HP Storage Mirroring V5 Software - Manual (Page 38)

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Configuring Advanced
Settings
When configuring a protection or recovery job, you can set data transmission and e-mail notification
options. For a recovery job, you can also set existing protection settings. You can access these
options from the Protection Summary or Recovery Summary page of the job creation workflow.
Compression
To help reduce the amount of bandwidth needed to transmit Server Image Copy data, compression
allows you to compress data prior to transmitting it across the network. In a WAN environment this
provides optimal use of your network resources. If compression is enabled, the data is compressed
before it is transmitted from the source. When the target receives the compressed data, it
uncompresses it and then writes it to disk.
By default, compression is set to None, which means it is disabled. The compression levels can be
set at Minimum, Medium, or Maximum. Each level requires more overhead than the previous level
of compression. If you notice an impact on performance while compression is enabled in your
environment, either adjust to a lower level of compression or leave compression disabled.
Bandwidth limiting
Bandwidth limitations are available to restrict the amount of network bandwidth used for Server
Image Copy data transmissions. When a bandwidth limit is specified, Server Image Copy never
exceeds that allotted amount. The bandwidth not in use by Server Image Copy is available for all
other network traffic.

Do not limit bandwidth—Server Image Copy will transmit data using 100% bandwidth
availability.

Place this limit on the bandwidth—Enter a value in kilobytes per second to limit data
transmission. This is the maximum amount of data that will be transmitted per second.
NOTE: Bandwidth limiting is maintained for each target. Therefore, all jobs to the same target
will have the same bandwidth limitations imposed.