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Disaster Recovery Solutions Guide

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Disaster Recovery Solutions Guide Disaster Recovery Solutions Guide Dell FS8600 Network-Attached Storage (NAS) FluidFS System Engineering January 2015 Revisions Revision Date Description A October 2013 Initial Release B January 2015 Updated for FluidFS v4 © 2015 Dell Inc. All Rights Reserved. Dell, the Dell logo, and other Dell names and marks are trademarks of Dell Inc. in the US and worldwide. All other trademarks mentioned herein are the property of their respective owners. 2 Disaster Recovery Solutions Guide Table of contents Revisions ............................................................................................................................................................................................. 2 1 Preface ......................................................................................................................................................................................... 4 1.1 Audience ........................................................................................................................................................................... 4 1.2 Purpose ............................................................................................................................................................................. 4 1.3 Disclaimer ......................................................................................................................................................................... 4 1.4 Customer support ........................................................................................................................................................... 4 2 Introduction ................................................................................................................................................................................ 5 2.1 FluidFS replication ........................................................................................................................................................... 6 2.2 FluidFS Replication prerequisites .................................................................................................................................. 7 3 Replication topologies .............................................................................................................................................................. 9 3.1 Single NAS cluster replication topologies .................................................................................................................. 9 3.2 Multiple NAS cluster replication topologies ............................................................................................................. 10 3.3 Disaster Recovery Plan and Best Practices................................................................................................................ 11 4 Configuring replication ........................................................................................................................................................... 12 4.1 Setup prerequisites ....................................................................................................................................................... 12 4.2 Configuring replication – One-to-one configuration ........................................................................................... 12 4.3 Managing replication policies ..................................................................................................................................... 20 5 Disaster Recovery Procedure ................................................................................................................................................ 21 5.1 Failover to secondary site ............................................................................................................................................ 22 5.2 Failback to primary site ................................................................................................................................................ 28 6 Planned Failover Procedure ................................................................................................................................................... 38 6.1 Full Cluster Planned Failover and Failback ............................................................................................................... 38 7 Single NAS Volume Planned Failover and Failback ........................................................................................................... 40 8 Testing Disaster Recovery using Volume Clones .............................................................................................................. 42 A Appendix A: Scripting failover/failback using the FluidFS CLI .......................................................................................... 43 A.1 Replication Setup .......................................................................................................................................................... 43 A.2 Failover CLI Scripting .................................................................................................................................................... 43 A.3 Failback CLI Scripting ................................................................................................................................................... 44 B Appendix B: Additional resources ......................................................................................................................................... 46 3 Disaster Recovery Solutions Guide 1 Preface 1.1 Audience The audience for this document is intended to be systems, networking, storage or backup administrators who are responsible for the day-to-day management responsibilities of a Dell Compellent FS8600 FluidFS NAS solution. Proper management of an FS8600 requires administrators (or teams of administrators) capable of managing and configuring enterprise-class Fibre Channel SAN and Ethernet networks, any enterprise- grade backup software intended to be used, the Dell Compellent Storage Center, as well as general purpose NAS administration 1.2 Purpose The purpose of this document is to help the storage administrator understand the FS8600 disaster recovery mechanism. This document is not intended to be a primer or Dell Compellent FS8600 introductory resource for any of the subject matters involved, and it assumes at least introductory knowledge of many of the subjects covered in this document. This document should be used in conjunction with other Dell Compellent resources as listed in Appendix B – Additional Resources. 1.3 Disclaimer The information contained within this best practices document is intended to provide general recommendations only. Actual configurations in customer environments may need to vary due to individual circumstances, budget constraints, service level agreements, applicable industry-specific regulations, or other factors. Configurations should be tested before implementing them a production environment. 1.4 Customer support Dell Compellent provides live support at 1-866-EZSTORE (866.397.8673), 24 hours a day, 7 days a week, 365 days a year. For additional support, email Dell Compellent at [email protected]. Dell Compellent responds to emails during normal business hours. 4 Disaster Recovery Solutions Guide 2 Introduction The Dell FS8600 scale-out NAS solution running Fluid File System (FluidFS) version 4 has several built-in features that help businesses protect against unplanned outages and data loss. Downtime and loss of data, even if temporary, can be very costly for an organization. Extended downtime can even be fatal to an organization. The best practice for protecting data against disasters is typically to create and keep copies of important data in a different location so it can always be recovered. FluidFS v4 running on an FS8600 NAS appliance offers powerful, flexible and easy-to-manage asynchronous replication for disaster recovery. Below is an example of a possible DR solution. This image shows a DR configuration between four production sites and one DR site. All production sites are replicating volumes to one DR site using FluidFS replication. In case of a production site failure, the storage administrator can recover from the DR site. Production Site(FL) Production Site(BC) Global Remote DR Site (MN) Production Site(TX) Production Site(NY) Figure 1 Possible DR solution between four production sites and one centralized DR site. 5 Disaster Recovery Solutions Guide 2.1 FluidFS replication FS8600 appliances run Dell Fluid File System (FluidFS) to provide file services to clients. Up to four FS8600 NAS appliances can be clustered together to build a single scale-out NAS cluster. FluidFS includes snapshot-based asynchronous replication between two FS8600 NAS clusters. FluidFS does not support utilizing SAN-based snapshots or replication to protect data. While all NAS data is stored on a backing SAN via a FluidFS cluster, all snapshotting and replication of NAS data takes place between FluidFS clusters and not the backing SANs. FluidFS replication operates at the NAS volume level. A NAS volume may contain one or more SMB shares or NFS exports. An entire volume is replicated to another volume, either on the same NAS cluster or on another remote NAS cluster. The destination volume is an exact replica of the source volumes folders and files, and it can be configured to be an exact replica of the source volumes configuration items, including
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