公开(公告)号：DE2914132A1

公开(公告)日：1979-11-15

申请号：DE2914132

申请日：1979-04-07

Applicant: IBM

Inventor： CHANG HSU ,  NIGAM ANIL

IPC: G11C11/14 ,  G06F17/30 ,  G11C19/08 ,  G06F7/02

Abstract: A relational data base system using magnetic bubble domain storage to eliminate data formatting, and dynamic indexing loops to facilitate convenient marking during data qualification and to eliminate redundant traversing of disqualified data during the search operation. A data base is stored in columnized storage tables which insure minimum input/output data traffic during search and retrieval. A suitable storage chip is organized in a major/minor loop organization, with several sections of transfer lines to provide selective access to individual groups of storage loops. Off-chip circuitry includes a comparator for comparing data read from a bubble storage chip with a given criterion in order to select appropriate data, and a dynamic indexing loop which keeps track of comparisons. This indexing loop provides an input to a bubble chip controller so that each subsequent search and compare is done only on already qualified data. This eliminates the need for repeated searching through the same data.

公开(公告)号：CA1127760A

公开(公告)日：1982-07-13

申请号：CA323624

申请日：1979-03-15

Applicant: IBM

Inventor： CHANG HSU ,  NIGAM ANIL

IPC: G11C11/14 ,  G06F17/30

Abstract: BUBBLE DOMAIN RELATIONAL DATA BASE SYSTEM A relational data base system using magnetic bubble domain storage to eliminate data formatting, and dynamic indexing loops to facilitate convenient marking during data qualification and to eliminate redundant traversing of disqualified data during the search operation. A data base is stored in columnized storage tables which insure minimum input/output data traffic during search and retrieval. A suitable storage chip is organized in a major/minor loop organization, with several sections of transfer lines to provide selective access to individual groups of storage loops. Off-chip circuitry includes a comparator for comparing data read from a bubble storage chip with a given criterion in order to select appropriate data, and a dynamic indexing loop which keeps track of comparisons. This indexing loop provides an input to a bubble chip controller so that each subsequent search and compare is done only on already qualified data. This eliminates the need for repeated searching through the same data. YO978-008

公开(公告)号：FR2425109A1

公开(公告)日：1979-11-30

申请号：FR7909108

申请日：1979-04-04

Applicant: IBM

Inventor： CHANG HSU ,  NIGAM ANIL

IPC: G11C11/14 ,  G06F17/30 ,  G06F7/28

Abstract: A relational data base system using magnetic bubble domain storage to eliminate data formatting, and dynamic indexing loops to facilitate convenient marking during data qualification and to eliminate redundant traversing of disqualified data during the search operation. A data base is stored in columnized storage tables which insure minimum input/output data traffic during search and retrieval. A suitable storage chip is organized in a major/minor loop organization, with several sections of transfer lines to provide selective access to individual groups of storage loops. Off-chip circuitry includes a comparator for comparing data read from a bubble storage chip with a given criterion in order to select appropriate data, and a dynamic indexing loop which keeps track of comparisons. This indexing loop provides an input to a bubble chip controller so that each subsequent search and compare is done only on already qualified data. This eliminates the need for repeated searching through the same data.