CLI Guide

Table 8. ds summary field descriptions (continued)
Field Description
Capacity Summary
Number of devices with free capacity, amount of free
capacity for the cluster, and total capacity for all clusters.
Distributed volumes (in consistency groups) unhealthy summary:
CG Name
Name of the consistency group of which the unhealthy device
is a member.
Cache Mode
Cache mode of the consistency group. Synchronous -
Supported on metro node Local and metro node Metro
configurations where clusters are separated by up to 5 ms of
latency. In synchronous cache mode, writes to the back-end
storage volumes are not acknowledged to the host until the
back-end storage volumes acknowledge the write.
Number of unhealthy volumes
Number of unhealthy volumes in the consistency group.
Cluster
Visibility of the consistency group.
● cluster-1 - consistency group is visible only at
cluster-1.
● cluster-2- consistency group is visible only at cluster-2.
● cluster-1, cluster-2 - consistency group is visible
at both clusters.
Operational Status
Current status for this consistency group with respect to each
cluster on which it is visible.
● ok - I/O can be serviced on the volumes in the
consistency group.
● suspended - I/O is suspended for the volumes in the
consistency group. The reasons are described in the
operational status: details.
● degraded - I/O is continuing, but there are
other problems described in operational status:
details.
●
unknown - The status is unknown, likely because of lost
management connectivity.
Status Details
If operational status is ok this field is empty: “[ ]”.
Otherwise, it displays additional information, which may be any
of the following:
● requires-resolve-conflicting-detach - After
the inter-cluster link is restored, two clusters have
discovered that they have detached one another and
resumed I/O independently. The clusters are continuing to
service I/O on their independent versions of the data. The
consistency-group resolve-conflicting-detach command
must be used to make the view of data consistent again
at the clusters.
● rebuilding-across-clusters - One or more
distributed member volumes is being rebuilt. At least one
volume in the group is out of date at that cluster and is
re-syncing. If the link goes out at this time the entire group
is suspended. Use the rebuild status command to
display which volume is out of date at which cluster.
● rebuilding-within-cluster - One or more local
rebuilds is in progress at this cluster.
● data-safe-failure - A single director has failed.
The volumes are still crash-consistent, and will remain
so, unless a second failure occurs before the first is
recovered.
164 Commands