HP Storage Mirroring Software - Manual (Page 80)

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Configuring queuing
There are five queuing parameters available for configuration. Use the get and set commands to view or modify an option.
See Storage Mirroring Commands on page A-1 for complete command syntax.
! QJournalDir —This is the location where the queue is stored. For best results and reliability, you should select a
dedicated, non-boot volume. The queue should be stored on a fixed, local NTFS volume.
! QJournalFileSize —This is the size, in MB, of each queuing transaction log file. By default, the file size is 5 MB.
! QmemoryBufferMax —This is the amount of Windows system memory, in MB, that, when exceeded, will trigger queuing
to disk. This value is dependent on the amount of physical memory available but has a minimum of 32 MB. By default,
128 MB of memory will be used.
! QJournalSpaceMax —This is the maximum amount of disk space, in MB, in the specified QJournalDir that can be used
for Storage Mirroring queuing. When this limit is reached, Storage Mirroring will automatically begin the auto-disconnect
process. By default, Storage Mirroring will use an unlimited amount of disk space equivalent to 4,294,967,295 MB.This
unlimited setting allows the disk queue usage to automatically expand whenever the available disk space expands. Setting
this value to zero (
0 ) disables disk queuing.
! QJournalFreeSpaceMin —This is the minimum amount of disk space, in MB, in the specified QJournalDir that must be
available at all times. By default, 50 MB of disk space will always remain free. The QJournalFreeSpaceMin should be less
than the amount of physical disk space minus
QJournalSpaceMax .
! QueueSizeAlertThreshold —This is a percentage that identifies the amount of the queue that must be in use to trigger
an alert message in the Windows Event Viewer. By default, the alert will be generated when the queue reaches 50%.
NOTE: The QJournalSpaceMax and QJournalFree SpaceMin settings work in conjunction with each other. For
example, assume your queues are stored on a 10 GB disk with the QJournalSpaceMax set to 10 GB and
the QJournalFreeSpaceMin set to 500 MB. If another program uses 5 GB, Storage Mirroring will only be
able to use 4.5 GB so that 500 MB remains free.