HP StorageWorks Storage Mirroring scripting guide (T2558-96074, February 2008)

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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.
QmemoryBufferMax 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
QueryOnQuorumFile identifies if the Storage Mirroring service will reopen closed files on the quorum drive
Values:
0 The Storage Mirroring service will not attempt to reopen a closed file on the quroum
drive to get security descriptors or last modified times.
1 The Storage Mirroring service will attempt to reopen a closed file on the quroum drive to get
security descriptors or last modified times.
Default:
1
GUI Setting
: None
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
Registered This entry is no longer used.
RemoveAllOrphans Specifies if all orphan files will be removed or only those based on RemoveOrphanTime
Values:
0 Remove orphans based on the entry RemoveOrphansTime
1 Remove all orphans
Default:
1
GUI Setting
: Connection/Restoration Manager, Orphans tab, Remove All Orphans
Server Setting Description