High Availability And Redundancy - HP IBRIX 9300 Administrator's Manual

IBRIX software is designed to operate with high-performance computing applications that require
high I/O bandwidth, high IOPS throughput, and scalable configurations.
Some of the key features and benefits are as follows:
Scalable configuration. You can add servers to scale performance and add storage devices
to scale capacity.
Single namespace. All directories and files are contained in the same namespace.
Multiple environments. Operates in both the SAN and DAS environments.
High availability. The high-availability software protects servers.
Tuning capability. The system can be tuned for large or small-block I/O.
Flexible configuration. Segments can be migrated dynamically for rebalancing and data
tiering.

High availability and redundancy

The segmented architecture is the basis for fault resilience—loss of access to one or more segments
does not render the entire file system inaccessible. Individual segments can be taken offline
temporarily for maintenance operations and then returned to the file system.
To ensure continuous data access, IBRIX software provides manual and automated failover protection
at various points:
Server. A failed node is powered down and a designated standby server assumes all of its
segment management duties.
Segment. Ownership of each segment on a failed node is transferred to a designated standby
server.
Network interface. The IP address of a failed network interface is transferred to a standby
network interface until the original network interface is operational again.
Storage connection. For servers with HBA-protected Fibre Channel access, failure of the HBA
triggers failover of the node to a designated standby server.
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