports, as described in network configuration files that is not included in this guide. This section explains network configurations for the following service specialists. 28 Networking considerations - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 29
. For detailed information about configuring network bonding modes, please refer to the HP StoreOnce 2620, 4210/4220 and 4420/4430 Backup system Installation and Configuration guide. Network configuration in single-node StoreOnce Backup systems 29 - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 30
Single port configurations The example shows the simplest configuration of a single subnet containing just one 1GbE network port, generally this configuration is likely to be used: • Only if the network interface is required only for management of the appliance or • Only if low performance and - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 31
Dual port configurations This example describes configuring multiple subnets in separate IP address ranges for each pair of network ports. A maximum of 4 separate subnets can be configured on a StoreOnce 4420 or 4430 appliance (2 x 1GbE and 2 x 10GbE). Use this mode: • If servers to be backed up are - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 32
Bonded port configurations (recommended) If two network ports are configured within the same subnet they will be presented on a single IP address and will be bonded using one of the bonding modes as described in Network bonding modes. This configuration is generally recommended for backup data - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 33
10GbE Ethernet ports on StoreOnce Backup systems 10GbE Ethernet is provided as a viable alternative to the Fibre Channel interface for providing maximum iSCSI VTL performance and also comparable NAS performance. 10GbE ports also provide good performance when using StoreOnce Catalyst low and high - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 34
Option 1: HP StoreOnce Backup system on Corporate SAN and Network SAN In this option, the StoreOnce device has a port in the Corporate SAN which has access to the Active Directory Domain Controller. This link is then used to authenticate CIFS share access. The port(s) on the Network SAN are used to - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 35
Option 2: HP StoreOnce Backup system on Network SAN only with Gateway In this option the StoreOnce appliance has connections only to the Network SAN, but there is a network router or Gateway server providing access to the Active Directory domain controller on the Corporate LAN. In order to ensure - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 36
support for autonomic failover. Installation and configuration of these systems is normally carried out by HP service specialists installation preparation and planning guide. What is currently supported • IPv4 is supported. • DNS is supported. • A maximum of two sub-nets is supported, which can be - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 37
IP address for a default gateway, which will be used to route management and data traffic to and from an external network. Two of the templates support customer sites with two sub-nets and allow you to route data traffic on one network and management on the second. For software revision 3.3.0 and - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 38
to customer's management sub-net internal cabling, should not be removed internal cabling, should not be removed Template 2, uses 1GbE network only Template 2 supports users who have a 1GbE network only. The same network is used for data and management. The default bonding mode for this template is - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 39
2 blue cables bonded 10 GbE ports to customer's data and management network internal cabling, should not be removed Template 4, uses two 1GbE networks Template 4 supports users who have two 1GbE networks. One 1 GbE network is used for data; the other is used for management. The gateway must be in - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 40
Template 5, uses 1GbE network only For software revision 3.3.0 and greater: Template 5 supports users who want to have only two 1GbE network connections from each node in a couplet to their Ethernet switches. The same network is used for - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 41
the multi-node StoreOnce B6200 Backup system has specific FC considerations to ensure support for autonomic failover. This chapter contains generic information about FC support. See also Configuring FC to support failover with the HP StoreOnce B6200 Backup system (page 47). • Virtual library devices - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 42
requirements apply with the HP StoreOnce B6200 Backup system to support autonomic failover. For examples that illustrate multi node products (HP StoreOnce B6200) see Configuring FC to support failover with the HP StoreOnce B6200 Backup system. Switched fabric A - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 43
The illustration above shows the flexibility of the configuration • VTL1 is connected to FC Port 1 exclusively • VTL3 is connected to FC Port 2 exclusively • VTL2 is spread across FC Port 1 and FC Port 2. The medium changer is connected to both ports whereas the drives by default are connected 50% - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 44
topology. The FC port configuration of the StoreOnce appliance should be changed from the default N_Port topology setting to Loop. This topology only supports a single host connected to each private loop configured FC port. In Private loop mode the medium changer cannot be shared across FC Port - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 45
on the SAN or including other servers, and it simplifies the device discovery process. • Disk and tape on the same pair of HBAs is supported along with the coexistence of array multipath software (no multipath to tape or library devices on the HP StoreOnce Backup system, but coexistence of the - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 46
Use the StoreOnce Management GUI to find out the WWPN for use in zoning. The WW port names are on the VTL-Libraries-Interface Information tab. Diagnostic Fibre Channel devices For each StoreOnce FC port there is a Diagnostic Fibre Channel Device presented to the Fabric. There will be one per - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 47
without manual intervention. • NAS target failover is via the Virtual IP system used in the HP B6200 Backup System - the service set simply presents the failed node Virtual IP address on the remaining node. • FC (VTL device) failover relies on the customer's fabric switches supporting - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 48
a backup device goes offline it must be brought back online again manually within the backup application before it can be used to retry the , the HP B6200 Backup System failover works seamlessly. Download from B6200 support documentation. NetBackup can go back to the last checkpoint and carry on - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 49
practices apply when designing for autonomic failover support: • The customer must choose whether also considered as a virtual device within a service set and replication fails over as well as backup • Failback (via CLI or GUI) is a manual process and should be scheduled to occur during a period - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 50
, should Port 1 fail in any of the selected configurations, the WWNs associated with its service set will not exceed 120 and can be failed over safely to Port 2. To summarize: in the next version of this guide. 50 Configuring FC to support failover in a StoreOnce B6200 Backup system environment - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 51
Figure 25 VTL FC example port configurations Fibre channel port presentations 51 - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 52
is transparent to the hosts. Figure 26 VTLs presented to two ports and into dual switches in a single Fabric, recommended configuration 52 Configuring FC to support failover in a StoreOnce B6200 Backup system environment - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 53
If FC switch1 fails, Host A and Host B lose access to their backup devices. Hosts C and D still have access to the media changers and to 50% of the drives on VTL2 and 50% of the drives on VTL1 B6200 failover between nodes is enabled. Scenario 2, single fabric with dual switches, not advised The FC - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 54
is transparent to the hosts. Figure 28 Complex configuration with ports of different VTLs being presented to different fabrics, recommended configuration 54 Configuring FC to support failover in a StoreOnce B6200 Backup system environment - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 55
What happens if a fabric fails? If Fabric 1 fails in the previous configuration, all VTL libraries and nodes on the HP B6200 Backup System still have access to Fabric 2. As long as Hosts A, B and C also have access to Fabric 2, then all backup devices are still available to Hosts A, B and C. The - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 56
, switch or fabric means that all access is lost to the VTLs that are dedicated to that port, switch or fabric 56 Configuring FC to support failover in a StoreOnce B6200 Backup system environment - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 57
Figure 31 Complex configuration with ports of different VTLs being presented to different fabrics, not advised Scenario 4, dual fabric with dual switches, not advised 57 - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 58
, number of data streams, number of devices and number of concurrent tasks, such as housekeeping or replication. All HP StoreOnce Backup systems can support Catalyst stores, Virtual Tape libraries and NAS (CIFS/NFS) shares on the same system, which makes them ideal for customers who have legacy - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 59
both on the StoreOnce appliance and within the backup software because of the advanced functionality it delivers. • HP StoreOnce is only supported on HP Data Protector 7.01, Symantec NetBackup 7.x and Symantec Backup Exec 2012. StoreOnce interfaces with StoreOnce Catalyst The following diagram shows - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 60
the backup application controls the copy process and is aware of all the copies of the data held in Catalyst stores, solves many of the problems involved in Disaster Recovery scenarios involving replicated copies. No import is necessary because all entries for all copies of data already exist in the - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 61
Figure 33 Catalyst copy models Summary of Catalyst best practices HP StoreOnce Catalyst is a unique interface and is fundamentally different from virtual tape or NAS. It provides the backup application with full control of backup and replication (called Catalyst Copy). For this reason, best - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 62
the StoreOnce GUI Refer to the HP StoreOnce Backup system user guide or online help for detailed information about using the Catalyst jobs and blackout windows As with VTL and NAS replication, each StoreOnce appliance supports a maximum number of concurrent jobs. In this case, the parameters are - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 63
Figure 36 StoreOnce Catalyst Bandwidth limiting Client access permissions Catalyst stores have a process that allows client access to the Catalyst stores to be controlled. First overall client access permission checking is enabled from the StoreOnce Catalyst - Settings tab. Figure 37 Enabling client - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 64
Figure 38 Setting access permissions for a store More information HP StoreOnce Catalyst is a unique interface and is fundamentally different from virtual tape or NAS. It provides the backup application with full control of backup and replication (called Catalyst Copy). For this reason, best - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 65
type has an added benefit in that it is also clearly identified in most backup applications as a virtual tape library and so is easier for supportability. It is the recommended option for this reason. There are a number of other limitations from an infrastructure point of view that need to be - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 66
, it is recommended that the cartridge sizing matches that of the physical media to be used. Number of libraries per appliance The StoreOnce appliance supports the creation of multiple virtual library devices. If large amounts of data are being backed up from multiple hosts or for multiple disk LUNs - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 67
implementation, by default, does not allow block sizes that are greater than 256 KB. To use a block size greater than this you need to modify the following registry setting: nl nl HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\ nl {4D36E97B-E325-11CE-BFC1-08002BE10318}\0000\Parameters - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 68
rotation = 25 Each backup job effectively has its own virtual tape. Summary of VTL best practices NOTE: The HP StoreOnce B6200 Backup system supports only FC VTLs. • Make use of multiple network or Fibre Channel ports throughout your storage network to eliminate bottlenecks. • For FC configurations - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 69
• Tape drive emulation types have no effect on performance or functionality • Configuring multiple tape drives per library enables multi-streaming operations per library for good aggregate throughput performance. • Do not exceed the recommended maximum concurrent backup streams per library and - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 70
as targets for backup applications. Refer to the UNIX and Linux Configuration Guide for more information about the NFS interface. Backup application support NAS shares may be used with most applications that support backup to disk, including embedded applications, such as Oracle RMAN and VMWare - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 71
any combination of NAS and VTL devices. The following table illustrates some possible configurations. Table 7 Maximum number of virtual devices per service set VTL NAS Catalyst Total number of devices 48 0 0 48 (maximum) 0 48 0 48 (maximum) 0 0 48 48 (maximum) 24 24 0 48 (maximum - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 72
server as well as configuration changes to the backup application services. Individual users can then be assigned access to individual preferred option. Refer to the "HP StoreOnce Backup system user guide" for more information about configuring authentication. Backup application configuration The - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 73
When using a backup application with StoreOnce NAS shares the user will need to configure a new type of device in their backup application. Each application varies as to what it calls a backup device that is located on a StoreOnce device, for example it may be called a File Library, Backup to Disk - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 74
have had time to close before a new open request is sent). If backup failures occur, disabling buffered writes and reads may fix the problem, in which case, reducing the number of concurrent backup streams then re-enabling buffering will provide best performance. Overwrite versus append This setting - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 75
Appended backups should not be used because there is no benefit to using the append model, this does not save on disk space used. Compression and encryption Most backup applications provide the option to compress the backup data in software before sending, this should not be implemented. Software - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 76
mount options are used to ensure in-order delivery and provide better deduplication ratios. See the HP StoreOnce Linux and UNIX Configuration Guide for specific details. • Configure bonded network ports for best performance. • Monitor the number of files created in the share at regular intervals - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 77
can be selected as appliances. All mapping is done using the virtual IP addresses of the target and source service sets. Within this chapter the term appliance and service set are synonymous. What is replication? Replication is a standard term used to describe a way of synchronizing data between - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 78
StoreOnce VTL and NAS replication overview The StoreOnce Backup system utilizes a propriety protocol for replication traffic over the Ethernet ports; this protocol is optimized for deduplication-enabled replication traffic. An item (VTL Cartridge or NAS file) will be marked ready for replication as - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 79
Figure 40 Active to passive replication Figure 41 Active to active replication Replication usage models (VTL and NAS) 79 - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 80
Figure 42 Many to Once replication 80 Replication - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 81
Figure 43 N-way replication In most cases StoreOnce VTL and StoreOnce NAS replication is the same, the only significant configuration difference being that VTL replication allows multiple source libraries to replicate into a single target library, NAS mappings however are 1:1, one replication target - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 82
by creating media pools with the backup application then manually assigning source library cartridges into the relevant pools. For replication fan in/fan out Each StoreOnce model has a different level of support for the number of other StoreOnce appliances that can be involved in replication - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 83
source or target appliance in order to allow other operations (e.g. backup/restore) to have more available disk I/O. 2. The WAN Bandwidth is too low to support the number of concurrent jobs that may be running concurrently. It is recommended that a minimum WAN bandwidth of 2Mb/sec is available per - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 84
increase in WAN bandwidth provision by your telco can often alleviate this problem. • Using co-location where two devices are physically in the same deployment plan as it can sometimes be very time consuming or manually intensive work. The Sizing Tool calculates expected seeding times over Wan - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 85
backup. Replication models and seeding The diagrams in Replication usage models (VTL and NAS) (page 78) indicate the different replication models supported by HP StoreOnce Backup systems; the complexity of the replication models has a direct influence on which seeding process is best. For example - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 86
nl Best suited for StoreOnce VTL deployments. nl Unlikely to be used when seeding HP StoreOnce B6200 Backup systems. Relies on the backup application supporting the copy process, e.g. Media copy or "object" copy" or "duplicate" or "cloning" Reduced shipping costs of physical tape media over actual - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 87
Replication blackout windows The replication process can be delayed from running using blackout windows that may be configured using the StoreOnce GUI. Up to two separate windows per day, which are at different times for each day of the week, may be configured. The best practice is to set a blackout - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 88
malicious or accidental configuration of replication mappings from unknown or unauthorized source appliances. See the HP StoreOnce Backup system user guide for information on how to configure Source Appliance Permissions. Note the following changes to replication functionality when Source Appliance - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 89
12 Seeding methods in more detail While the concepts described in this chapter apply to all HP StoreOnce Backup systems, the diagrams in this chapter illustrate single node systems only. There is a separate chapter that illustrates how to implement replication and seeding with the HP StoreOnce B6200 - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 90
In the active-active replication model, WAN seeding after the first backup at each location is, in fact, the first wholesale replication in each direction. Figure 48 Seeding over a WAN link, active-active replication model 90 Seeding methods in more detail - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 91
In the Many-to-One model, WAN seeding over the first backup is, in fact, the first wholesale replication from the many remote sites to the Target site. Care must be taken not to run too many replications simultaneously or the Target site may become overloaded. Stagger the seeding process from each - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 92
Co-location (seed over LAN) The following diagram illustrates co-location seeding from a remote site to Data Center, in an active/passive replication model. The initial backup and replication takes place at the remote site over the LAN. The StoreOnce appliance holding the replicated data is then - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 93
The following diagram illustrates a many-to-one example. Figure 51 Co-location seeding in an Actve/Passive replication model 1. Initial backup at each remote site 2. Replication to Target StoreOnce appliance over GbE link at each remote site over LAN 3. Move Target StoreOnce appliance between - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 94
Floating StoreOnce seeding In this model co-location takes place at many remote sites using a floating StoreOnce target. The StoreOnce target is transported between may sites and the taken to the Data Center. It is a useful model for large-in fan scenarios. Figure 52 Seeding using floating StoreOnce - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 95
1. Plan the final master replication mappings from sources to target that are required and document them. Use an appropriate naming convention e.g. SVTL1, SNASshare1, TVTL1, TNASshare1. 2. At each remote site perform a full system backup to the source StoreOnce appliance and then configure a 1:1 - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 96
probably limited to 2 TB, in the case of physical LTO5 media it is limited to about 3 TB per tape, but of course multiple tapes are supported if a tape library is available. For USB disks, separate backup targets for disk devices would need to be created on each removable RDX drive because - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 97
but for seeding large volumes of sequential data this usage model is acceptable. Only HP Data Protector, Symantec NetBackup and Symantec Backup Exec support HP StoreOnce Catalyst - but Catalyst stores can be "copied" to Tape or USB Disk using object copy (DP), duplicate commands (NetBackup). Seeding - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 98
the HP B6200 StoreOnce implementation is that replication is part of the service set. Each service set (associated to Node 1, Node 2, et cetera) can . This means that replication continues without the need for manual intervention but performance may deteriorate. Possible ways to improve this - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 99
Figure 54 Using dedicated nodes for replication targets at the target site (Active/Passive replication) Active/Passive and Active/Active configurations 99 - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 100
Figure 55 Using dedicated nodes for replication targets at the target site for Active Passive, along with backup sources at Site B 100 Implementing replication with the HP B6200 Backup system - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 101
In Figure 56 we deliberately provide one node on each couplet that is dedicated to replication. This simplifies the management, and the loading and performance is easier to predict. The way the couplets are balanced also means that wherever a node fails over we do not lose all our replication - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 102
Many to One configurations The other main usage model for the HP B6200 Backup system is in large-scale remote office deployments where a fan-in of up to 384 replication jobs to a maximum-configuration HP B6200 Backup System is possible (one stream per device). The sources (remote offices) are more - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 103
the necessary data is already seeded on the B6200 for Remote Site A and the synchronization process happens very quickly. In some scenarios where a customer has larger remote storage locations the floating StoreOnce process can be used together with the smaller locations seeding over the WAN link. - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 104
all available nodes Replication and load balancing The specification for a B6200 service set is that it can accept up to a maximum of 48 what is required. Note that: • Each service set on each node is relatively at the same load (load balancing is a manual process) • Each node has a single function - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 105
• FC SAN 1 with its larger number of hosts and capacities is spread over four nodes all with maximum storage capacity. There are at least eight streams per node to provide good throughput performance • All the NAS target backups have been grouped together on node 5 and 6 on 10GbE - these could be - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 106
, large housekeeping loads are created if large numbers of cartridges are manually erased or re-formatted. In general all media overwrites should be HP B6200 Backup system, housekeeping blackout windows are configured per service set. Without a housekeeping blackout window set, the housekeeping - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 107
set on an appliance basis not an individual device type basis. NOTE: With the HP B6200 Backup system, housekeeping statistics are per service set. Figure 59 Housekeeping jobs received versus housekeeping jobs processed The Housekeeping load on the target replication devices is generally higher than - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 108
has been running nonstop for a couple of hours), therefore if housekeeping is idle most of the time no information will be displayed. Figure 60 Housekeeping load graph 1. Housekeeping under control 2. Housekeeping out of control, not being reduced over time In the above graph we show two examples, - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 109
This is when a physical tape library device is connected directly to the rear of the StoreOnce Backup system. This offload feature is not currently supported on HP StoreOnce Backup system. Backup application Tape Offload/Copy from StoreOnce Backup system This is the preferred way of moving data from - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 110
Tape Offload/Copy from StoreOnce Backup system versus Mirrored Backup from Data Source A summary of the supported methods is shown below. Table 9 Tape Offload/Copy For easiest integration nl Backup application copy to tape For optimum performance nl Separate physical tape mirrored - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 111
Figure 61 StoreOnce Catalyst Copy offload to tape drive 1. Catalyst Copy command 3. Rehydration and full bandwidth copy to tape 2. Low bandwidth Catalyst Copy VTL and NAS device types Figure 62 Backup application tape offload at StoreOnce target site for VTL and NAS device types 1. Backup data - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 112
data held on a VTL cartridge directly to a physical tape making an identical copy of the data. This type of tape offload generally does not support appending, therefore it is best practice to match the VTL cartridge size to the Physical cartridge size. (May Not Apply To All Backup Applications) 112 - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 113
HP StoreEver Tape Libraries HP Half-Height Tape Drives for LTO 5 and LTO 6 have equal Data Transfer Rates to the Full-Height versions. This allows an HP StoreEver MSL 2024 to have two Half-Height LTO Drives with no decrease in performance giving maximum "performance density". Backup Application To - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 114
HP MSL 4 8 ESL G3 5 9 ESL G3 6 11 StoreOnce 4048 4420 & 3 Shelves HP ESL G3 6 12 ESL G3 7 14 ESL G3 8 15 StoreOnce 4700 and 4430 HP ESL G3 6 12 ESL G3 7 14 ESL G3 8 15 StoreOnce 4700 and 4430 & 1 Shelf HP ESL G3 6 12 ESL G3 7 14 ESL G3 8 8 StoreOnce 4700 and - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 115
Target 2 4 6 8 16 16 16 16 16 32 48 64 96 192 288 384 32 64 96 128 96 192 288 384 Physical Tape Copy Support Supports direct attach of physical tape device Max Concurrent Tape Attach Jobs Appliance No N/A No N/A No N/A No N/A VTL Max VTL drives (384) and medium changers - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 116
Catalyst Command Sessions per service set = 64 128 256 384 512 Maximum Concurrent outbound copy jobs per 96 service set = 48 192 4 8 8 24 50 12 24 48 24 48 96 Physical Tape Copy Support Supports direct attach of physical tape device Max Concurrent Tape Attach Jobs Appliance No - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 117
Table 11 Key parameters for HP StoreOnce 2700, 4500 and 4700 Backup (continued) StoreOnce Backup products running software 3.8.0 and later StoreOnce 2700 StoreOnce 4500 StoreOnce 4700 VTL Max VTL Drives Per Library/Appliance 32 96 200 Max Cartridge Size (TB) 3.2 3.2 3.2 Max Slots Per - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 118
Rep Jobs 12 12 24 24 48 48 Source Max Appliance Concurrent Rep Jobs 24 48 48 48 96 96 Target Physical Tape Copy Support Supports direct attach of physical tape device Max Concurrent Tape Attach Jobs Appliance No N/A No N/A No N/A No N/A No N/A No N/A VTL Max VTL Drives Per - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 119
Table 12 Key parameters for HP StoreOnce 2610/2620, 4210/4220 and 4420/4430 Backup (continued) StoreOnce Backup products running software 3.4.0 and later StoreOnce 2610 nl iSCSI StoreOnce 2620 nl iSCSI StoreOnce 4210 nl iSCSI/FC StoreOnce 4220 StoreOnce 4420 StoreOnce 4430 StoreOnce Catalyst - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 120
• HP StoreOnce Backup system User Guide • HP StoreOnce Backup system Maintenance and Service Guide You can find these documents from the HP Support Center website: http://www.hp.com/support/ Query on your product name and then select the Product Manuals link. Document conventions and symbols Table - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 121
instructions. NOTE: Provides additional information. HP technical support For worldwide technical support information, see the HP support website: http://www.hp.com/support www.hp.com/support/manuals • http://www.hp.com/support/downloads Documentation feedback HP welcomes your feedback. HP technical - HP StoreOnce 4420 | HP StoreOnce Backup System Concepts and Configuration Guidel - Page 122
To make comments and suggestions about product documentation, please send a message to [email protected]. All submissions become the property of HP. 122
HP StoreOnce
Backup systems Concepts and Configuration
Guidelines
Abstract
If you are new to the HP StoreOnce Backup System, read this guide before you configure your system. It provides network and
Fibre Channel configuration guidelines, describes the StoreOnce VTL, NAS, StoreOnce Catalyst and Replication technology
and advises how to plan the workload being placed on the HP StoreOnce Backup System in order to optimize performance
and minimize the impact of backup, deduplication, replication and housekeeping operations competing for resources. The
information in this guide is valid for both single-node and multi-node G3 StoreOnce Backup systems, running software version
3.6.0 and later.
IMPORTANT:
Always check
h
t
tp://w
w
w
.hp
.co
m/su
ppo
r
t/man
uals
for the most up-to-date documentation for your product.
HP Part Number: BB877-90913
Published: November 2013
Edition: 4