US 7,467,163 B1Granted

System and method to manipulate large objects on enterprise server data management system

AssigneeUnisys Corporation

InventorsJames Allen Dodds, Kung Yi Lin, Johnny Hu, Alma Navarro de Jesus, Vikki Mei-Whey Lai, Courtney Chi Hoang, Minh-Nguyet Tran, Subramaniam Ramamurthi, Valerie Renee Schmidt

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Abstract

An Enterprise Server Data Management System provides for the handling of large data objects (LOB) according to the data size required for the large object. Methods are provided to find a particular object that is stored or to delete such an object. But particularly the method arranges for data storage of Large Objects in a structured database, depending on the number of kilobytes forming the Large Object (LOB).

Claims12

Dependent claims

In a database management system employing a server means operating under a specialized Master Control Program and oriented to manage storage and retrieval and manipulation of large objects in digitized format, a system for handling large objects comprising:

(a) a database management server means (DMSII) connected to multiple client-PC stations for the reception of digital data and for the transmission of digital data which encompasses selected sizes of said digital data wherein said database management server means supports said multiple client-PC stations to manipulate large digital objects so to enable a client-PC to (i) insert a large object into database storage (ii) delete a large object from storage or (iii) find a selected large object in storage for subsequent retrieval;
(b) database file means for storing said digital data according to the size of each package of digital data wherein said database file means is organized into memory tanks customized to hold digital large object data according to the size of each large object, and wherein said memory tanks are organized into categories designed where (i) said small tank is sized to hold objects of 6K (kilobytes) or less, (ii) said medium tank is sized to hold objects of size between 6K to 60K (kilobytes) and (iii) said large tank is sized to hold objects of size greater than 60K (kilobytes), and wherein said database file means consists of a sequence of records and each record has a Record Serial Number (RSN) assigned by said server means;
(c) auxiliary support means including a Control File, Audit Files and a Data Management Support Library for controlled communication between said server means and said database file means.

In a database management system utilizing a server means under control of a specialized Master Control Program and oriented to storage of large objects (LOB), where each stored Large Object (LOB) has a selected ID to identify it and utilizing a numbered structure (STR) which holds each stored LOB, plus a record serial number (RSN) which sets a number value to each dataset of related records in a file, wherein a database engine in a server means operates with a database file means to enable a client-PC to manipulate large objects, based on a selected chunk size, a method for handling of large objects in said database file means comprising the steps of:

(a) inserting a large digital object (LOB) into a selected tank memory according to the size of said large digital object said inserting operating to utilize a key index designated SPACE SET for finding an available memory slot;
wherein step (a) of inserting a large digital object (LOB) includes the steps of:
(a1) assigning said selected LOB for storage in said database files;
(a2) selecting a memory storage tank according to the kilobyte (KB) size of said selected LOB;
(a3) querying if said selected LOB can be appended to an already existing LOB object;
(a4) if step (a3) indicates a YES, then querying if said already existing LOB has been found;
(a5) if step (a4) indicates a YES, said already existing LOB is found, then appending said selected LOB on to said already existing LOB;
(b) deleting a stored digital large object according to the selected ID of said large digital object;
(c) finding, locating and retrieving a selected digital large object in said database file means after verifying that said digital large object has a valid ID.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/352,091Filed 10 Feb 2006
Granted: 16 Dec 2008
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

G06F 16/2458
Query processing: special types of queries, e.g. statistical queries, fuzzy queries or distributed queries
G06F 16/2219
Indexing; Data structures therefor; Storage structures: large Object storage; Management thereof
G06F 16/24561
Of query operations: intermediate data storage techniques for performance improvement
Y10S 707/99931
Data processing: database and file management or data structures: database or file accessing

Family

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