The maximum number of concurrent replication jobs supported by source and target D2D appliances can be varied in the Web Management Interface to manage throughput. The table below shows the default settings for each product. Fan in is the maximum number of source appliances that may replicate to the device as a replication target.
|
Model
|
Fan in
|
Maximum number concurrent Source jobs
|
Maximum number concurrent target jobs
|
|
D2D4324
|
50
|
16
|
48
|
Data compression and encryption backup application features
Ensure that there is no encryption of data before it is sent to the D2D appliance.
Ensure that software compression is turned off within the backup application.
10Gbit Ethernet ports on the 4312/4324 appliances
10Gbit Ethernet is provided as a viable alternative to the Fibre Channel interface for providing maximum VTL performance and also comparable NAS performance.
Best practices for network and Fibre Channel configuration – page 22
Tape library emulation
For iSCSI VTL devices a single Windows or Linux host can only access a maximum of 64 devices. A single library with 63 drives is the most that a single host can access. Configuring a single library with more than 63 drives will result in not all devices in the library being seen (which may include the library device).
A similar limitation exists for Fibre Channel. Although there is a theoretical limit of 255 devices per FC port on a host or switch, the actual limit appears to be 128 for many switches and HBAs. You should either balance drives across FC ports or configure less than 128 drives per library.
Cartridge sizing
The size of a virtual cartridge has no impact on its performance; it is recommended that cartridges are created to match the amount of data being backed up. For example, if a full backup is 500 GB, the next larger configurable cartridge size is 800 GB, so this should be selected.
HP also provides a downloadable tool to assist in the sizing of D2D-based data protection solutions at http://www.hp.com/go/storageworks/sizer.
For more details please go through the document in the link :
