Dell EMC PowerOne combines compute, storage, and networking in a fully engineered and highly automated converged infrastructure that provides autonomous operations, all-in-one simplicity, and flexible consumption options. With PowerOne, IT organizations can start moving from traditional operations to modern cloud outcomes.
Based on vSphere clusters, PowerOne delivers business outcomes. During daily tasks such as provisioning workloads, the customer is never required to specify low-level details about IP stack configuration parameters, storage array configuration object names, and so on. Instead, the customer is asked only to identify the capacity required to support the target workload. All other information required to deliver the desired outcome is derived from system standards and best practices.
Dell EMC Symmetrix Remote Data Facility (SRDF) solutions provide near real-time copies of application data from a production storage array to one or more remote storage arrays. The main use cases are:
In a traditional SRDF device pair relationship, the secondary device (“R2”), is read only, and writes are disabled. Only the primary device (“R1”) is enabled for read and write activity. With SRDF/Metro, the R2 is also write-enabled and accessible by the host or application. The R2 takes on the personality of the R1, including the World Wide Name (WWN). A host would see both the R1 and R2 as the same device.
When SRDF/Metro is used in conjunction with VMware vSphere across various hosts in two sites, a VMware vSphere Metro Storage Cluster (vMSC) is formed. A VMware vMSC infrastructure is a stretched cluster, which is an architecture that extends local network and storage configuration across remote sites, enabling on-demand and nonintrusive workload mobility.
Another technology that can play a key role in simplifying operations in multi-site architectures is VMware Site Recovery Manager (SRM). VMware SRM provides workflow and business continuity, and disaster restart process management for VMware vSphere workloads. For the SRDF/Metro use case, we can build a vMSC; therefore, SRM is not required because the multi-site deployment is perceived by vSphere workloads as a single, stretched site. However, for the SRDF/S/A is a mainstream technology to handle failover and failback operations. In the use case documented in this white paper, VMware SRM will leverage SRDF replication to protect PowerOne Cluster Resource Groups (CRGs).
The integration of VMware SRM with SRDF automates storage-based disaster restart operations on PowerOne systems. In this paper, we focus on the availability and disaster recovery scenarios made possible by PowerOne.
Figure 1. PowerOne with SRDF basic architecture