Failover Solutions with Open-E Data Storage Server (DSS V6)
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1 Failover Solutions with Open-E Data Storage Server (DSS V6) Software Version: DSS ver up85 Presentation updated: September 2011
2 Failover Solutions Supported by Open-E DSS Open-E DSS supports two types of Failover over a LAN: Failover for iscsi appliances using Synchronous Volume Replication Failover for NFS appliances using Synchronous Volume Replication 2
3 Synchronous Asynchronous w/ System LAN WAN File based Block based NAS File-IO Block-IO FC Failover Solutions Supported by Open-E DSS Replication Mode Source/Destination Data Transfer Volume Type iscsi iscsi Failover (using Synchronous Volume Replication) NSF Failover (using Synchronous Volume Replication) Auto Failover on a LAN using Volume Replication for NAS (NFS) or iscsi is a fault tolerant process via NFS or iscsi Volume Replication that creates mirrored target data volumes. Data is copied in real-time. Every change is immediately mirrored on the secondary storage server. In the case of a failure, scheduled maintenance of the primary server, or loss of the primary data source, failover automatically switches operations to the secondary storage server so all processing can continue as usual. 3
4 iscsi Failover using Volume Replication ISCSI FAILOVER USING VOLUME REPLICATION BETWEEN TWO SYSTEMS WITHIN ONE LAN Recommended Resources Key Hardware (two systems) x86 compatible RAID Controller with Battery Backup Unit HDD s Network Interface Cards Ping Node (ping node can be any permanently (24/7) available host in the network. Alternatively the ping node function can be performed by the server storing the data on the iscsi failover volume. Software Open-E DSS, 2 units Benefits Eliminates business disruption Provides data redundancy over a LAN Enables switch redundancy Disadvantages Higher cost solution Natural disasters can destroy both local systems 4
5 iscsi Failover using Volume Replication Data is written and read on System 1 (primary) Data is continually replicated to System 2 (secondary) Heartbeat Volume Replication PING NODE RAID System 1 Primary RAID System 2 Secondary Control Write Data Read Data 5
6 iscsi Failover using Volume Replication In the case of a system malfunction, power failure or loss of network connection on System 1 (primary), the server will send an notification to the administrator. Automatic Failover is executed and users are switched to System 2 (secondary). X Heartbeat PING NODE RAID System 1 Primary RAID System 2 Secondary Control 6
7 iscsi Failover using Volume Replication After switchover, the replicated volume is available on System 2 (secondary) PING NODE X RAID System 1 Primary RAID System 2 Secondary Write Data Read Data 7
8 NFS Failover using Volume Replication NFS FAILOVER USING VOLUME REPLICATION BETWEEN TWO SYSTEMS WITHIN ONE LAN Recommended Resources Key Hardware (two systems) x86 compatible RAID Controller with Battery Backup Unit HDD s Network Interface Cards Ping Node (ping node it is any permanently (24/7) available host in the network. Alternatively the ping node function can be performed by the server storing the data on the failover volume). Software Open-E DSS V6, 2 units NFS Failover Feature Pack, 1 license key Benefits Eliminates business disruption Data Redundancy over a LAN Switch Redundancy Disadvantages Higher cost of solution Natural disasters (earthquake, fire, flood...) can destroy both local systems 8
9 NFS Failover using Volume Replication Data is written and read on System 1 (primary) Data is continually replicated to System 2 (secondary) RAID System 1 Primary Heartbeat RAID System 2 Secondary Volume Replication PING NODEs Control Write Data Read Data 9
10 NFS Failover using Volume Replication In the case of system malfunction, power failure or lost network connection on System1 (primary), the server will send an Notification to the administrator. Automatic Failover is executed and users are switched to System 2 (secondary). RAID System 1 Primary X Heartbeat RAID System 2 Secondary PING NODEs Control Write Data Read Data 10
11 NFS Failover using Volume Replication After switchover, the replicated volume is available on System 2 (secondary) RAID System 1 Primary RAID System 2 Secondary X PING NODEs Write Data Read Data 11
12 Thank you! Follow Open-E: 12
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