Enable compression, Blackberry settings, Enable compression -12 – HP Storage Mirroring V4.5 Software User Manual
Page 118: Blackberry settings -12
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Checksum—
(Default) This option performs a checksum comparison calculation. A checksum
calculation is a formula applied to blocks of data to determine if the binary make-up of the block
is identical. If the checksums on the source and target machine are the same, the block is skipped.
If the checksums on the source and target machine are not the same, the block on the source is
sent to the target. With this option, the entire file is not overwritten; only the block that is received
from the source is overwritten.
Enable compression
This setting enables compression of data that is transmitted from the source to the target. Significant
improvements in bandwidth utilization have been seen in Wide Area Network (WAN) configurations
or in any case where network bandwidth is a constraint.
Compression may be used in Local Area Network (LAN) configurations, though it may not provide any
significant network improvements.
You can specify compression for different source/target connections, but all connections to the same
target will have the same compression settings.
By default, compression is disabled. To enable it, select Enable Compression, then set the level
from minimum to maximum compression.
BlackBerry settings
The BlackBerry tab includes options to protect the BlackBerry application.
1.
Select Protect MDS services if you want to protect the MDS services.
2.
In the BlackBerry Services area, Application Manager will determine the appropriate
BlackBerry services to start/stop based on your operating system/BlackBerry configuration. You
should only modify this selection if there are additional services that need to be started along
with BlackBerry during the failover/failback process.
Modifying the default configuration for services may affect whether data can be successfully
replicated. Do not modify the services to start/stop unless you are very familiar with Storage
Mirroring and BlackBerry.
NOTE:
The Mirror type setting also applies to the restoration connection.