Administrator Guide

VMware vSphere and Live Volume
68 Dell EMC SC Series: Synchronous Replication and Live Volume | CML1064
• VMware vSphere 5.5 or newer
• SC Series best practices with VMware vSphere followed and configured
• Uniform or non-uniform storage presentation of volumes to vSphere hosts
• Fixed or Round Robin path selection policy (PSP)
• Live Volume with automatic failover with VMFS datastores or virtual mode raw device mappings
(RDMs), with support for physical mode RDMs (added with SCOS 7.1)
• Live Volumes enabled to fail over automatically
• Fibre Channel or iSCSI synchronous high availability replication between SC Series arrays
• Maximum supported latency for synchronous high availability replication of 10 ms RTT
• Maximum supported latency of vSphere management network of 10 ms RTT
• Maximum supported latency from array to tiebreaker of 200 ms RTT
• Redundant vMotion network supporting a minimum throughput of 250 Mbps
8.16 VMware and Live Volume managed replication
Live Volume fulfills the needs of high availability use cases between two SC Series arrays in a local or
stretched configuration. A third array can be added to the design to host a Live Volume managed replication.
A managed replication is a replica of the primary Live Volume and may be either synchronous or
asynchronous, depending on the type of replication used between the Live Volume pair. When Live Volume is
configured to provide high availability intra site, the managed replication provides an additional level of data
protection and recovery in the event of an unplanned outage impacting both Live Volume arrays. Live Volume
managed replication and automatic failover are supported together. If an automatic failover occurs, the
managed replication will follow the primary Live Volume which was automatically failed over.
Synchronous Live Volume with asynchronous Live Volume managed replication
Although managed replications are controlled by Live Volume, they fundamentally work the same way as
standard synchronous or asynchronous volume replication. This includes the recovery options available with
view volumes and DR activation.
Asynchronous Live Volume with synchronous Live Volume managed replication