Viewing Volume Details

You can retrieve and view volume information using MCS and the CLI.

Viewing Volume Details in the MapR Control System

Log in to MCS and go to the Summary tab in the volume information page for the volume.
You can view the following in the Detail pane:
Table 1. SETTINGS AND AUDITING
Created By Indicates the user who created the volume.
Volume Type Indicates the type of volume. Value can be one of the following:
  • Standard
  • Mirror
Volume Name Indicates the name of the volume.
Accountable Entity Indicates the name of the accountable entity.
Volume Access Indicates the type of access allowed on the volume. Value can be one of the following:
  • Read/Write
  • Read-only
Mounted Indicates whether or not volume is mounted.
Mount Path Indicates the mount path of the volume.
Data on Wire Encryption Indicates whether (Yes) or not (No) on-wire encryption is enabled for the volume.
Data at Rest Encryption Indicates whether (Yes) or not (No) data-at-rest encryption (DARE) is enabled for the volume.
Topology Indicates the rack path to the volume.
Partially out of Topology Indicates whether containers associated with the volume are outside the volume's main topology.
Last accessed Indicates the date when the volume was last accessed.
Enable Auditing Indicates whether auditing is enabled at the volume level.
Coalesce Interval Indicates the interval of time (in minutes) used for logging multiple READ, WRITE, or GETATTR operations on one file from one client IP address, if auditing is enabled.
Table 2. REPLICATION (HOT)
Replication Indicates the minimum (Min Target) and desired (Max Target) number of copies for the volume data.
Name Container Replication Indicates the minimum (Min Target) and desired (Max Target) number of copies for the name container.
Optimize Replication Indicates the basis for replication. Value can be one of the following:
  • High throughput, or cascading replication
  • Low latency, or star replication
Guarantee Min Replication Indicates whether or not to enforce minimum number of copies.
Note: The following is visible only if warm tiering is enabled for the volume.
Table 3. ERASURE CODING (WARM)
Topology Indicates the topology of the erasure-coded volume.
Remote Target Indicates the name of the tier.
Storage Policy Name Indicates the name of the storage policy.
Policy Detail Indicates the rules in the policy for offloading data.
Retention Duration after Recall Indicates the period of time to keep recalled data in the hot tier.
Erasure Coding Scheme Indicates the number of data and parity chunks.
Tier Purged Indicates the amount of offloaded data.
Note: The following is visible only if cold tiering is enabled for the volume.
Table 4. REMOTE ARCHIVING (COLD)
Remote Target Indicates the name of the remote storage.
Storage Policy Name Indicates the name of the storage policy.
Policy Detail Indicates the rules in the policy for offloading data.
Retention Duration after Recall Indicates the number of days to keep recalled data in the MapR cluster (hot tier).
Tier Purged Indicates the amount of offloaded data.
ADMINISTRATIVE CONTROLS Indicates the users and/or groups who:
  • Have admin access and/or full control on the volume.
  • Can perform one or more administrative operations such as create a dump file and backup the volume, restore and mirror the volume, edit the volume properties, and delete the volume.
USER ACCESS CONTROLS Indicates the type of users — public, user, group, and/or role — that have and do not have access to volume data.
Quota Indicates the amount of (advisory and hard) disk space allocated to the volume.
Graph The graphs show:
  • DISKUSAGE: The total amount of disk space allocated for the volume and the amount of disk space used by the volume and associated snapshots.
  • CLUSTER DISKSPACE: The total amount of disk space on the cluster, the amount of disk space allocated and utilized by the volumes in the cluster, and the reserve limit.
Snapshot Schedule Indicates the schedule for automatically creating a snapshot of the volume for the purpose of preserving the state of the volume.
Mirror Schedule (Available only for mirror volumes) Indicates the schedule for automatically copying data (that has changed at the file-block level since the last data transfer) directly from the source volume to the mirror volume.
Offload Schedule Indicates the schedule for automatically offloading data to the tier.

Viewing Volume Information Using the CLI or the REST API

The basic command to retrieve volume information is:

maprcli volume info (-name <volume_name> | -path <volume_path>)

You must specify either name or path, but not both. For complete reference for this command, see volume info.