HP P2000 HP P2000 G3 MSA System SMU Reference Guide - Page 99

Volume properties, Snapshot properties, Viewing information about all hosts

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space in its vdisk, the system will log Warning event 444 and will automatically delete the oldest snapshot that is not a current sync point. • Delete Oldest Snapshot: Delete the oldest snapshot. • Delete Snapshots: Delete all snapshots. This is the default policy for the Critical threshold. • Halt Writes: Halt writes to all master volumes and snapshots associated with the snap pool. • Notify Only: Generates an event to notify the administrator. This is the only policy for the Warning threshold. • No Change: Take no action. NOTE: The policies Delete Oldest Snapshot and Delete Snapshots do not apply business logic to the delete decision and may delete snapshots that are mounted/presented/mapped or modified. You may set retention priorities for a snap pool as a way of suggesting that some snapshots are more important than others, but these priorities do not ensure any specific snapshot is protected. For details about setting snap-pool thresholds and policies, see the CLI reference guide. Volume properties When you select the Client Volumes component, a table shows each volume's name, serial number, size, vdisk name, and vdisk serial number. Snapshot properties When you select the Resident Snapshots component, a table shows each volume's name, serial number, and amounts of snap data, unique data, and shared data. Snap data is the total amount of data associated with the specific snapshot (data copied from a source volume to a snapshot and data written directly to a snapshot). Unique data is the amount of data that has been written to the snapshot since the last snapshot was taken. If the snapshot has not been written or is deleted, this value is zero bytes. Shared data is the amount of data that is potentially shared with other snapshots and the associated amount of space that will be freed if the snapshot is deleted. This represents the amount of data written directly to the snapshot. It also includes data copied from the source volume to the storage area for the oldest snapshot, since that snapshot does not share data with any other snapshot. For a snapshot that is not the oldest, if the modified data is deleted or if it had never been written to, this value is zero bytes. Viewing information about all hosts In the Configuration View panel, right-click Hosts and select View > Overview. The Hosts table shows the quantity of hosts configured in the system. For each host, the Hosts Overview table shows the following details: • Host ID. WWPN or IQN. • Name. User-defined nickname for the host. • Discovered. If the host was discovered and its entry was automatically created, Yes. If the host entry was manually created, No. • Mapped. If volumes are mapped to the host, Yes; otherwise, No. • Host Type. FC or iSCSI. • Profile. • Standard: LUN 0 can be assigned to a mapping. • HP-UX: LUN 0 can be assigned to a mapping and the host uses Flat Space Addressing. • OpenVMS: LUN 0 cannot be assigned to a mapping. HP P2000 G3 MSA System SMU Reference Guide 99

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HP P2000 G3 MSA System SMU Reference Guide
99
space in its vdisk, the system will log Warning event 444 and will automatically delete the oldest
snapshot that is not a current sync point.
•
Delete Oldest Snapshot: Delete the oldest snapshot.
•
Delete Snapshots: Delete all snapshots. This is the default policy for the Critical threshold.
•
Halt Writes: Halt writes to all master volumes and snapshots associated with the snap pool.
•
Notify Only: Generates an event to notify the administrator. This is the only policy for the Warning
threshold.
•
No Change: Take no action.
NOTE:
The policies Delete Oldest Snapshot and Delete Snapshots do not apply business logic to the
delete decision and may delete snapshots that are mounted/presented/mapped or modified. You may set
retention priorities for a snap pool as a way of suggesting that some snapshots are more important than
others, but these priorities do not ensure any specific snapshot is protected.
For details about setting snap-pool thresholds and policies, see the CLI reference guide.
Volume properties
When you select the Client Volumes component, a table shows each volume’s name, serial number, size,
vdisk name, and vdisk serial number.
Snapshot properties
When you select the Resident Snapshots component, a table shows each volume’s name, serial number,
and amounts of snap data, unique data, and shared data.
Snap data is the total amount of data associated with the specific snapshot (data copied from a source
volume to a snapshot and data written directly to a snapshot).
Unique data is the amount of data that has been written to the snapshot since the last snapshot was taken.
If the snapshot has not been written or is deleted, this value is zero bytes.
Shared data is the amount of data that is potentially shared with other snapshots and the associated
amount of space that will be freed if the snapshot is deleted. This represents the amount of data written
directly to the snapshot. It also includes data copied from the source volume to the storage area for the
oldest snapshot, since that snapshot does not share data with any other snapshot. For a snapshot that is
not the oldest, if the modified data is deleted or if it had never been written to, this value is zero bytes.
Viewing information about all hosts
In the Configuration View panel, right-click
Hosts
and select
View > Overview
. The Hosts table shows the
quantity of hosts configured in the system.
For each host, the Hosts Overview table shows the following details:
•
Host ID. WWPN or IQN.
•
Name. User-defined nickname for the host.
•
Discovered. If the host was discovered and its entry was automatically created, Yes. If the host entry
was manually created, No.
•
Mapped. If volumes are mapped to the host, Yes; otherwise, No.
•
Host Type. FC or iSCSI.
•
Profile.
•
Standard: LUN 0 can be assigned to a mapping.
•
HP-UX: LUN 0 can be assigned to a mapping and the host uses Flat Space Addressing.
•
OpenVMS: LUN 0 cannot be assigned to a mapping.