HP StorageWorks Storage Mirroring for Linux Scripting Guide (T2558-96319, June 2009)

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QJournalFree
SpaceMin
The minimum amount of disk space, in MB, in the specified
QJournalDir
that must be available at all times.
Values: dependent on the amount of physical disk space available
Default: 50
GUI Setting: Server Properties, Queue tab, Memory and Disk Usage,
Minimum Free Space
The QJournalFreeSpaceMin should be less than the amount of physical disk
space minus
QJournalSpaceMax.
QJournalPreload The number of operations being pulled from the disk queue at one time. Do
not modify this setting.
QJournalSpaceMax
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.
Values: dependent on the amount of physical disk space available
Default: Unlimited
GUI Setting: Server Properties, Queue tab, Memory and Disk Usage,
Maximum disk space for queue
The unlimited setting allows the disk queue usage to automatically expand
whenever the available disk space expands. Setting this option to zero (
0)
disables disk queuing.
Even if you are using the
Unlimited option, Storage Mirroring will only store
16,384 log files. If you are using the default 5MB file size, this is
approximately 80GB of data. If you anticipate needing to be able to queue
more data than this, you should increase the size of the log files.
QLogWriteThrough Specifies if the disk queues are write-through mode
Values:
0 Disk queues are not write-through mode
1 Disk queues are write-through mode
Default:
0
GUI Setting: None
While write-through mode may decrease the frequency of auto-disconnects,
it may also decrease the performance of the source server.
QmemoryBuffer
Max
The amount of Windows system memory, in MB, that, when exceeded, will
trigger queuing to disk.
Values: dependent on the amount of physical memory available; minimum
of 32 MB
Default: 128 or 512 MB, depending on your operating system
GUI Setting: Server Properties, Queue tab, Memory and Disk Usage,
Maximum system memory for queue
QueueSizeAlert
Threshold
The percentage of the queue that must be in use to trigger an alert message
in the Windows Event Viewer.
Values: any valid percentage
Default: 50
GUI Setting: Server Properties, Queue tab, Queue Usage Alert Threshold,
Alert at following queue usage percentage
Server Setting Description