HP Storage Mirroring Software - Manual (Page 615)

Recommended optimizations Page 614 of 677
Installation
Make sure you review all of the Storage Mirroring Recover requirements , including the
general source and target requirements and the requirements that are specific to your
workload type. When you perform the installation, you will have several decisions to
make.
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Login—Always log on to the server with an account that is in the local
Administrators group before starting the installation.
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Components—Decide what components to install and where to install them.
Keep in mind that server components are required for systems that will function as
a source or target, and they require an activation code for the service to run. Client
components do not require an activation code, but are required to administer
Storage Mirroring Recover servers throughout your environment.
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Activation code—The activation code that is required for each server is a 24-
character, alpha-numeric code which applies the appropriate license to your
installation.
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Queues—The installation will prompt you to select memory queue and disk queue
settings. Storage Mirroring Recover uses system memory to store data in queues.
When the Storage Mirroring Recover system memory queue is exhausted, Storage
Mirroring Recover will queue to disk.
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If you set the system memory queue lower, Storage Mirroring Recover will
use less system memory, but you will queue to disk sooner which may
impact system performance. If you set it higher, Storage Mirroring Recover
will maximize system performance by not queuing to disk as soon, but the
system may have to swap the memory to disk if the system memory is not
available. In general, the amount of memory Storage Mirroring Recover and
other applications on the server are configured to use should be less than the
amount of physical memory on the system to prevent low memory conditions.
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Select your disk queue location for optimal performance. For example, do not
put it on the same physical device as the data being replicated. If possible,
put it on a dedicated array optimized for writing. If you expect large amounts
of disk queuing, you may want to increase the size of the queue files from the
default of 5 MB to 50 MB for more efficient queuing. This option is available
under HKEY_LOCAL_MACHINE\SOFTWARE\NSISoftware\Double-
Take\CurrentVersion\QJournalFileSize. The value is hexadecimal. See
Server Settings in the Scripting Guide for more details on this option.
See Queuing data for more details on the memory and disk queues.