Testing software applications that run on a database can
sometimes change or corrupt the database. To ensure that you do not lose data
while testing such applications, you can copy the data to another volume for
testing purposes, break the SnapMirror relationship and
return the destination volume to writable state, and run the test application on
it. Upon completion of the test, you can resynchronize the source and the
destination volume.
Before you begin
Ensure that
SnapMirror is enabled on the source and destination
systems.
About this task
In the following
procedure, you can use a combination of the
snapmirror break and
snapmirror resync commands to perform the
following tasks:
- Make a destination volume writable for testing.
- Restore the newly writable volume to its original state if further
testing is required.
Steps
- Create or choose a volume or
qtree to be used as a destination for the volume or qtree containing the
database. (This example uses a volume called Test_vol.)
- On the destination system, enter
the following command to make the destination writable.snapmirror break
Test_vol
For a qtree, the path must be specified as shown in the
following example. You must ensure that the qtree is quiesced before breaking
the relationship.
dst> snapmirror quiesce /vol/dst_vol/Testqtree
dst> snapmirror break /vol/dst_vol/Testqtree
- Run the application on the data
in the former destination (Test_vol).
- Check the data in the former
destination (Test_vol).
- As required, choose one of the
actions from the following table.
| If... |
Then... |
| The data has been altered in some way that is not
useful and you want to import a fresh copy of the data for further testing. |
From
the destination system, enter the following command:snapmirror resync
Test_vol
Note: For a qtree, the path must
be specified as shown in the following example:
src> snapmirror resync dst_system:/vol/dst_vol/Testqtree /vol/src_vol/Testqtree
SnapMirror makes the former destination volume into a SnapMirror destination again and updates the destination with
the latest data.
|
| The data has not been altered adversely, or you wish
to stop testing. |
The
task is completed. |
- Repeat Steps 3, 4, and 5, until
you are satisfied with the testing.
