HP StorageWorks Enterprise File Services WAN Accelerator Uživatelská příručka stáhnout pdf (Strana 22)

20 2 - INSTALLING AND USING THE RCU

IMPORTANT: To specify the HP EFS WAN Accelerator for data warming you must use the

HP EFS WAN Accelerator’s Primary IP address. If you do not use the Primary IP address, the

HP EFS WAN Accelerator cannot effectively warm the data.

In this example, the RCU client sends the files or directory in c:/data to the target

HP EFS WAN Accelerator.

Because data flows through both HP EFS WAN Accelerators, the data store on

them is warm with the file data transmitted. A warm HP EFS WAN Accelerator

has seen the data before, thus only data that has not been transferred before or has

changed, is sent across the WAN.

CIFS transparent prepopulation assures high performance for future data

transfers. You can also use it to transfer the data store before HP EFS WAN

Accelerators are deployed in their final location.

IMPORTANT: To ensure efficient transparent prepopulation, only prepopulate the HP EFS

WAN Accelerator with as much data as the disk can hold.

Monitoring Data

The RCU can monitor client directories (and their subdirectories) for changes. After a

change has been detected the RCU performs a mirror, copy, or prepopulation action.

The changes can be file updates, file or directory creation and deletion, attribute

changes, security changes, and so forth.

To run the RCU in

monitor mode

• Add the monitor mode arguments to the Run command-line. For example:

rcu /monitor /monitoridlewait 10 /monitormaxwait 300 /mirror

c:\build server1 build1

In this example, the RCU waits for any changes in the c:\build directory, or any subtree

of it. After a change is detected, the RCU waits for 10 seconds where no further

changes occur, or 300 seconds after the initial change, whichever comes first. When

the time limit is reached, the RCU mirrors the client c:\build directory tree and the

build1 directory on the server.

NOTE: The RCU cannot monitor an entire hard drive (for example: the c: drive). You can

monitor source directories on network shares. For example, the \\localserv\dir directory.

For all client actions other than mirroring, consider making the idle and maximum

wait-times long. Otherwise, you might frequently perform large data transfers. While

the deployed HP EFS WAN Accelerators significantly reduce the bandwidth required,

the data transfers place a load on the client, the HP EFS WAN Accelerators, and the

server. For detailed information, see

“/monitoridlewait” on page 29 and “/monitormaxwait” on page 29

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HP StorageWorks Enterprise File Services WAN Accelerator Uživatelská příručka Strana 22