HP Storage Mirroring Software - Manual (Page 246)

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MemoryAllocator
CallbackMode Determines what action is taken when the MemoryQueueToDiskThreshold is met
Values: ( 0 ) Auto-disconnect—Auto-disconnect processing is initiated when the
MemoryQueueToDiskThreshold has been met. Connections will be reestablished
when auto-reconnect occurs.
( 1 ) Pause—The Storage Mirroring service stops pulling operations from the driver when the
MemoryQueue ToDiskThreshold has been met. The target will pause the source.
The service will resume pulling operations when the target tells the source to
resume.
( 2 ) Queue—The source and target begin queuing operations to disk.
Default: 2
GUI Setting : None
MemoryQueueToDisk
Threshold A percentage of QmemoryBufferMax that will trigger queueing to disk.
Values: any valid percentage
Default: 100
GUI Setting : None
MirrorChunkSize Block size (in bytes) used in the mirroring process
Values: 1 - 1048576
Default: 32768 (32K)
GUI Setting : Server Properties, Source tab, Mirror Queue, Size of Mirror Packets
A higher block size value gives you better throughput, but only to a certain point, then it starts
using more memory (this has to do with the way memory is allocated and deallocated). A lower
block size value produces slower throughput, but uses memory efficiently. The optimal value is
32768.
MirrorEncryptedFiles Specifies if Windows 200x encrypted files are mirrored
Values: ( 0 ) Encrypted files are not mirrored
( 1 ) Encrypted files are mirrored
Default: 1
GUI Setting : None
MirrorOverwrite Determines if the mirror process overwrites existing files
Values: (0) never overwrite
( 1 ) always overwrite
(2) overwrite if older
Default: 1
GUI Setting : None
MirrorPrompting This entry is no longer used.
MirrorQueueLimit Maximum number of mirror operations that can be queued on the source machine
Values: 1 - 65535
Default: 100
GUI Setting : Server Properties, Soruce tab, Mirror Queue, Maximum Pending Mirror Operations
MissedPackets Specifies the number of requests sent by the target that go unanswered by the source before
failover occurs
Values: 1 - 65535
Default: 5
GUI Setting : Failover Control Center, Monitor Settings, Missed Packets
Program Setting Description