The following figure shows the configuration when a global-active device is used. Also, the following table shows whether performance data can be collected for each resource within the figure.
|
I/O type |
Resources |
Can/cannot collect performance data |
Values that can be collected |
Resource location |
Configuration figure number |
|---|---|---|---|---|---|
|
I/O from the host |
Target port |
Y |
Displays the I/O from the host for both read and write. |
Primary site/Secondary site |
1 |
|
Logical Device |
Y |
Displays only the I/O from the host for read, and displays the sum of I/O from the host and from the remote site for write. |
Primary site/Secondary site |
2 |
|
|
I/O to the remote site |
Initiator port |
Y |
Not only the I/O of the copy pair for a global-active device but the performance value of the entire LU connected to the port. |
Primary site/Secondary site |
3 |
|
RCU Target port |
Y |
In addition to the I/O of the copy pair for a global-active device, this is a performance value of the entire LU that is connected to the port. |
Primary site/Secondary site |
4 |
|
|
Logical Device |
Y |
Displays only the I/O from the host for read, and displays the sum of I/O from the host and from the remote site for write. |
Primary site/Secondary site |
5 |
|
|
I/O to the quorum disk |
Logical device (Quorum disk) |
N |
Performance values cannot be collected because this is an external volume. |
Primary site/Secondary site |
6 |
|
External port |
Y |
In addition to the I/O of the copy pair for a global-active device, this is a performance value of the entire LU that is connected to the port. |
Primary site/Secondary site |
7 |
|
|
Target port |
Y |
In addition to the I/O of the copy pair for a global-active device, this is a performance value of the entire LU that is connected to the port. |
External storage system for a quorum disk |
8 |
|
|
Logical device (Quorum disk) |
Y |
Displays the I/O from the Quorum disk for both read and write. |
External storage system for a quorum disk |
9 |
|
|
Legend: Y: Can be collected N: Cannot be collected (the value will be indefinite) |
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