HP StorageWorks Storage Mirroring evaluation guide (T2558-96075, February 2008)

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Changing data to cause replication

In order to test replication, you need to change the data on your source. This includes modifying existing files, creating new

files, deleting files, and changing permissions and attributes.

1. On the source, browse through the directories and files contained in your replication set.

2. Select four files from your source and record the file information specified in the following table.

3. On your source, view the contents of one of your files from the table above. Make notes here of the file contents, if

necessary.

________________________________________________________________________________________________

4. On your target, locate the four files that you have noted above from your source. They match the files on the soruce.

5. Also on your target, view the contents of the file on the source that you viewed. It matches the file on your source.

6. If your Management Console is closed, open it.

7. Highlight your source in the left pane.

8. Locate the Replication Status and Sent (Bytes) columns in the right pane.

9. Tile your Management Console so that you can see it while still having access to your desktop.

10. On your source, edit the file that you viewed above. Save your changes, and watch the Management Console statistics as

the file change causes replication to occur. .

11. Modify the other three files so that the date, time, and/or size is updated, and again watch the Management Console

statistics as the file changes cause replication to occur. While Storage Mirroring is actively replicating, the status will be

Replicating. When there is no replication activity, the status is Ready.

12. Use the horizontal scroll bars to display additional replication statistics.

 Sent (Bytes)—The total number of mirror and replication bytes that have been sent during this connection

 Queued Replication (Bytes)—The total number of replication bytes that remain in the source queue

 Sent Replication (Bytes)—The total number of replication bytes that have been sent during this connection

 Last File Touched—Identifies the last file that Storage Mirroring transmitted to the target

For complete details on all of the statistics, see the Storage Mirroring User’s Guide.

You may notice your

Replication Status toggle between Replicating and Ready as it continues processing the file changes,

when your

Replication Status stays at Ready, Storage Mirroring is waiting for additional changes to transmit. After replication

is complete, you are ready to continue with the evaluation.

File Name Attribute to Record

File 1___________________________________ Date____________________ Time ____________________

File 2___________________________________ Date____________________ Time ____________________

File 3___________________________________ File size ___________________________________________

File 4___________________________________ File size ___________________________________________

NOTE: Many user applications typically save an entire file even though only a portion of the file may have changed.

Therefore, the replication statistics will show the entire file being transmitted, not just the changed data.

To confirm that replication only transmits the changed segments of files, you must use an application, such

as a database application, or a command, such as the echo command, to save only the changed portions of

a file.