Fujitsu ETERNUS AF250 S2 Configuration Manual page 10

FUJITSU Storage ETERNUS AF series and ETERNUS DX S4/S3 series
2.1.3. Overview of Business Server Operation
This section describes how the business servers work with non-stop storage.
The storage system (ETERNUS DX200 S4) is clustered at the storage system layer. If a failure occurs on the Primary storage, the storage
connected to the servers is switched over automatically by making the Secondary storage active.
AST is used to allocate data to the storage system in an efficient manner. Storage clustering is performed at the level of the volumes used for
AST.
Because the business servers are virtualized, users are not aware of which ESXi server they are running on.
If a failure occurs on an ESXi server, its business servers are automatically shifted to another ESXi server and operation continues.
Business
server #1
App
Software
Windows
layer
VMware
vSphere
Server
layer
Switch
layer
Storage
system
layer
(using Storage Cluster for clustering)
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Business
Business
server #2 server #3
....
App App
Linux
Windows
vSphere HA
VMware
....
vSphere
No. of servers: n
Fibre Channel switches
Failure
Flexible Tier Volume (FTV)
Business drives
Figure-3 Overview of business operation
Business
server #n
App
Windows
VMware
vSphere
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ESF
MA MA
Server
Server Probe
ETERNUS
SF
Windows
No. of servers: 1
SAN multipath
LAN, used for operation
and monitoring
http://www.fujitsu.com/eternus/
vCenter
Server