HP StorageWorks B-Series Remote Replication Solution Best Practices Guide (5697-6731, June 2007)

NOTE:
LSANs are set up the same way as other zones with the exception that the zone nam e
starts with “LSAN_”.
NOTE:
The Share Devices wizard i n Fabric M anager simplifies the process of setting up LSANs.
See HP StorageWorks Fabric Manager, page 50 for details.
8. The p orts need t
o be enabled to see the LSANs. From the router, launch Web Tools and select the
port to launch the Por t Administration window:
a. SelecttheportandclickPersistent Enable.
b. Close the Port
Administrations window.
9. Click the FCR but ton on the Switch View to bring up the FCR module.
Use the tabs to view the EX-Ports, LSAN Fabrics, LSAN Zones and LSAN Devices and make sure that
the configu ra
tion succeeded.
HP StorageWorks Continuous Access configuration procedure
HP StorageWorks Continuous Access EVA software is an array-based application that utilizes a powerful
simple graphical user interface to create, manage and c on figure remote replication on the entire EVA
product family. Continuous Access EVA shares an integrated m anag ement i nterface, called Replication
Solutions Manager™ (RSM), with HP StorageWor ks Business Copy™ offering a unique, unified
replication management approach.
Refer to online Continuous Access EVA reference manuals for detailed planning and configuration
information at h
ttp://www.hp.com/go /caeva .
The following includes some of the array-specific factors to be aware of while configuring the Continuous
Access replication solution:
Disk grou
p
When data
is synchronously replicated remotely, application performance is not necessarily improved
by increasing the number of disks in a disk group. This is because response time for application writes
includes the time for replication. In a ddition, sequential access (read or write) is limited by the per-disk
performance rather tha n the number of disks in the disk group. Additional disks improve response time
only when an application h as a high percentage of random reads compared to writes.
Analyze the I/O profile of your applications and consider the following:
• If the a
pplication I/O stream is dominated by a mix of simultaneous sequential and random
transfers, determine how these streams can be directed to specificvirtualdisks.
• Put virtual disks with similar tasks in the same disk group. In general, separate sequential I/O
stream data (database logs, rich content) from random I/O streams (database information store,
file sha res).
Trans
fer profiles that differ over time are not a concern. A virtual disk that receives sequential transfers for
part of the day and random accesses for the rest of the day will operate well in both cases. The issue to
consider is accommodating simultaneous sequential and random streams.
DR groups
A data replication (DR) group is a logical group of virtual disks in a remote replication relationship with a
corresponding group on another array. Hosts write data to the virtual disks in the source DR group, and
B-Series remote replication solution
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