HP D2D HP D2D Backup System Concepts guide (EH985-90915, March 2011)
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- HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 1
HP StoreOnce Backup System Concepts Guide Abstract If you are new to the HP StoreOnce Backup System, it is a good idea to read this guide before you configure your system. It describes the StoreOnce technology and advises how to plan the workload being placed on the HP StoreOnce Backup System in - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 2
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 for technical or editorial errors - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 3
11 Zoning...12 3 NAS shares 13 Operating system support...13 Backup application support...13 Maximum number of NAS shares 13 Maximum HP StoreOnce Backup System 15 Tape rotation example with data deduplication 16 5 Replication 18 Replication overview...18 HP StorageWorks Replication Manager (HP - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 4
and Tape Attach...46 About this guide 48 Intended audience...48 Related documentation...48 Document conventions and symbols 48 HP technical support...49 Customer self repair...49 Registering your HP D2D Backup System 49 Subscription service...49 HP websites...50 Documentation feedback...50 Index - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 5
(FC) devices. (The HP D2D4106i Backup System does not support FC.) The HP D2D2500 Series is configured with iSCSI devices. The default configuration emulates: • HP D2D2500 Series: HP StorageWorks 1/8 G2 Ultrium Tape Autoloader • HP D2D4100 and D2D4300 Series: HP StorageWorks MSL2024 Tape Library - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 6
chapters in this guide provide more background information about VTL and NAS devices and the specifications that are supported. For information about using the Web Management Interface to configure and monitor devices, refer to the HP StoreOnce D2D Backup System user guide. 6 Before you start - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 7
strategies. (It may be necessary to upgrade your backup application to support libraries.) Emulation types The HP D2D Backup System supports a wide range of library and drive emulation types. The options available vary according to the HP D2D Backup System model. If the emulation type is not in the - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 8
that use a large number of cartridges devices. This emulation type is widely supported by backup applications. • MSL G3 series (8x96) Library: This is a tape used to configure devices and slots. When you configure your HP StoreOnce Backup System with a tape library, the drive emulation type that you - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 9
D2D4112 24 4 144 NOTE: It is only possible to exceed the maximum physical limitation when configuring the HP D2D4112 Backup System. Flexible emulation (G2 products only) If supported, the ESL, EML and D2DBS emulations are particularly flexible because they allow you to configure a large number of - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 10
emulation types (some products do not support all emulation types). VTL devices on an Ethernet network Each emulated backup device is uniquely mapped to an host may have multiple devices configured for it on the HP D2D Backup System, but this means fewer hosts may be connected (not illustrated - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 11
is working correctly and check the integrity of the replicated backup by doing a test restore • To perform manual tape copy jobs to a tape device on the network using the backup application See the HP StoreOnce D2D Backup System user guide for more information about using this feature. VTL devices - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 12
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 multipath software and tape devices). • Large fabric (128 ports - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 13
interface for Windows networks • a NFS interface for Linux and UNIX networks NOTE: G1 HP D2D Backup Systems support only the CIFS interface for Windows networks. See the HP StoreOnce Backup System user guide for more information about using the Web Management Interface to create and configure NAS - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 14
or smaller than the deduplication threshold that are allowed per appliance. Across the whole HP StoreOnce Backup System the number of simultaneously open files is as follows: Table 4 Maximum number of files G2 products HP D2D2502 Max files per share 25000 Max Total Open files 96 per appliance Max - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 15
which reduces the volume of data stored significantly. Figure 3 Data stored after deduplication The importance of the Index files As a backup stream arrives at the HP StoreOnce Backup System the stream of data is "chunked" into nominal 4K chunks, a hashing algorithm is run on each of these 4K chunks - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 16
storage capacity by eliminating duplicate data • Reduces disk expenditures by reducing storage space required. You can get more backups for each host on the same size of storage (HP StoreOnce device) • Prolongs disk data retention periods • Reduces the volume of data that must be sent across a WAN - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 17
savings, example 1 1st daily full backup 1st daily incremental backup 2nd daily incremental backup 3rd daily incremental backup 4th daily incremental backup 5th daily incremental backup 2nd weekly full backup 3rd weekly full backup 25th weekly full backup TOTAL Data stored normally 500 GB 50 - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 18
to be synchronizing data between different models of HP StoreOnce Backup Systems. The examples in this section are not specific to a particular model of HP StoreOnce Backup System. In this chapter: • Replication overview • HP StorageWorks Replication Manager • Replication concepts and terminology - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 19
to a list of sources that are allowed to replicate to it. See the HP StoreOnce Backup System user guide for details. HP StorageWorks Replication Manager (HP D2D4xxx Series only) HP StorageWorks D2D Replication Manager (D2D Replication Manager) is a standalone software application that is available - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 20
libraries are not visible to the host, unless you configure devices to make it visible. See Backup applications and Replication Target libraries. A single HP StoreOnce Backup System may host both Replication-Source and Replication-Target shares and libraries and can, therefore, act simultaneously - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 21
. Fan OUT When we talk about FAN OUT, we are considering the number of replication Target Appliances that are supported from that Source Appliance (the HP StoreOnce Backup System that contains the shares and libraries that you wish to replicate). Each share on the Source Appliance may be mapped - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 22
of replication Source Appliances that are supported. HP D2D250x Series • Each HP D2D2502 Target Appliance can support up to four Source Appliances. • Each HP D2D2503 Target Appliance can support up to six Source Appliances. • Each HP D2D2504 Target Appliance can support up to eight Source Appliances - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 23
HP D2D4xxx Series • Each HP D2D4004/4009 or HP D2D4106 Target Appliance can support up to 16 Source Appliances. • Each HP D2D4112 Target Appliance can support up to 24 Source Appliances. • Each HP D2D4312 Target Appliance can support data; for example, common operating system files. • Remote Site 2 - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 24
collections from those libraries into a single HP D2D 4xxx series Target Library. • Remote HP D2D4xxx series Fan IN example, using libraries Fan IN and slot mapping: You may not want to replicate all the slots in a library. For example, if you have weekly full backups and daily incremental backups - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 25
can run concurrently. See the appropriate entry in the table below. Table 7 Fan In, Fan Out and job concurrency rules, G2 products HP D2D 2502/2504 Appliance Fan Out Maximum number of 2 Target appliances supported by one Source appliance Appliance Fan In Maximum number of Source appliances - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 26
One Active to Passive example In the following example there are two offices, each with an HP StoreOnce Backup System. The HP StoreOnce Backup System in Office A is being used by the host server for backup and restore and the shares and libraries that have been configured on it are being replicated - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 27
that is used solely to host Replication-Target Libraries and Shares for the remote offices. A replication license is required only for the HP StoreOnce Backup System in the Data Center. That license covers all Replication-Target libraries and shares. This is also a good example of slot mapping - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 28
, you require a separate license for each target appliance, appropriate to the model type, and must repeat the activation process for each HP StoreOnce Backup System. NOTE: The Replication license can only be used on the model for which it was purchased. For example, the Replication License for - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 29
Appliance All Replication status and configuration pages are available from the Replication tab on the Web Management Interface. See the HP StoreOnce Backup System user guide for information about using the Replication wizard to configure mappings to virtual tape devices and NAS shares. Seeding the - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 30
will need to open (TCP) ports 9387 (Command protocol) and 9388 (Data protocol) to allow the replication traffic to pass to and from the HP StoreOnce Backup Systems. If necessary and the D2Ds conflict with another device on the network, these ports can be changed from the defaults when you create the - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 31
Figure 14 New host server and D2D hardware has been purchased and installed and the administrator now wants to recover data to the D2D and then restore to the host server. Before the failure a mapping existed between a Source Share or Library on the remote site D2D and a Target Share or Library on - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 32
is broken to promote the share or library. IMPORTANT: This configuration is possible in only limited situations because it will break any other backups or replications to the Data Center appliance. In a simple Active-Passive scenario, however, this may be a very good model. IMPORTANT: If you replace - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 33
? If data is deleted from the D2D system (e.g a virtual cartridge is overwritten or erased backups, restores, tape offload jobs or replication. In order to avoid this problem backup application overwrites two cartridges in different virtual libraries with 400 GB of data on each cartridge, an HP - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 34
. See the HP StoreOnce Backup System user guide for details. For more information This is a complex subject. We strongly recommend that you read HP D2D Backup Systems best practices for VTL, NAS and Replication implementations that is available on http:www.hp.com/ support/manuals for more detailed - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 35
you read HP D2D Backup Systems best practices for VTL, NAS and Replication implementations that is available on http:www.hp.com/support/ manuals for more to schedule backups, replication blackout windows and housekeeping blackout windows, refer to the HP StoreOnce Backup System user guide. Balancing - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 36
streams to 24 drives on a single library provides the best deduplication ratio. To be avoided • Do not delete and eject cartridges • Avoid housekeeping jobs during backup • Avoid running a lot of small incremental - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 37
is a protocol for interfacing to hosts on a Windows network. The HP StoreOnce Backup System supports this interface for connecting to NAS targets from a Windows network. Data deduplication compares blocks of data being written to the backup device with data blocks previously stored on the device. If - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 38
when the user runs an Import job. Mail slots have no practical usage with G2 HP StoreOnce Backup Systems because direct export to tape is not supported. N NAS Shares Devices on HP StoreOnce Backup Systems may be configured as Virtual Tape devices or as NAS (Network Attached Storage) targets for - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 39
that network traffic is minimized. See also the HP StoreOnce Backup System Concepts Guide. The physical storage capacity of the HP StoreOnce Backup System is: • HP D2D2502: 2 TB (4 x 500 GB); HP D2D2503: 3 TB (4 x 750 GB); HP D2D2504: 4 TB (4 x 1 TB) • HP D2D4106: 6 TB (12 x 500 GB). One additional - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 40
Interface. G2 HP StoreOnce Backup Systems do not support direct export to tape. Tape rotation strategies determine when backups are run, HP StoreOnce Backup System Concepts Guide for example configurations. Virtual Tape Devices are backup targets on the HP StoreOnce Backup System to which the backup - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 41
create and run manual and scheduled jobs. NOTE: Physical tape storage devices attached to the HP D2D Backup System can only be accessed by the HP D2D Backup System using the Tape Attach pages. They do not appear as attached network devices to the host system. • Attach a supported tape storage device - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 42
to a cartridge on the library device in the HP D2D Backup System. The Web Management Interface on the HP D2D Backup System is used to Copy the cartridge from the HP D2D Backup System to the attached tape storage device, leaving the data on the HP D2D Backup System so that it is available for quick - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 43
slot becomes empty. (If the export fails, the data remains in the mail slot.) Export removes the data and frees up disk space on the HP D2D Backup System and is useful for long term archival (for example in a yearly tape in a rotation scheme). If restore is needed, data can be imported (or - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 44
into a firesafe. Only a single copy of the cartridge exists. It is on physical tape and no longer on the cartridge in the HP D2D Backup System. The backup application is fully aware that the cartridge location is now offsite, so cannot overwrite it without explicitly asking for the cartridge to be - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 45
it is important to be aware that the cartridge maximum size is the native size (without compression). HP StorageWorks tape drives apply hardware compression, therefore, the data from the HP D2D Backup System is likely to require less space on a physical tape cartridge. When moving data to a physical - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 46
always reported correctly. Tape spanning Spanning of multiple physical cartridges from a single cartridge in the HP D2D Backup System is not supported. The data from the cartridge on the HP D2D Backup System must not exceed the capacity of the physical cartridge on the attached tape storage device - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 47
6. Normal replication across the WAN can now take place with only new or changed data needing to be replicated. NOTE: This method also works in reverse to allow recovery from physical media directly to the host server (libraries only). When new server hardware has been purchased and installed the - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 48
about: • Installing the HP StoreOnce D2D Backup System • Using the HP StoreOnce D2D Backup System • Troubleshooting the HP StoreOnce D2D Backup System Intended audience This guide is intended for users who install, operate and maintain the HP StoreOnce D2D Backup System. Related documentation In - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 49
CSR. For more information about CSR, contact your local service provider. For North America, see the CSR website: http://www.hp.com/go/selfrepair Registering your HP D2D Backup System Once you have installed and tested your HP D2D Backup System please take a few minutes to register your product. You - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 50
, see the following HP websites: • http://www.hp.com • http://www.hp.com/go/ebs • http://www.hp.com/go/connect • http://www.hp.com/go/storage • http://www.hp.com/service_locator • http://www.hp.com/support/manuals • http://www.hp.com/support/downloads Documentation feedback HP welcomes your feedback - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 51
from D2D Backup System, 42 audience, 48 B backup targets, 5 , 7, 10 fibre channel, 11 housekeeping, 33 HP technical support, 49 HP 1x8 G2 Autoloader, 8 I import cartridge, 43 , 8 MSL G3 series (8x96) Library, 8 N NAS backup application support, 13 comparing with VTL, 6 maximum files, 13 maximum hosts - HP D2D | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 52
, 46 StoreOnce Backup System definition, 5 StoreOnce key processes, 35 Subscriber's Choice, HP, 49 symbols in text, 49 T tape attach modes of operation, 42 tape rotation example, 16 tape spanning, 46 target appliance, 20 target libraries making visible, 11 technical support HP, 49 service locator
HP StoreOnce
Backup System Concepts Guide
Abstract
If you are new to the HP StoreOnce Backup System, it is a good idea to read this guide before you configure your system. It
describes the StoreOnce 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 deduplication, replication and housekeeping operations competing
for resources.
IMPORTANT:
The localized versions of this guide have been produced prior to launch. The English version that is available
on the web at launch may have later updates. 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: EH985-90915
Published: February 2011
Edition: 1