Host-based automation is provided for normal, transient fault, and planned or
unplanned failover operations.
EMC Solutions Enabler Symmetrix SRDF CLI Guide provides detailed descriptions and
implementation guidelines.
In cascaded and concurrent configurations, a restart from the asynchronous site may
require a wait for any remaining data to arrive from the synchronous site. Restarts
from the synchronous site requires no wait unless the asynchronous site is more
recent (the latest updates need to be brought to the synchronous site).
Concurrent SRDF/Star
In concurrent SRDF/Star solutions, production data on R11 devices replicates to two
R2 devices in two remote arrays.
In the following image:
l
Site B is a secondary site using SRDF/S links from Site A.
l
Site C is a tertiary site using SRDF/A links from Site A.
l
The (normally inactive) recovery links are SRDF/A between Site C and Site B.
Figure 20 Concurrent SRDF/Star
R11
R2
R2
SRDF/S
SRDF/A
SRDF/A
recovery links
Site B
Active
Inactive
Site A
Site C
Concurrent SRDF/Star with R22 devices
SRDF supports concurrent SRDF/Star topologies using concurrent R22 devices. R22
devices have two SRDF mirrors, only one of which is active on the SRDF links at a
given time. R22 devices improve the resiliency of the SRDF/Star application, and
reduce the number of steps for failover procedures.
The following image shows R22 devices at Site C.
Remote replication solutions
110
Product Guide
VMAX 100K, VMAX 200K, VMAX 400K with HYPERMAX OS
Содержание VMAX 100K
Страница 1: ...EMC VMAX3 Family Product Guide VMAX 100K VMAX 200K VMAX 400K with HYPERMAX OS REVISION 6 5 ...
Страница 20: ...Preface 20 Product Guide VMAX 100K VMAX 200K VMAX 400K with HYPERMAX OS ...
Страница 46: ...VMAX3 with HYPERMAX OS 46 Product Guide VMAX 100K VMAX 200K VMAX 400K with HYPERMAX OS ...
Страница 72: ...Open systems features 72 Product Guide VMAX 100K VMAX 200K VMAX 400K with HYPERMAX OS ...
Страница 82: ...Provisioning 82 Product Guide VMAX 100K VMAX 200K VMAX 400K with HYPERMAX OS ...
Страница 100: ...Native local replication with TimeFinder 100 Product Guide VMAX 100K VMAX 200K VMAX 400K with HYPERMAX OS ...
Страница 158: ...Remote replication solutions 158 Product Guide VMAX 100K VMAX 200K VMAX 400K with HYPERMAX OS ...
Страница 186: ...Mainframe Error Reporting 186 Product Guide VMAX 100K VMAX 200K VMAX 400K with HYPERMAX OS ...
Страница 200: ...Licensing 200 Product Guide VMAX 100K VMAX 200K VMAX 400K with HYPERMAX OS ...