Rorke Data The Galaxy 65 Especificaciones descargar pdf (Pagina 101)

Galaxy Web GUI User Reference Manual

5-16 Trigger Parameters

3. Synchronization on Write-through:

If a dual-controller subsystem is optimized by write-back caching,

writes cached in separate RAID controllers will be constantly

synchronized. Each RAID controller will keep an exact replica of

its counterpart’s cached writes. If your subsystem operates in

write-through mode, you may consider turning the

synchronization function off. Doing so can save you the extra

workload on transferring cached writes between controllers.

However, in addition to cached writes, partner controllers also

synchronize configuration data. If synchronization is turned off

and the Primary controller fails afterwards, you risk losing the

previous configurations.

4. Adaptive Write Policy:

Firmware is capable of keeping track of and analyzing I/O

characteristics. Large, sequential I/Os with fewer outstandings

can be more rapidly distributed to hard drives using the write-

through mode. That is because in a dual-active controller

configuration using the write-back mode, a considerable portion

of system resources will be consumed by the act of

synchronizing cached writes between controllers.

When set to enabled, firmware will dynamically switch off the

write-back mode and disable synchronized cache when receiving

large sequential I/Os.

5.9 Trigger Parameters

This window provides options to be associated with the Event

Triggered operation. If any of the fault conditions has been selected

and the fault does occur, the Event Triggered mechanism disables

write-back caching and adopts a conservative write-back mode. All

cached writes will also be flushed to reduce the chance of system

down time.

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Rorke Data The Galaxy 65 Especificaciones Pagina 101