Failover Supported by Open-E Software

Failover Solutions with Open-E Data Storage Server (DSS V6)

Software Version: DSS ver. 6.00 up85

Presentation updated: September 2011

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

www.open-e.com

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Failover Solutions Supported by Open-E DSS
Replication Mode Asynchronous Synchronous

Source/Destination w/ System

Data Transfer Block based File based

Volume Type iSCSI NAS Block-IO File-IO FC

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.

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WAN

LAN

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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 • Higher cost solution • Natural disasters can destroy both local systems
www.open-e.com 4

 Disadvantages

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 Read Data

Write Data

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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 e-mail notification to the administrator. • Automatic Failover is executed and users are switched to System 2 (secondary).

PING NODE

RAID System 1 Primary

X

Heartbeat

RAID System 2 Secondary

Control

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iSCSI Failover using Volume Replication
• After switchover, the replicated volume is available on System 2 (secondary)

PING NODE

RAID System 1 Primary

X

RAID System 2 Secondary

Write Data Read Data

www.open-e.com

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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, 2 license keys.

 Benefits

• Eliminates business disruption • Data Redundancy over a LAN • Switch Redundancy • Higher cost of solution • Natural disasters (earthquake, fire, flood...) can destroy both local systems
www.open-e.com 8

 Disadvantages

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 RAID System 2 Secondary

Heartbeat Volume Replication

PING NODEs

Control Read Data

Write Data

www.open-e.com

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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 e-mail Notification to the administrator. • Automatic Failover is executed and users are switched to System 2 (secondary).
RAID System 1 Primary RAID System 2 Secondary Heartbeat

X
Control

PING NODEs

Write Data Read Data

www.open-e.com

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NFS Failover using Volume Replication
• After switchover, the replicated volume is available on System 2 (secondary)
RAID System 1 Primary

X
Read Data

RAID System 2 Secondary

PING NODEs

Write Data

www.open-e.com

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Thank you!

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