HP D2D4106fc HP D2D Backup System Concepts guide (EH985-90915, March 2011)
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- HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 1
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 - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 2
Computer Software, Computer Software Documentation, and Technical Data for Commercial Items are licensed to the U.S. Government under vendor's standard commercial license. The information contained herein is subject to change without notice. The only warranties for HP products and services are - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 3
of users per CIFS share 14 Maximum number of hosts per NFS share (G2 products only 14 4 Data deduplication 15 What is data deduplication?...15 Data deduplication and the HP StoreOnce Backup System 15 Tape rotation example with data deduplication 16 5 Replication 18 Replication overview...18 HP - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 4
45 Tape spanning ...46 Replication 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 - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 5
(VTL) targets for backup applications. The total number of backup targets provided by an HP D2D Backup System is split between HP StoreOnce devices automatically make use of StoreOnce deduplication, ensuring efficient and cost-effective use of disk space. NAS targets for backup applications Support - HP D2D4106fc | 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 D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 7
are backup targets on the HP StoreOnce Backup System to which the backup application 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 - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 8
slots. When you configure your HP StoreOnce Backup System with a tape library, the drive emulation type that you select determines the default cartridge size for each configured slot. LTO-2 defaults to 200 GB, LTO-3 defaults to 400 GB, LTO-4 defaults to 800 GB and LTO-5 defaults to 1600 GB. This is - HP D2D4106fc | 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 D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 10
wizard has been run on Host 1. The HP D2D Backup System automatically generates a library for the host. The user may specify the number of slots during installation. Figure 1 Device configuration with one host • By default, only one device is visible to the host, the iSCSI library that has - HP D2D4106fc | 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 D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 12
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 or more)-use host - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 13
for replication. Operating system support Two interfaces are supported: • a CIFS 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 - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 14
appliance. Across the whole HP StoreOnce Backup System the number of simultaneously open files is HP D2D2503 25000 40 16 HP D2D2504 25000 112 48 HP D2D4004/9 HP D2D4112 25000 25000 40 112 24 48 Maximum number of users per CIFS share The maximum number of users that may be configured when using "user - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 15
by both replication and housekeeping. Without them, data cannot be restored successfully. Data deduplication and the HP StoreOnce Backup System Data deduplication is applied per library device or share. When you configure the library or share, it defaults to - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 16
data is written to the device. Benefits of HP D2D deduplication The main benefit is that it is 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 for remote backups, replication - HP D2D4106fc | 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 D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 18
take you through HP D2D Replication configuration steps. Replication and NAS Shares HP D2D Replication allows NAS shares that have been configured on one HP StoreOnce Backup System (the Source Appliance) to be replicated to corresponding NAS shares on another HP StoreOnce Backup System (the Target - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 19
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 as part of the D2D Replication license with HP D2D4xxx Backup - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 20
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 in both Source and - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 21
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 to only one - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 22
Each HP D2D 250x Series Source Appliance can replicate to up to two Target Appliances. Figure 7 HP D2D 2500 Fan OUT example Of course, the above is for illustration only. If your Company policy does not dictate geographically unique data centers, there's no reason why you could not support all four - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 23
running 4 projects. They have configured a Source Library for each project on their HP D2D. Each set of 4 libraries can be mapped to a single library on the Target Appliance at the Data Center. The ability to replicate slots from up to 4 libraries on Source Appliances into a single Target Library - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 24
those libraries into a single HP D2D 4xxx series Target Library. Figure 9 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, you may decide to - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 25
number of 8 jobs concurrent replication jobs from a source appliance HP D2D 4106/4112 4 D2D4106: 16 D2D4112: 24 1 8 8 24 HP D2D 4312/4324 8 50 1 Maximum number of Target appliances supported by one Source appliance Maximum number of Source appliances supported by one Target appliance Maximum - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 26
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 all Replication-Source libraries and shares are being replicated to matching Replication-Target libraries and shares on the HP StoreOnce Backup System in Office - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 27
from local host machines. In the data center there is a larger StoreOnce Backup System 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 - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 28
one replication example Replication Licensing The Replication License is a single software license; it is unique to a single HP StoreOnce Backup System and is required on every appliance that will be used as a Replication Target. If you wish to replicate data to multiple HP StoreOnce Backup Systems - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 29
HP Licensing website, please be sure to include your HP StoreOnce Backup System serial number on the form. NOTE: The LTU is tied uniquely to the serial number of your HP D2D the replication job from the Local Settings on the Web Management Interface, see the HP StoreOnce Backup System user guide. - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 30
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 replication pairing or from the Local Appliance's General - HP D2D4106fc | 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 D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 32
D2D appliance. You MUST break this mapping BEFORE carrying out recovery. If you do not, the now blank Source Share or Library (on the replacement disks) will overwrite the data on the Target Share on Library. You will, effectively, lose backup data on both Source and Target devices. 32 Replication - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 33
housekeeping? If data is deleted from the D2D system (e.g a virtual cartridge is overwritten or 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 D2D4106fc | 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 D2D4106fc | 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 detailed guidance. StoreOnce key processes Key processes are: • Backup with deduplication • Replication • Housekeeping By default replication will - HP D2D4106fc | 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 D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 37
support varies by software vendor. F Fibre Channel (FC) Fibre Channel (FC) supports network connectivity over fibre optic cabling or copper wiring. FC has a different set of standards and network connection protocol to Ethernet and different configuration requirements. FC HP StoreOnce Backup - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 38
HP StoreOnce Backup System Installation and Configuration Guide. Linux and UNIX users should also refer to the Linux and UNIX Configuration Guide on the HP StoreOnce Backup tape drive. (It may be necessary to upgrade your backup application to support libraries.) M Mail slots (import/export elements - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 39
fails, the online spare disk immediately takes its place. Replication is a standard term used to describe a way of synchronizing data between hardware in two physical locations. HP StoreOnce Replication allows users to replicate data from cartridges on one HP StoreOnce Backup System to mapped slots - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 40
is that copied data remains on the G1 HP D2D Backup System; exported data is removed from it, but can be imported easily when required. These functions are grouped under the Tape Attach section of the Web Interface. G2 HP StoreOnce Backup Systems do not support direct export to tape. Tape rotation - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 41
to G1 HP D2D Backup Systems, allowing the user to store backups offsite. Always refer to http://www.hp.com/ go/connect or http://www.hp.com/go/ebs to find out which tape library and tape drive models are supported. Both SAS and SCSI library and tape devices are supported and require installation of - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 42
is not available. When would Copy be used? Cartridge copies are likely to be appropriate when the user wishes to use the HP D2D Backup System for all foreseeable restore processes but requires an additional offsite copy for insurance or data security purposes. This may mean that weekly, monthly and - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 43
cartridge is required in order to be able to decide whether the data on the copied cartridge is useful. • The whole HP D2D Backup System or a complete library on the HP D2D is accidentally removed from the Web Management interface. The physical copy of the cartridge is the only copy now in existence - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 44
any cartridges.) CAUTION: Do not export cartridges that the backup application uses on a frequent basis as part of a rotation strategy because it will not be able exports are likely to be used when the user wishes to free up space on the HP D2D Backup System by exporting to physical tape a cartridge - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 45
available to the backup application, but this can make backup jobs slower to run. However, once software compression has been applied, the data is not further compressed when it is exported to a physical tape directly attached to the HP D2D Backup System. This ensures that the user knows exactly how - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 46
on the HP D2D Backup System can be copied or exported at a time; it is not possible to select multiple slots and copy them to a single physical cartridge. Replication and Tape Attach Tape Attach is particularly useful in two instances, if you have installed the optional replication license and - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 47
purchased and installed the administrator is able to recover the server data using tape before purchasing and re-installing a new D2D device in the remote office. This procedure only applies if a tape library or tape drive is physically attached to the Data Center D2D appliance. Replication and Tape - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 48
guide This guide provides information 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 - HP D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 49
by 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 - HP D2D4106fc | 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 D2D4106fc | HP D2D Backup System Concepts guide (EH985-90915, March 2011) - Page 51
conventions, 48 related documentation, 48 documentation HP website, 48 providing feedback, 50 E EML backup application support, 13 comparing with VTL, 6 maximum files, 13 maximum hosts per NFS share, 14 maximum shares, 13 maximum users per CIFS share, 14 OS support, 13 NAS shares, 13 replication - HP D2D4106fc | 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