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Data centers (Fibre Channel, iSCSI)


Nowadays, when hunger for accessibility and speed of access to information is growing, it is still more systems of interconnected data repositories and servers. One possible solution is cluster.


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A general description of the cluster

It is the interconnection of loosely-bound computers that communicate together and can be connected to the environment look like the only system. Individual computers are usually connected by a computer network and using clustering can achieve higher computing speeds or reliability with greater efficiency than which would be achieved by using one specially designed computing station.

Clusters are used in parallel tasks or are suitable for Ensuring high availability of individual services (eg database access, email server, web server, etc.). Multiple CPUs are mostly used to create a cluster connected by a data network. Individual services to be processed by clustering must be adapted to cluster traffic.

The most important part of the cluster is a high-quality, shared storage of data from which quality is developed of the entire cluster. Data stored in the central repository is common to all servers.


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Cluster types

There are several types of clusters. The individual functions and properties of the clusters are intertwined to be optimum parameters are achieved:

  • Cluster with high availability (High-availability, HA) - using several computers                          ensure the continuous performance of a particular service even in the event of a failure of one or more servers                          due to hardware failure or scheduled maintenance.
  • A high-performance computing cluster (HPC) cluster is used to increase computing                          the speed of multiple computers that collaborate on a common calculation.
  • Load Balancing (LB) Load Balancing Load is achieved by each service is provided to multiple computers at the same time. These computers have the same content and the service is provided in parallel.
  • Storage cluster (SC) - This clustering type provides access to disk capacity that is spread between individual workstations.

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Example schematic of cluster engagement using technology Fibre Channel

Cluster 1.

The main benefits of using a cluster connection Fibre Channel

  • high baud rate
  • will not affect the operation of the existing network
  • Long distance data transfer

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Example schematic of cluster engagement using technology iSCSI

Cluster 2.

The main benefits of using a cluster connection iSCSI

  • using the existing structured network without the need to build a new infrastructure
  • software resources remain the same

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