beautypg.com

HP Storage Mirroring Software User Manual

Page 75

background image

12 - 3

4.

When you schedule transmission start criteria, transmission will start when the criteria is met

and will continue until the queue is empty or a transmission stop criteria is met. Select the

Start

option in the

Limit Type box.

Define the start options for Storage Mirroring transmission by using any combination of the

following options.

Transmission session start—This option establishes a date and time of the day to begin

transmitting data. For example, you may want to specify a transmission time that corresponds

to a low bandwidth usage time. Once started, Storage Mirroring will continue to transmit data

until the queue is empty or until another limitation stops the transmission. Specify a

Date and

Time to start transmitting data. The down arrow next to the date field displays a calendar

allowing easy selection of any date. The time field is formatted for any AM or PM time.

Session Interval—This option begins transmitting Storage Mirroring data at specified

intervals of time. This option is used in conjunction with

Transmission session start. For

example, if the

Session Interval is set to repeat transmission every 30 minutes and the

Transmission session start is set to begin transmitting at 10 p.m., if the queue is emptied

at 10:20 the transmission will stop. The start criteria is again met at 10:30 and Storage

Mirroring will begin transmitting any new data in the queue. Specify an interval for additional

transmissions by indicating a length of time and choosing minutes, hours, or days.

Queue Threshold (percentage) and Queue threshold (bytes)—If the allocated amount

of queue disk space is in use, Storage Mirroring cannot continue to queue data causing an

auto-disconnect and the potential for loss of data. To avoid using the entire queue, you can

configure Storage Mirroring to begin transmitting data to the target when the queue reaches

a certain point. This point can be defined as a percentage of the disk queue that must be in

use or the number of bytes in the disk queue. For example, if you specify 40%, when 40% of

the queue is in use, Storage Mirroring initiates the transmission process and sends the data

in the queue to the target machine. The transmission stops when the queue is empty or a

Storage Mirroring stop transmission criteria is met. Or you might set a queue threshold of 500

MB. Storage Mirroring will wait until there is 500 MB of data in the queue and then begin

transmitting the data. Like other start criteria, Storage Mirroring continues transmitting until

the queue is empty or a Storage Mirroring stop criteria is met. Specify a percentage of the disk

queue and system memory that must be in use to initiate the transmission process, and/or

specify the number of bytes that must be in the source queue and system memory to initiate

the transmission process.

NOTE:

A

Transmission Session Start setting will override any other start criteria. For

example, if you set the

Transmission Session Start and the Queue

Threshold, transmission will not start until you reach the indicated start time.

This manual is related to the following products: