EMC VNX REPLICATION TECHNOLOGIES - Corporate ?· EMC VNX REPLICATION TECHNOLOGIES . ... VNX Unified, and VNX Gateway. EMC ... Figure 1 –Supported Replication Technologies with VNX Systems VNX Unified

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  • Abstract

    This white paper highlights the VNX replication technologies. It provides information on EMC MirrorView, VNX Replicator, RecoverPoint, Replication Manager, Symmetrix Remote Data Facility (SRDF), and VPLEX. August 2013

    EMC VNX REPLICATION TECHNOLOGIES An Overview

  • 2 VNX Replication Technologies

    Copyright 2013 EMC Corporation. All Rights Reserved. EMC believes the information in this publication is accurate as of its publication date. The information is subject to change without notice. The information in this publication is provided as is. EMC Corporation makes no representations or warranties of any kind with respect to the information in this publication, and specifically disclaims implied warranties of merchantability or fitness for a particular purpose. Use, copying, and distribution of any EMC software described in this publication requires an applicable software license. For the most up-to-date listing of EMC product names, see EMC Corporation Trademarks on EMC.com. VMware is a registered trademark of VMware, Inc. All other trademarks used herein are the property of their respective owners. Part Number h12079

  • 3 VNX Replication Technologies

    Table of Contents

    Executive summary.................................................................................................. 4 Audience ............................................................................................................................ 4

    Terminology ............................................................................................................ 5

    Introduction ............................................................................................................ 6 Supported Replication Technologies .................................................................................. 6

    Replication Technologies Overview .......................................................................... 7 RecoverPoint ...................................................................................................................... 7

    RecoverPoint Topologies ................................................................................................ 7 RecoverPoint Integration with VNX Unisphere ............................................................... 10 Virtual RecoverPoint Appliance (vRPA) .......................................................................... 11 Benefits of RecoverPoint .............................................................................................. 11

    VNX Replicator .................................................................................................................. 12 Virtual Data Mover ........................................................................................................ 13 Advanced Topologies ................................................................................................... 14 Checkpoint and Incremental Attach .............................................................................. 14 Benefits of VNX Replicator ............................................................................................ 15

    MirrorView ........................................................................................................................ 15 MirrorView/Synchronous .............................................................................................. 15 MirrorView/Asynchronous ............................................................................................ 16 Benefits of MirrorView .................................................................................................. 17

    Symmetrix Remote Data Facility (SRDF) ............................................................................. 18 SRDF Replication Modes ............................................................................................... 18 VNX Gateway ................................................................................................................ 19 Unisphere Link and Launch .......................................................................................... 21

    VPLEX ............................................................................................................................... 22 Benefits of VPLEX ......................................................................................................... 23

    Replication Manager ........................................................................................................ 24 Benefits of Replication Manager ................................................................................... 25

    Use Cases ............................................................................................................. 26 Use Case 1: Big Telecommunications Company ................................................................ 26 Use Case 2: Retail Distribution Company .......................................................................... 27 Use Case 3: Small School district ..................................................................................... 29 Use Case 4: Financial Firm ................................................................................................ 30

    Conclusion ............................................................................................................ 32

    References ............................................................................................................ 32

  • 4 VNX Replication Technologies

    Executive summary The amount of data being generated across the world is increasing exponentially. Data generated by various organizations is being stored, mined, transformed, and utilized continuously. Data is a critical component in the operation and function of organizations. Implementing data protection methodologies enables data centers to avoid disruptions in business operations. In every data center there is a need to replicate data for disaster recovery (DR) and redundancy. To protect data from disasters there is a need to implement replication technologies that enable you to securely store multiple copies of data.

    There are many factors involved in choosing the correct replication solution. For example, amount of data that can be lost, time taken to recover, distance between the sites, and so on. VNX systems support various replication technologies developed by EMC which provide a solution to protect your data from disasters. When choosing a replication technology, it is important to choose the appropriate solution that best fits your environment.

    This paper provides information about the following replication technologies supported by the VNX series:

    RecoverPoint

    VNX Replicator

    MirrorView

    SRDF

    VPLEX

    Replication Manager

    Note: This paper does not cover data migrations. Please contact EMC professional services for guidance on choosing the best solution for migration.

    Audience

    This white paper is intended for EMC customers, partners, and employees who want to evaluate and choose a replication solution that best fits their VNX implementation.

  • 5 VNX Replication Technologies

    Terminology Asynchronous Replication A replication mode that enables you to replicate data over long distance, while maintaining a write consistent copy of data at the remote site.

    Bandwidth The amount of data that can be transferred in a given period of time. Bandwidth is usually represented in bytes per second (Bps) or MB/s.

    Common Internet File System (CIFS) An access protocol that allows data access from Windows/Linux hosts located on a network.

    Data Mover A Data Mover is a component that runs its own operating system. It retrieves data from a storage device and makes it available to a network client.

    iSCSI Protocol The iSCSI (internet small computer system interface) protocol provides a mechanism for accessing block-level data storage over network connections. The iSCSI protocol is based on a network-standard client/server model with iSCSI initiators (hosts) acting as storage clients and iSCSI targets acting as storage servers.

    Network Attached storage (NAS) File-based storage for a wide range of clients and applications that access storage over IP connectivity.

    Network File System (NFS) An access protocol that allows data access from Linux/UNIX hosts located on a network

    Recovery Point Objective (RPO) RPO is the maximum amount of data that an organization is willing to lose in case of a disaster. For example, an RPO of 30 seconds means that in case of a disaster, the data that can be lost should not be more than the data generated in 30 seconds.

    Recovery Time Objective (RTO) RTO is the duration of time within which a business process must be restored after a disaster. For example, an RTO of 1 hour means that in case of a disaster, the data needs to be restored in 1 hour.

    Round Trip Time (RTT) RTT is the length of time it takes for a signal to be sent plus the length of time it takes for an acknowledgment of that signal to be received.

    Synchronous Replication A replication mode in which the host initiates a write to the system at local site and the data must be successfully stored in both local and remote sites before an acknowledgement is sent back to the host.

    Standby Data Mover A data mover held in reserve against a failure of an active partner.

    Unisphere A Web-based EMC management interface for creating storage resources, configuring and scheduling protection for stored data. Unisphere is also used for managing and monitoring other storage operations.

    Throughput The rate at which data is transmitted in a given amount of time and is usually represented in IOPs.

  • 6 VNX Replication Technologies

    Introduction To protect against events that may disrupt the production data availability, it is essential for the data to have a redundant copy. You can use Data Replication to create this copy. Replication is a process in which data is duplicated at a remote location, providing an enhanced level of redundancy in case the storage systems at the main production site fail. Having a proper disaster recovery site minimizes the downtime-associated costs and simplifies the recovery process from a disaster.

    VNX series are available in the following configurations: VNX Block only system, VNX File only system, VNX Unified, and VNX Gateway. EMC provides different replication solutions that are available based on the VNX configuration and the data type that needs to be replicated.

    Supported Replication Technologies

    Figure 1 provides a high level overview of the replication/mirroring technologies supported by the VNX storage systems.

    Figure 1 Supported Replication Technologies with VNX Systems

    VNX Unified systems combine File and Block capabilities. You can choose the replication technology for a unified system based on the data type that needs to be replicated.

    MirrorView, RecoverPoint, and SRDF replicate at a block level and provide protection for the entire NAS system. Hence for file system or Virtual Data Mover (VDM) level replication granularity, use VNX replicator.

    Note: This white paper focuses on the information about the replication technologies supported by the VNX series. The same replication technologies may also support legacy EMC Celerra (File) and EMC CLARiiON (Block) systems. Please refer to the E-Lab Interoperability Matrix on the EMC Online Support Website for more information.

  • 7 VNX Replication Technologies

    Replication Technologies Overview

    RecoverPoint

    The EMC RecoverPoint family provides appliance-based, continuous data protection solutions designed to ensure the integrity of production data at local and/or remote sites. RecoverPoint will enable you to centralize and simplify your data protection management, and allow for the recovery of data to nearly any point in time.

    RecoverPoint provides efficient asynchronous replication capability over Internet Protocol (IP) or synchronous replication over Fibre Channel networks. With RecoverPoint, you can create point-in-time, Fibre Channel/iSCSI LUN copies on local or remote sites using one or more storage systems.

    RecoverPoint Topologies

    RecoverPoint supports three different topologies of replication which are described below:

    RecoverPoint Local Continuous Data Protection

    RecoverPoint local Continuous Data protection provides a local replication mode enabling you to roll back to any point in time for effective recovery from events such as database corruption or human errors. Local replication mode is efficient for replication within the local Storage Area Network (SAN) environment.

    RecoverPoint Continuous Remote Replication

    RecoverPoint Continuous Remote Replication provides dynamic synchronous and asynchronous replication for disaster recovery. It provides the option to switch between modes based on user-defined policies for throughput, latency, and bandwidth reduction. RecoverPoint features bi-directional replication (data can be replicated in either direction, source to destination and destination to source systems) and any-point-in-time recovery capability. This allows the destination LUNs to be rolled back to a previous point in time and used for read/write operations without affecting the ongoing replication or data protection.

    Concurrent Local and Remote Replication

    Concurrent Local and Remote Replication protect the same LUNs locally and remotely. It provides simultaneous block-level local and remote replication for the same application LUNs. Recovery of one copy can occur without affecting the other copy. It also supports bi-directional replication and any-point-in-time recovery capability.

  • 8 VNX Replication Technologies

    Figure 2 RecoverPoint Continuous Local, Remote and Concurrent Local and Remote Replication

    Multi-Site

    RecoverPoint multi-site support protects data across remote/branch offices. It reduces infrastructure vulnerability and enables replication of a primary data center to more than one remote site. Remote multi-site synchronous and asynchronous replication helps to meet expanding business continuity requirements. With remote multi-site replication RecoverPoint improves business continuity and affordably replicates remote offices to one central location.

    The RecoverPoint splitter is proprietary software that is embedded on storage subsystems, and is built-into the VNX, Symmetrix, and VPLEX storage systems. The RecoverPoint splitter is used to split the application writes. It splits the writes and sends a copy of the write to the RecoverPoint Appliance (RPA). The splitter carries out this activity efficiently, with little perceptible impact on host performance, since all CPU-intensive processing necessary for replication is performed by the RPA.

    The RecoverPoint family includes the following three products:

    RecoverPoint/SE is targeted for VNX and CLARiiON series systems. It supports the replication of...

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