EMC FC4700 MirrorView Features and Benefits

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EMC Fibre Channel Storage System Model FC4700 Configuration Planning Guide
About MirrorView Remote Mirroring Software
MirrorView Features and Benefits
MirrorView mirroring adds value to customer systems by offering
the following features:
•Provision for disaster recovery with minimal overhead
•Local high availability
•Cross mirroring
•Integration with EMC SnapView LUN snapshot copy software
Provision for Disaster Recovery with Minimal Overhead
Provision for disaster recovery is the major benefit of MirrorView
mirroring. Destruction of the primary data site would cripple or ruin
many organizations. MirrorView lets data processing operations
resume within a working day.
MirrorView is transparent to servers and their applications. Server
applications do not know that a LUN is mirrored, and the effect on
performance is minimal.
MirrorView uses synchronous writes, which means that server writes
are acknowledged only after all secondary storage systems commit
the data. This type of mirroring is in use by most disaster recovery
systems sold today.
MirrorView is not server-based, therefore it uses no server I/O or
CPU resources. The mirror processing is performed on the storage
system.
Local High Availability
MirrorView operates in a highly available environment. There are
two host bus adapters (HBAs) per host, and there are two SPs per
storage system. If a single adapter or SP fails, the path in the
surviving SP can take control of (trespass) any LUNs owned by the
failed adapter or SP. The high availability features of RAID protect
against disk failure. Mirrors are resilient to an SP failure in the
primary or secondary storage system.
Cross Mirroring The primary or secondary role applies to just one remote mirror. A
storage system can maintain a primary image with one mirror and a
secondary image with another mirror. This allows the use of server