Incoming copy queue

Use this page to view the virtual volume incoming copy queue for a IBM® TS7700 cluster.

The incoming copy queue represents the amount of data waiting to be copied to a cluster. Data written to a cluster in one location can be copied to other clusters in a grid to achieve uninterrupted data access. You can specify which clusters (if any) copies reside on, and how quickly copy operations occur. Each cluster maintains its own list of copies to acquire, then satisfies that list by requesting copies from other clusters in the grid according to queue priority.

Table 1. Copy queue table values and their descriptions
Column Name Description
Copy Type The type of copy that resides in queue. Possible values are:
Immediate
Volumes can reside in this queue if they are assigned to a management class that uses the Rewind Unload (RUN) copy mode.
Synchronous-deferred
Volumes can reside in this queue if they are assigned to a management class that uses the Synchronous Copy mode and some event (such as the secondary cluster going offline) prevented the secondary copy from occurring.
Immediate-deferred
Volumes can reside in this queue if they are assigned to a management class that uses the RUN copy mode and some event (such as the secondary cluster going offline) prevented the immediate copy from occurring.
Deferred
Volumes can reside in this queue if they are assigned to a management class that uses the Deferred copy mode.
Time Delayed
Volumes can reside in this queue if they are eligible to be copied based on either their creation time or last write time.
Copy-refresh
Volumes can reside in this queue if the management class assigned to the volumes has changed and a LIB REQ command was issued from the host to initiate a copy.
Family-deferred
Volumes can reside in this queue if they are assigned to a management class that uses RUN or Deferred copy mode and cluster families are being used.
Quantity The total number of copies in queue for each type.
Last TVC Cluster
Note: This column is only shown when View by Last TVC is selected.
The name of the cluster where the copy last resided in tape volume cache (TVC). Although this may not be the cluster from which the copy is received, the majority of copies are typically obtained from the TVC cluster.

If the Unassigned TVC column is displayed, copies shown in that column exist but are not yet assigned to a cluster. Once a cluster is selected to receive the copy, the copy is displayed under that cluster.

Size Total size of the queue, displayed in GiB.
Note: Refer to the topic Data storage values in the Related Information section for additional information concerning the use of binary prefixes.
When Copy Type is selected this value is per copy type. When View by Last TVC is selected this value is per cluster.

You can change the appearance of the Copy Queue table.
Table 2. Actions available from the Copy Queue table
To... Do this:
Change the organization of the table Select View by Queue Type to organize the data primarily by queue type.
Select View by Last TVC Cluster to organize the data primarily by cluster name.
Download a CSV file of all queue data on the table Select Actions > Download. If no volumes exist in queue the text of the file will state, "No volumes exist in the queue."
Note: Excel removes leading zeros from downloaded .csv files. To preserve leading zeros in files your download, refer to Preserving leading zeros in downloaded data.
View information about any copy throttling in progress Hover over the Throttling inbound icon if displayed in the table header.