The Growing Need for Clustering
These days, high availability
is in demand. No company would afford to lose a customer when
the services they offer to be unreachable, especially since
that downtime will almost undoubtedly cost them money. High
Availability services offered in most load sharing and balancing
software and clustering on NT or Linux clusters offers the
solution to this need for a lack of downtime.
as a technology has been used for many years
but has only recently started to become popular on Intel-based
servers. The clustering UltraStor RAID subsystems have two
host channels, which make them perfect for NT or UNIX clustering
systems. Simply hook it up to two UNIX OR NT Enterprise servers
using a standard SCSI card. The system just thinks it is a
very large hard disk. RAID functions are controlled by the
front panel on the system or can be controlled by a serial
port from a computer.
is Clustering & High Availability?
cluster is two or more interconnected servers (sometimes called
nodes) that create a solution to provide higher availability,
higher scalability or both. The advantage of clustering servers
for high availability is seen if one node fails, another node
in the cluster can assume the workload of the failed node,
and users see no interruption of access. The advantages of
clustering servers for scalability include increased application
performance and a greater number of users that can be supported.
You can think of a cluster of servers as if they were a single,
unified computing resource. With the total redundancy of multiple
servers, the cluster can help achieve greater system uptime.
can be implemented at different levels of the system, including
hardware, operating systems, middleware, systems management
and applications. The more layers that incorporate clustering
technology, the more reliable, scalable and manageable the
The UltraStor™ Advantage
has the advantages over other hardware used in clustering:
it runs on dual SCSI ports and provides redundancy and fault
tolerance as required in any RAID application. Top-rated redundant
hot-swat 300watt power supply and triple hi-speed hot-swap
blowers from Delta Electronics, the leader in the power &
electronics industry, demonstrates our emphasis on providing
superior quality on hardware components in order to meet the
100% uptime required by most mission critical applications.
The Power PC based processor deployed in UltraStor RAID
engine proved not only reliable, but also excellent in speed
performance, which was recently certified by NLE application
leader Leitch in meeting their power hungry 4-stream video