IBM DS6000 Series ユーザーズマニュアル

DS6000 Series: Concepts and Architecture

In this case, the copy created by Consistency Group operation reflects only the 1st and 3rd 
write operation, not including the 2nd operation. 

If you accept this result, you can use Consistency Group operation with your applications. 
But, if you cannot accept it, you should consider other procedures without Consistency Group 
operations. For example, you could stop your applications for a slight interval for the backup 
operations.

There are multiple interfaces for invoking Copy Services. We describe them in this section.

Copy Service functions can be initiated over the following interfaces:

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zSeries Host I/O Interface

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DS Storage Manager Web-based Interface

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DS Command-Line Interface (DS CLI)

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DS open application programming interface (DS Open API)

DS Storage Manager, DS CLI, and DS Open API commands are issued via the Ethernet 
network, and these commands are invoked by the DS Management Console (MC). When the 
MC has the command requests, including those for Copy Services, from these interfaces, the 

1st

2nd

3rd

independent
for each write 
operation

Servers

Completed

Wait

LSS11

LSS12

LSS13

This write operation is  
completed because 
LSS11 is not in an 
extended long busy 
condition.

This write operation is  
not completed 
because LSS12 is in 
an extended long 
busy  condition.

Completed

This write operation is  
completed because LSS13 
is not in an extended long 
busy condition.
(I/O sequence is not kept.)