Best Practices; Scheduled Remote Copy Planning Checklist - HP StorageWorks P4000 User Manual
Remote copy user guide
Hide thumbs
Also See for StorageWorks P4000:
- User manual (350 pages) ,
- Maintenance manual (53 pages) ,
- Release notes (18 pages)
Table of Contents
Scheduled remote snapshot retention policy
n of days for primary snapshots x of days for remote
snapshots
n of weeks for primary snapshots x of weeks for re-
mote snapshots
A remote snapshot is deleted only after its corresponding primary snapshot is deleted.
Additionally, a remote snapshot is deleted only after its counterpart primary snapshot. You cannot
retain fewer remote snapshots than primary snapshots when setting your retention policies.
NOTE:
Over the course of time, through deletion of primary snapshots, if you accumulate more remote
snapshots than primary snapshots, the remote snapshots become regular snapshots when their
corresponding primary snapshots are deleted. You can identify them as remote snapshots by their
names, since the naming convention is established as part of creating the remote snapshot schedule.
Best practices
Retain at least two primary snapshots to ensure that only incremental copying is required for remote
snapshots.
Review your remote copy schedule to ensure that the frequency of the remote copies correlates to
the amount of time required to complete a copy.
Use the checklist in
Table 4 Scheduled Remote Copy planning checklist
Configuration category
Scheduled snapshot
Start time
Recurrence
Primary setup
Retention
Remote setup
Management group
Volume
Table 4
on page 15 to help plan scheduled remote snapshots.
Characteristic
Start date (mm/dd/yyyy) for the schedule to begin
Start time (mm:hh:ss) for the schedule to begin
Recurrence is a yes or no choice. Do you want to take a remote snapshot
one time in the future and not have it recur, or do you want a remote snapshot
to be taken on a regular schedule?
Frequency (minutes, hours, days, or weeks) determines the interval between
recurring, scheduled, remote snapshots.
Select one of the following options:
Maximum number of snapshots (#)
Set period of time (minutes, hours, days, or weeks)
The management group that contains the remote snapshot
The remote volume for the remote snapshots
Maximum number of snapshots retained
n + 2 primary snapshots older than nx + 2 remote
snapshots older than x
n + 2 primary snapshots older than nx + 2 remote
snapshots older than x
P4000 Remote Copy user guide
15
Table of Contents
