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September 2015 HA-AP Deployment -- Part 1 of 4 Although
the HA-AP solution is extremely flexible and adaptive to any IT
environment, there are basic deployment concepts and models to follow. They
will be smmarized and introdued starting with this installment: · Key
Deployment Concepts ·
The Simplicity Solution Deployment
Model · The
Duality Solution Deployment Model · The
Infinity Soluton Deployment Model Key HA-AP Deployment
Concepts In its most basic
deployment case, a single dual-engine appliance is
installed between a small set of servers and a pair of RAID5 arrays, as
shown in Figure 1. This provides a storage configuration with high
data-delivery performance and instantaneous failover capabilities: Module Connections. Each
Loxoll HA-AP Engine (HAE) has one storage-side and one host-side connection. To
the storage, the Engine appears as the SCSI initiator. To the host, the Engine
appears as the SCSI target. Engine Cluster Data Synchronization. When clustered, a group of Engine modules
synchronize their configuration data. Logical configuration and status
information is shared among all Engine modules. Communications between all
HAE modules is made in-band, through FC connections. Server Perception.
Servers perceive a cluster of Engine modules as a multi-port,
active-active storage system. To the host system, each Engine module in an Engine
Cluster presents a unique World Wide Node Name (WWNN) and multiple World
Wide Port Names (WWPN). However, all Engine modules in a cluster could be
set up to present a single WWNN, if necessary. This enables Loxoll HA-AP to
work with a wide variety of multi-pathing drivers. ... Learn more >> |
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