As shown in
on page 99, zDP enables you to create and manage multiple
point-in-time snapshots of volumes. A snapshot is a pointer-based, point-in-time
image of a single volume. These point-in-time copies are created using the SnapVX
feature of HYPERMAX OS. SnapVX is a space-efficient method for making volume
level snapshots of thin devices and consuming additional storage capacity only when
updates are made to the source volume. There is no need to copy each snapshot to a
target volume as SnapVX separates the capturing of a point-in-time copy from its
usage. Capturing a point-in-time copy does not require a target volume. Using a point-
in-time copy from a host requires linking the snapshot to a target volume. You can
make multiple snapshots (up to 256) of each source volume.
Figure 17 zDP operation
These snapshots share allocations to the same track image whenever possible while
ensuring they each continue to represent a unique point-in-time image of the source
volume. Despite the space efficiency achieved through shared allocation to unchanged
data, additional capacity is required to preserve the pre-update images of changed
tracks captured by each point-in-time snapshot.
zDP implementation is a two-stage process — the planning phase and the
implementation phase.
l
The planning phase is done in conjunction with your EMC representative who has
access to tools that can help size the capacity needed for zDP if you are currently
a VMAX3 user.
l
The implementation phase utilizes the following methods for z/OS:
n
A batch interface that allows you to submit jobs to define and manage zDP.
n
A zDP run-time environment that executes under SCF to create snapsets.
For details on zDP usage, refer to the
TimeFinder SnapVX and zDP Product Guide
.
For details on zDP usage in z/TPF, refer to the
TimeFinder Controls for z/TPF
Product Guide
.
Native local replication with TimeFinder
Mainframe SnapVX and zDP
99
Summary of Contents for VMAX 100K
Page 1: ...EMC VMAX3 Family Product Guide VMAX 100K VMAX 200K VMAX 400K with HYPERMAX OS REVISION 6 5 ...
Page 20: ...Preface 20 Product Guide VMAX 100K VMAX 200K VMAX 400K with HYPERMAX OS ...
Page 46: ...VMAX3 with HYPERMAX OS 46 Product Guide VMAX 100K VMAX 200K VMAX 400K with HYPERMAX OS ...
Page 72: ...Open systems features 72 Product Guide VMAX 100K VMAX 200K VMAX 400K with HYPERMAX OS ...
Page 82: ...Provisioning 82 Product Guide VMAX 100K VMAX 200K VMAX 400K with HYPERMAX OS ...
Page 158: ...Remote replication solutions 158 Product Guide VMAX 100K VMAX 200K VMAX 400K with HYPERMAX OS ...
Page 186: ...Mainframe Error Reporting 186 Product Guide VMAX 100K VMAX 200K VMAX 400K with HYPERMAX OS ...
Page 200: ...Licensing 200 Product Guide VMAX 100K VMAX 200K VMAX 400K with HYPERMAX OS ...