| dbo:abstract
|
- The DBC/1012 Data Base Computer was a database machine introduced by Teradata Corporation in 1984, as a back-end data base management system for mainframe computers. The DBC/1012 harnessed multiple Intel microprocessors, each with its own dedicated disk drive, by interconnecting them with the Ynet switching network in a massively parallel processing system.The DBC/1012 was designed to manage databases up to one terabyte (1,000,000,000,000 characters) in size; "1012" in the name refers to "10 to the power of 12". Major components included:
* Mainframe-resident software to manage users and transfer data
* Interface processor (IFP) - the hardware connection between the mainframe and the DBC/1012
* Ynet - a custom-built system interconnect that supported broadcast and sorting
* Access module processor (AMP) - the unit of parallelism: includes microprocessor, disk drive, file system, and database software
* System console and printer
* TEQUEL (TEradata QUEry Language) - an extension of SQL The DBC/1012 was designed to scale up to 1024 Ynet interconnected processor-disk units. Rows of a relation (table) were distributed by hashing on the primary database index. The DBC/1012 used a 474 megabyte Winchester disk drive with an average seek time of 18 milliseconds. The disk drive was capable of transferring data at 1.9 MB/s although in practice the sustainable data rate was lower because the IO pattern tended towards random access and transfer lengths of 8 to 12 kilobytes. The processor cabinet was 60 inches high and 27 inches wide, weighed 450 pounds, and held up to 8 microprocessor units.The storage cabinet was 60 inches high and 27 inches wide, weighed 625 pounds, and held up to 4 disk storage units. The DBC/1012 preceded the advent of redundant array of independent disks (RAID) technology, so data protection was provided by the "fallback" feature, which kept a logical copy of rows of a relation on different AMPs. The collection of AMPs that provided this protection for each other was called a cluster. A cluster could have from 2 to 16 AMPs. The product could be integrated with optical disc drives. There were at least four models, marketed through about 1993. (en)
|
| dbo:thumbnail
| |
| dbo:wikiPageID
| |
| dbo:wikiPageLength
|
- 4559 (xsd:nonNegativeInteger)
|
| dbo:wikiPageRevisionID
| |
| dbo:wikiPageWikiLink
| |
| dbp:wikiPageUsesTemplate
| |
| dct:subject
| |
| rdf:type
| |
| rdfs:comment
|
- The DBC/1012 Data Base Computer was a database machine introduced by Teradata Corporation in 1984, as a back-end data base management system for mainframe computers. The DBC/1012 harnessed multiple Intel microprocessors, each with its own dedicated disk drive, by interconnecting them with the Ynet switching network in a massively parallel processing system.The DBC/1012 was designed to manage databases up to one terabyte (1,000,000,000,000 characters) in size; "1012" in the name refers to "10 to the power of 12". Major components included: (en)
|
| rdfs:label
| |
| owl:sameAs
| |
| prov:wasDerivedFrom
| |
| foaf:depiction
| |
| foaf:isPrimaryTopicOf
| |
| is dbo:wikiPageDisambiguates
of | |
| is dbo:wikiPageWikiLink
of | |
| is foaf:primaryTopic
of | |
