EMC MirrorView Software

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EMC MirrorView Software
Gain productivity from critical information
while maximizing data availability through
advanced remote disaster recovery.
EMC MirrorView™ provides highly available data storage across a campus environment. By maintaining
synchronous data mirroring between EMC CLARiiON® FC4700 arrays, MirrorView ensures data availability
of byte-for-byte mirrored images. MirrorView is array based, so there is no impact on hosts, and it is
easily managed from within CLARiiON Navisphere® management software. MirrorView is also
integrated with EMC SnapView™ point-in-time copy software, which is available for the CLARiiON
FC4700. Together, MirrorView and SnapView provide a unique solution for online data availability
and disaster recovery.
The Big Picture
• Provides synchronous mirroring of critical data between two CLARiiON FC4700 systems
• Allows for faster disaster recovery by enabling failover to a secondary site
• Integrates with SnapView software for secondary site backup operations
• Operates on the array and is transparent to host machines and applications
• Maintains continuous data integrity during disasters via write intent and
fracture logs
• Easily managed from within EMC Navisphere software
Manage MirrorView operations from within EMC Navisphere software.
EMC MirrorView Software
The demand for data availability is
coming from every level of the organization as more and more businesses
require 24x7 information access.
Successful companies recognize that
information needs to be at the center of
their businesses, and it must be
shared, managed, and protected in
order to realize its full potential as a
competitive advantage.
MirrorView is easily set up and
managed from within EMC’s “Windowslike,” Navisphere management
software. In a MirrorView configuration, a host is attached to the primary
or production CLARiiON FC4700 array.
The host writes to the primary array,
which records the data and synchronously writes the same data to the
secondary FC4700 array. An acknowledgement is sent back to the host once
the data has been written to both the
primary and secondary arrays,
ensuring a complete transaction on
both sides of the mirror. The resulting
mirror can be used for many purposes,
most importantly, fast failover to the
secondary site so business operations
can continue.
Restore rather than recover with
faster restart from disk.
In today’s typical business environment, the ability to access an
up-to-the-second copy of production
data on another system in a different
geographic location offers incredible
protection in the event of a disaster situation. By creating a synchronous
mirror between two CLARiiON FC4700
arrays, MirrorView maintains an exact
byte-for-byte copy of your production
data in a secure, remote location. The
mirrored copy can then be used for
failover, online restore from backup, and
running backups against a SnapView
snapshot of the remote mirror.
Running on the CLARiiON FC4700
array, MirrorView operates in a highly
available environment, minimizing
exposure to internal issues and
external disaster situations, while
minimizing recovery time if a disaster
does strike. Data protection throughout the entire mirroring process is
maintained through several controls
built into MirrorView.
Fracture logs track changes in the
event that the primary array loses contact with the secondary array. Whether
the unavailability of the secondary
array was planned or unplanned, when
the secondary array returns to availability, the pending writes in the
fracture log are written to the secondary array restoring its consistent
state. A write-intent log is also kept in
the unlikely event of a primary array
failure. Upon repair of a primary array,
MirrorView will access the write-intent
log to make any changes (that were in
process between the two arrays during
the failure) to the primary data. Then, a
partial re-sync with the secondary array
can take place to return to a consistent
state between the primary and
secondary arrays. A partial re-sync minimizes the time necessary to reach a
consistent state between mirrors,
because only a partial update of the
data is needed.
Remote data replication and arraybased software.
MirrorView operates on the CLARiiON
FC4700 array. This means that it is
transparent to host machines and
their applications. MirrorView is
powered by the dual microprocessors
on the FC4700 storage processors. By
off-loading the mirroring process from
the host to the array, significant
performance increases are realized on
the host machine, freeing it to service
I/Os, not manage the data. Hostbased mirroring will stop upon a
processor failure. But because the
storage processors of the FC4700 are
redundant, MirrorView operation is
protected from a processor failure.
MirrorView allows you to easily move
data between arrays.
In conventional data migration scenarios, you typically experience a service
outage in order to gain a consistentstate copy of the data being moved.
Then, you have the time-consuming
process of copying the data to tape
media, physically transferring the tape
to the new location, and restoring the
data to the new array. MirrorView can
be used to nondisruptively migrate
MirrorView sessions are quickly and
easily managed from within EMC
Navisphere management software.
data from one CLARiiON
FC4700 array to another in a campus environment, without a service
outage. This allows simplified consolidation of remote locations and
workload reallocation when one location outgrows an application and
another site must be brought online.
MirrorView integrated with
SnapView for secondary array pointin-time copies.
EMC SnapView works with MirrorView
to create snapshots of the mirrored
data at the remote site. Both
SnapView and MirrorView are tightly
integrated and managed from within
CLARiiON Navisphere software.
MirrorView ensures that critical
Together, MirrorView and SnapView allow
production data from the priyou to manage your backups to disk and
mary site replicates
synchronously to the
tape, your application testing environment,
secondary site
and even your data warehouse refreshes
with-out error.
from a secondary location for the utmost in
data protection and parallel processing.
EMC MirrorView Software
synchronous mirroring
faster disaster recovery
easily managed from Navisphere
continuous data integrity
Take the Next Step.
Find out how EMC MirrorView can enhance and protect
your enterprise-wide information. Contact your local
EMC sales representative or EMC authorized
value-added systems integrator today.
Or call EMC directly.
www.EMC.com
where information lives
EMC Corporation
Hopkinton
Massachusetts
01748-9103
1-508-435-1000
In North America
1-800-424-3622, ext. 362
With the addition of SnapView at the
secondary site, it’s possible to take
SnapView snapshots of the mirrored
image. These resulting snapshot
images can then be backed up to
disk or tape, allowing for a backup
solution that utilizes remote tape
units and hosts that are typically
idle or experiencing minimal
usage. The fully read and writable
snapshot copy of the mirrored
data can also be mounted by a
secondary host to perform decision analysis, application testing,
and data warehouse refreshes.
Prerequisites.
• Two CLARiiON FC4700 arrays
EMC2, EMC, CLARiiON, and Navisphere are registered trademarks and MirrorView, SnapView, and where information lives
are trademarks of EMC Corporation. Other trademarks are the
property of their respective owners.
© 2000 EMC Corporation. All rights reserved.
Printed in the USA. 12/00
Produced by EMC Global Communications.
C807
Data Sheet
• EMC Navisphere 5.0 management
software
• Finisar FLX-2000-1062-040-FC extenders for greater than 500 meters
distance
• Operating system: Windows NT,
Windows 2000, and Sun Solaris 2.6, 8
Professional Services.
EMC Professional Services offers a
comprehensive set of solutions ranging
from assessments, planning, and
design through project management of
the software implementation and configuration.
Only
through
understanding the current and anticipated demands on the business
environment can the MirrorView product be implemented in a way that
ensures data security, high availability,
adaptability, flexibility, scalability, and
operational effectiveness that adds
value, not cost, to a business.