The cluster Interconnect serves for management, data communication and Loadbalancingzwecke in a computer cluster and is a component cluster of the manager. In the literature the cluster Interconnect is possibly also called sense-reducing cluster Heartbeat, whereby this function of the "“heart impact"” is only one of several.

Use

The Interconnect of a cluster is a connection between the cluster Membern, over which all kinds are exchanged by relevant data. It is conceived in all rule as private network segment, in order to ensure or also different network architectures to illustrate be able highest possible working reliability. Because this intermediate connection actual as a function of the size of the cluster - to equip with as small a latency and high data transmission rate as possible, in order to create no bottle neck. In addition frequently used technologies are Gigabit Ethernet or also the more expensive InfiniBand.

As mentions initially, the cluster Interconnect serves several purposes:

Heartbeat (cluster Heartbeat)

Under Heartbeat (dt. "“Heart impact"”) understands the computer engineering periodically between matching systems exchanged a signal, similar to feeling the human pulse. This signal serves for the mutual monitoring: If the Heartbeat of a system is missing, an event released to which other to react accordingly to be able. The cluster Interconnect serves here the pure signal transmission. If the opposite side availability monitoring is not realized by a commercial cluster commodity, also software packages are available such as LinuxHA for the security of individual services.

For a pure Heartbeat Interconnect to some time ago also often only a serial cable one used.

Cluster control

A further substantial task of the Interconnects is the management of the cluster. For example purposeful changing of a service over of a knot to the other one coordinated and with as small a down-time as possible must happen. Each cluster commodity used in addition product specific standardized telegrams of different size.

Data communication/data reconciliation

In the case of use of the cluster for the Loadbalancing of application or data base servers it is beyond that important to pass on in certain situations also user data over the cluster Interconnect. By the cluster commodity special telegrams with appropriate utilizable contents are transferred also here, and offered for the above application a API.

Example: Oracle RAC 10g uses the so-called CacheFusion technology. It develops on the fact that already once in the Cache of a cluster knot read in blocks over the Interconnect can be procured faster than by renewed reading in of the mass storage. Also sovereignty control for data base blocks of this data base management system for that sets "“Blockshipping"” transferring mentioned of the data here over the intermediate connection.

Note: The trade names, companies mentioned and marks are property of the respective enterprises.

See also

• Cluster file system
• Quorum (computer science)
• Cluster manager
• Oracle cluster commodity

Articles in category "Cluster Interconnect"

We found here 3 articles.

Related Websites

We found here 3 related websites.

• Cluster Interconnect Analysis and Comparison
  To avoid cluster interconnect saturation, HP recommends ... Channel was the sole cluster interconnect technology when the TruCluster Server product first ...


• Cluster Interconnect Overview
  Cluster Interconnect Overview. Brett M. Bode, Jason J. Hill, and Troy R. Benjegerdes. Scalable Computing Laboratory. Ames Laboratory. Ames, Iowa 50011 ...


• Sun - Cluster Interconnects
  Scalable Coherent Interconnect (SCI). A specialized cluster interconnect for Sun Cluster. Data rate of 70 MBps with latency reduced to 10 microseconds. ...