公开(公告)号：DE69327892D1

公开(公告)日：2000-03-30

申请号：DE69327892

申请日：1993-08-25

Applicant: IBM

Inventor： BEARDSLEY BRENT CAMERON ,  BENHASE MICHAEL THOMAS ,  BLOUNT LAWRENCE CARTER ,  CANDELARIA SUSAN KAY ,  HYDE JOSEPH SMITH

IPC: G06F3/06 ,  G06F13/12

Abstract: A storage system controller, coupled to one or more host computers via multiple communication channels, is utilized to control access to one or more direct access storage devices. A host computer authorizes the storage system controller to search within a range of data locations within the storage system, sets an initial location from which the data search will begin, and specifies a key field argument to search for. The host computer then permits the storage system controller to independently search the authorized range of data locations within the storage system or within cache memory within the storage system controller. The storage system controller examines multiple records within the authorized range of data locations to locate a desired record associated with the key field argument and presents a status report to the host computer only after the desired record is located or the entire range of data is searched and the desired record was not located.

公开(公告)号：GB2516799A

公开(公告)日：2015-02-04

申请号：GB201421353

申请日：2013-05-06

Applicant: IBM

Inventor： HYDE JOSEPH SMITH ,  ROY SUNHOJIT

IPC: G06F12/12

Abstract: For a cache in which a plurality of frequently accessed data segments are temporarily stored, reference count information of the plurality of data segments, in conjunction with least recently used (LRU) information, is used to determine a length of time to retain the plurality of data segments in the cache according to a predetermined weight, where notwithstanding the LRU information, those of the plurality of data segments having a higher reference counts are retained longer than those having lower reference counts.

公开(公告)号：DE112013002355T5

公开(公告)日：2015-01-15

申请号：DE112013002355

申请日：2013-05-06

Applicant: IBM

Inventor： HYDE JOSEPH SMITH ,  ROY SUNHOJIT

IPC: G06F12/02

Abstract: Für einen Zwischenspeicher, in dem eine Vielzahl von Datensegmenten vorübergehend gespeichert ist, auf die häufig zugegriffen wird, werden Referenzzählerinformationen über die Vielzahl von Datensegmenten in Verbindung mit Least-Recently-Used-(LRU)Informationen verwendet, um eine Zeitlänge zum Beibehalten der Vielzahl von Datensegmenten in dem Zwischenspeicher gemäß einer vordefinierten Gewichtung zu bestimmen, wobei ungeachtet der LRU-Informationen diejenigen der Vielzahl von Datensegmenten mit höheren Referenzzählern länger beibehalten werden als diejenigen mit niedrigeren Referenzzählern.

公开(公告)号：DE69327892T2

公开(公告)日：2000-10-12

申请号：DE69327892

申请日：1993-08-25

Applicant: IBM

Inventor： BEARDSLEY BRENT CAMERON ,  BENHASE MICHAEL THOMAS ,  BLOUNT LAWRENCE CARTER ,  CANDELARIA SUSAN KAY ,  HYDE JOSEPH SMITH

IPC: G06F3/06 ,  G06F13/12

Abstract: A storage system controller, coupled to one or more host computers via multiple communication channels, is utilized to control access to one or more direct access storage devices. A host computer authorizes the storage system controller to search within a range of data locations within the storage system, sets an initial location from which the data search will begin, and specifies a key field argument to search for. The host computer then permits the storage system controller to independently search the authorized range of data locations within the storage system or within cache memory within the storage system controller. The storage system controller examines multiple records within the authorized range of data locations to locate a desired record associated with the key field argument and presents a status report to the host computer only after the desired record is located or the entire range of data is searched and the desired record was not located.