Cisco Cisco MDS 9000 SANTap 데이터 시트
Data Sheet
© 2009 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
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EMC RecoverPoint CLR provides simultaneous block-level local replication and synchronous or asynchronous
block-level remote replication for LUNs, with one copy residing locally in the same SAN with every write operation
journaled, and the second copy resides remotely in a different SAN with significant groups of write operations
journaled. Recovery of one copy can occur without affecting the other copy.
EMC RecoverPoint CDP and CRR both provide bi-directional replication and any-point-in-time recovery capability,
which allows the target LUNs to be rolled back to a previous point in time and used for read and write operations
without affecting ongoing replication or data protection.
EMC RecoverPoint provides efficient, asynchronous data replication over IP. As of EMC RecoverPoint 3.2,
synchronous CRR over Fibre Channel is also supported. When Fibre Channel is selected for CRR, all the EMC
RecoverPoint appliances will automatically discover and configure their existing Fibre Channel ports on host bus
adapters (HBAs) for remote replication.
Cisco MDS 9000 SANTap sends a copy of each write I/O operation to the back-end storage device and sends
another copy to the appliance. The EMC RecoverPoint appliance can then use the I/O locally for CDP and journaling
or transport it over the WAN link to a remote site (Figure 2).
Figure 2. SANTap Operating Procedure
A service node is a dedicated virtualization ASIC in the switch or line card that hosts the Cisco MDS 9000 SANTap
application. The service node taps a copy of the primary write I/Os and sends it to the EMC RecoverPoint appliance.
Upon receipt, the local EMC RecoverPoint appliance sends the write I/Os to a peering remote appliance and
maintains a journal of all replication operations.
Use the Cisco MDS 9000 18/4-Port Multiservice Module for a SAN service core design, or the Cisco MDS 9222i
Multiservice Modular Switch for a SAN service edge design.
Unlike in data-path appliances, Cisco MDS 9000 SANTap out-of-band fabric splitting provides a reliable copy of the
write I/O operations to the appliance, preserving I/O integrity and availability (i.e. appliance errors do not affect the
host I/O), without affecting application performance.