HP StoreOnce 4430 HP D2D Backup System Concepts guide (EH985-90915, March 2011 - Page 13

NAS shares, Operating system support, Backup application support, Maximum number of NAS shares - user guide

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3 NAS shares In this chapter: • Operating system support • Backup application support • Maximum number of NAS shares • Maximum number of files per NAS share and appliance • Maximum number of hosts per NFS share NOTE: It is important to understand that the HP StoreOnce network share is intended to be used ONLY by backup applications that "back up to disk". Do not use the NAS target device as a drag-and-drop general file store. The one exception to this rule is if you are using the NAS share to seed an appliance 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 more information about using the Web Management Interface to create and configure NAS shares 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 VCB Agent. For the most up-to-date information about supported applications, refer to http://www.hp.com/go/connect and http://www.hp.com/ go/ebs. Maximum number of NAS shares The total number of "devices" provided by a StoreOnce appliance is split between VTL devices and NAS shares. These devices may be all VTL, all NAS or any combination of NAS and VTL devices. Maximum number of files per NAS share and appliance The HP StoreOnce NAS implementation is optimized for use with backup applications. These applications create large backup files on the NAS share, which make much more efficient use of deduplication than simply copying files of various sizes to a deduplicating share. To improve performance for small metadata files created by backup applications and to allow random access to the header information at the beginning of backup files, the first 24 MB of any backed up file will not be deduplicated. This non-deduplicated region is called the deduplication threshold. The HP StoreOnce Backup System imposes a limit on the number of files that can be stored on each NAS share. The limit is 25000 files, which provides the ability to protect a large amount of data using a backup application. The limit is imposed in order to allow efficient use of data replication. Operating system support 13

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3 NAS shares
In this chapter:
•
Operating system support
•
Backup application support
•
Maximum number of NAS shares
•
Maximum number of files per NAS share and appliance
•
Maximum number of hosts per NFS share
NOTE:
It is important to understand that the HP StoreOnce network share is intended to be used
ONLY by backup applications that “back up to disk”. Do
not
use the NAS target device as a
drag-and-drop general file store. The one exception to this rule is if you are using the NAS share
to seed an appliance 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 more information about using the Web
Management Interface to create and configure NAS shares 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 VCB Agent. For the most up-to-date information
about supported applications, refer to
h
t
tp://w
w
w
.hp
.co
m/go/co
nnec
t
and
h
t
tp://w
w
w
.hp
.co
m/
go/eb
s
.
Maximum number of NAS shares
The total number of “devices” provided by a StoreOnce appliance is split between VTL devices
and NAS shares. These devices may be all VTL, all NAS or any combination of NAS and VTL
devices.
Maximum number of files per NAS share and appliance
The HP StoreOnce NAS implementation is optimized for use with backup applications. These
applications create large backup files on the NAS share, which make much more efficient use of
deduplication than simply copying files of various sizes to a deduplicating share. To improve
performance for small metadata files created by backup applications and to allow random access
to the header information at the beginning of backup files, the first 24 MB of any backed up file
will not be deduplicated. This non-deduplicated region is called the deduplication threshold.
The HP StoreOnce Backup System imposes a limit on the number of files that can be stored on
each NAS share. The limit is 25000 files, which provides the ability to protect a large amount of
data using a backup application. The limit is imposed in order to allow efficient use of data
replication.
Operating system support
13