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HP Storage Mirroring Software User Manual

Page 46

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6 - 3

Use checksum comparison to send minimal blocks of data—For those files flagged

as different, the mirror performs a checksum comparison and only sends those blocks

that are different.

Remirror on Auto-Reconnect—In certain circumstances, for example if the disk-based

queues on the source are exhausted, Storage Mirroring will automatically disconnect

connections (called auto-disconnect) and then automatically reconnect them (called

auto-reconnect). In order to ensure data integrity on the target, Storage Mirroring will perform

an automatic mirror (called an auto-remirror) after an auto-reconnect. If you enable this

option, specify the type of auto-remirror that will be performed.

Differences with Checksum—Any file that is different on the source and target based

on date, time, and/or size is flagged as different. The mirror then performs a checksum

comparison on the flagged files and only sends those blocks that are different.

Differences with no Checksum—Any file that is different on the source and target

based on date, time, and/or size is sent to the target.

Full—All files are sent to the target.

Calculate Replication Set size on connection—Determines the size of the replication set

prior to starting the mirror. The mirroring status will update the percentage complete if the

replication set size is calculated.

4.

Click Connect to establish the connection.

NOTE:

See the table

File Differences Mirror Options Compared

on page 10-2 for a

comparison of how the file difference mirror settings work together, as well as how

they work with the global checksum setting on the Source tab of the Server

Properties.

NOTE:

Database applications may update files without changing the date, time, or file

size. Therefore, if you are using database applications, you should use the File

Differences with checksum or Full option.

This manual is related to the following products: