Figure 5-1 Synchronous and asynchronous command processing
The processing difference between these two command types are described
Synchronous command processing on page 5-3
command processing on page 5-3
Synchronous command processing
In addition to the replication commands, the process is executed by
synchronizing with a command execution, and then returning a response
after the processing is completed. When an error occurs, the error is returned
to CCI at each occurrence.
Asynchronous command processing
When an asynchronous command is executed, the command is received at
the storage system, and a response is returned before the processing is
executed. The actual processing is executed asynchronously with command
input.
The completion of the asynchronous command processing can be checked
with the
raidcom get command_status
command. When you execute the
raidcom get command_status
command after executing an asynchronous
command, the
raidcom get command_status
command is terminated after
all asynchronous command processing has been completed.
Errors during asynchronous command processing
When an error occurs during asynchronous command processing, the error
information, such as the total number of errors or error code (SSB1 and
SSB2), is provided. After executing the asynchronous command, execute the
raidcom get command_status
command to check the error information if the
asynchronous command processing completed normally.
Error codes SSB1 and SSB2 are stored only at the first error occurrence. For
the second and subsequent occurrences, only the number of the error
occurrence is stored with no error code. Therefore, before executing an
Provisioning operations with CCI
5-3
Command Control Interface User and Reference Guide
Summary of Contents for HUS VM
Page 10: ...x Command Control Interface User and Reference Guide ...
Page 18: ...xviii Preface Command Control Interface User and Reference Guide ...
Page 78: ...2 50 CCI software environment Command Control Interface User and Reference Guide ...
Page 154: ...4 8 Starting up CCI Command Control Interface User and Reference Guide ...
Page 191: ...Provisioning operations with CCI 5 37 Command Control Interface User and Reference Guide ...
Page 280: ...6 56 Data replication operations with CCI Command Control Interface User and Reference Guide ...
Page 286: ...6 62 Data replication operations with CCI Command Control Interface User and Reference Guide ...
Page 302: ...7 16 Data protection operations with CCI Command Control Interface User and Reference Guide ...
Page 324: ...8 22 Examples of using CCI commands Command Control Interface User and Reference Guide ...
Page 524: ...9 200 Troubleshooting Command Control Interface User and Reference Guide ...
Page 529: ...Command Control Interface User and Reference Guide ...