VMware VC-SRM4-A - vCenter Site Recovery Manager Manual de usuario descargar pdf (Pagina 7)

Improving VMware Disaster Recovery with EMC RecoverPoint

Figure 3. Host-based write splitting

Figure 3 shows that six of the nine virtual machines have a Windows-based write

splitter installed. For those virtual machines, the Windows-based write splitter

captures writes to each SAN volume that is attached to each guest virtual machine in

physical RDM/P mode and sends a copy of those writes to the RecoverPoint

appliance. These six virtual machines can have their data replicated by RecoverPoint;

the other three virtual machines cannot have their data replicated by RecoverPoint.

Intelligent fabric write splitting

RecoverPoint write splitting is also provided through intelligent fabric APIs provided

on EMC Connectrix switches using Brocade and Cisco technology. RecoverPoint

supports the Brocade Storage Application Services APIs on the Connectrix AP-7600B

switch. RecoverPoint also supports the Cisco SANTap APIs provided on the

Connectrix Storage Services Module and the MDS 18/4 Multi-Services Blade, either of

which can be installed in a Connectrix MDS-9000 director family, or in the Connectrix

MDS-9222i switch. For replication, VMFS 3 and VMFS 5 volumes as well as volumes

attached to the virtual machine in RDM/P are supported.

When a write is issued by a virtual machine it is actually handled by the hosting ESX

server, which will send the write to an RDM/P volume or to a VMFS volume. The

intelligent switch will identify the write target as one of the volumes that RecoverPoint

is replicating and will send a copy of the write to the RecoverPoint appliance. This is

an out-of-band, split-path implementation that ensures the original write is sent on to

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VMware VC-SRM4-A - vCenter Site Recovery Manager Manual de usuario Pagina 7