CA2466117A1 - High speed non-concurrency controlled database - Google Patents

High speed non-concurrency controlled database Download PDF

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Publication number
CA2466117A1
CA2466117A1 CA002466117A CA2466117A CA2466117A1 CA 2466117 A1 CA2466117 A1 CA 2466117A1 CA 002466117 A CA002466117 A CA 002466117A CA 2466117 A CA2466117 A CA 2466117A CA 2466117 A1 CA2466117 A1 CA 2466117A1
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search
database
pointer
network
computer readable
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CA002466117A
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French (fr)
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CA2466117C (en
Inventor
Aristotle Nicholas Balogh
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Verisign Inc
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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/40—Data acquisition and logging
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/46—Multiprogramming arrangements
    • G06F9/50—Allocation of resources, e.g. of the central processing unit [CPU]
    • G06F9/5005—Allocation of resources, e.g. of the central processing unit [CPU] to service a request
    • G06F9/5027—Allocation of resources, e.g. of the central processing unit [CPU] to service a request the resource being a machine, e.g. CPUs, Servers, Terminals
    • G06F9/505—Allocation of resources, e.g. of the central processing unit [CPU] to service a request the resource being a machine, e.g. CPUs, Servers, Terminals considering the load
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/24—Querying
    • G06F16/245—Query processing
    • G06F16/2458—Special types of queries, e.g. statistical queries, fuzzy queries or distributed queries
    • G06F16/2471—Distributed queries
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/23—Updating
    • G06F16/2308—Concurrency control
    • G06F16/2315—Optimistic concurrency control
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/23—Updating
    • G06F16/2358—Change logging, detection, and notification
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/23—Updating
    • G06F16/2365—Ensuring data consistency and integrity
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/24—Querying
    • G06F16/245—Query processing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/46—Multiprogramming arrangements
    • G06F9/54—Interprogram communication
    • G06F9/546—Message passing systems or structures, e.g. queues
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2209/00—Indexing scheme relating to G06F9/00
    • G06F2209/50—Indexing scheme relating to G06F9/50
    • G06F2209/5018—Thread allocation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/953—Organization of data
    • Y10S707/959—Network
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/964—Database arrangement
    • Y10S707/966—Distributed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99931—Database or file accessing
    • Y10S707/99938—Concurrency, e.g. lock management in shared database
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99941—Database schema or data structure
    • Y10S707/99942—Manipulating data structure, e.g. compression, compaction, compilation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99941—Database schema or data structure
    • Y10S707/99943—Generating database or data structure, e.g. via user interface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99951—File or database maintenance
    • Y10S707/99952—Coherency, e.g. same view to multiple users
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99951—File or database maintenance
    • Y10S707/99952—Coherency, e.g. same view to multiple users
    • Y10S707/99953—Recoverability

Abstract

The present invention describes a method and system for high-speed database search with concurrent update, without the use of database locks or access controls, for large database systems. System (100) consists of a plurality of processors (102-1 ... 102-p) coupled to bus (101; a plurality for secondary memory caches (103-1 ...103-p); memory (i.e., RAM)(104); read only memory (ROM) (106); a storage device (108; display i.e., LCD monitor) (110); input device (112); network interfaces (114-1 ...114-O) which may send/ receive electrical signals that represent various information; a wide area network (124); a local area network (LAN) (122); a plurality of network computers (120-1 ...120-N front-end protocol engines; and multiple on-line transaction processing (OLTP) servers (140-1 ... 140-S) to receive update traffic to databases (142-1 ... 142-S).

Claims (54)

1. A multi-threaded network database system, comprising:
at least one processor coupled to a network; and a memory coupled to the processor, the memory including a database and instructions adapted to be executed by the processor to:
create an update thread and a plurality of search threads;
assign each of a plurality of search queries, received over the network, to one of the plurality of search threads;
for each search thread:
search the database according to the assigned search queries, create a plurality of search replies corresponding to the assigned search queries, and send the plurality of search replies over the network; and for the update thread:
create a new element according to new information received over the network, and without restricting access to the database for the plurality of search threads, write a pointer to the new element to the database using a single uninterruptible operation.
2. The system of claim 1, wherein the single uninterruptible operation is a store instruction.
3. The system of claim 1,further comprising:
for the update thread:
physically delete an existing element from the memory after the pointer is written to the database.
4. The system of claim 2, wherein the store instruction writes four bytes to a memory address located on a four byte boundary.
5. The system of claim 2, wherein the store instruction writes eight bytes to a memory address located on an eight byte boundary.
6. The system of claim 2, wherein the processor has a word size of at least n-bytes, the memory has a width of at least n-bytes and the store instruction writes n-bytes to a memory address located on an n-byte boundary.
7. The system of claim 1, wherein the plurality of search queries are received within a single network packet.
8. The system of claim 1, wherein the plurality of search replies are sent within a single network packet.
9. The system of claim 1, wherein said restricting access includes database locking.
10. The system of claim 1, wherein said restricting access includes spin locking.
11. The system of claim 10, wherein said spin locking includes the use of at least one semaphore.
12. The system of claim 11, wherein said semaphore is a mutex semaphore.
13. The system of claim 1, further comprising a plurality of processors and a symmetric multi-processing operating system.
14. The system of claim 13, wherein the plurality of search threads perform at least 100,000 searches per second.
15. The system of claim 14, wherein the update thread performs at least 10,000 updates per second.
16. The system of claim 15, wherein the update thread performs between 50,000 and 130,000 updates per second.
17. The system of claim 1, wherein the pointer to the new element is written to a search index.
18. The system of claim 17, wherein the search index is a TST.
19. The system of claim 17, wherein the search index is a hash table.
20. The system of claim 1, wherein the pointer to the new element is written to a data record within the database.
21. A method for searching and concurrently updating a database, comprising:
creating an update thread and a plurality of search threads;
assigning each of a plurality of search queries, received over a network, to one of the plurality of search threads;
for each search thread:
searching the database according to the assigned search queries, creating a plurality of search replies corresponding to the assigned search queries, and sending the plurality of search replies over the network; and for the update thread:
creating a new element according to new information received over the network, and without restricting access to the database for the plurality of search threads, writing a pointer to the new element to the database using a single uninterruptible operation.
22. The method of claim 21, wherein the single uninterruptible operation is a store instruction.
23. The method of claim 21, further comprising:
for the update thread:
physically deleting an existing element after the pointer is written to the database.
24. The method of claim 22, wherein the store instruction writes four bytes to a memory address located on a four byte boundary.
25. The method of claim 22, wherein the store instruction writes eight bytes to a memory address located on an eight byte boundary.
26. The method of claim 21, wherein the plurality of search queries are received within a single network packet.
27. The method of claim 21, wherein the plurality of search replies are sent within a single network packet.
28. The method of claim 21, wherein said restricting access includes database locking.
29. The method of claim 21, wherein said restricting access includes spin locking.
30. The method of claim 29, wherein said spin locking includes the use of at least one semaphore.
31. The method of claim 30, wherein said semaphore is a mutex semaphore.
32. The method of claim 21, wherein the plurality of search threads perform at least 100,000 searches per second.
33. The method of claim 32, wherein the update thread performs at least 10,000 updates per second.
34. The method of claim 33, wherein the update thread performs between 50,000 and 130,000 updates per second.
35. The method of claim 21, wherein the pointer to the new element is written to a search index.
36. The method of claim 35, wherein the search index is a TST.
37. The method of claim 21, wherein the pointer to the new element is written to a data record within the database.
38. A computer readable medium including instructions adapted to be executed by at least one processor to implement a method for searching and concurrently updating a database, the method comprising:

creating an update thread and a plurality of search threads;
assigning each of a plurality of search queries, received over a network, to one of the plurality of search threads;
for each search thread:
searching a database according to the assigned search queries, creating a plurality of search replies corresponding to the assigned search queries, and sending the plurality of search replies over the network; and for the update thread:
creating a new element according to new information received over the network, and without restricting access to the database for the plurality of search threads, writing a pointer to the new element to the database using a single uninterruptible operation.
39. The computer readable medium of claim 38, wherein the single uninterruptible operation is a store instruction.
40. The computer readable medium of claim 38, wherein said method further comprising:
for the update thread:
physically deleting an existing element after the pointer is written to the database.
41. The computer readable medium of claim 39, wherein the store instruction writes four bytes to a memory address located on a four byte boundary.
42. The computer readable medium of claim 39, wherein the store instruction writes eight bytes to a memory address located on an eight byte boundary.
43. The computer readable medium of claim 38, wherein the plurality of search queries are received within a single network packet.
44. The computer readable medium of claim 38, wherein the plurality of search replies are sent within a single network packet.
45. The computer readable medium of claim 38, wherein said restricting access includes database locking.
46. The computer readable medium of claim 38, wherein said restricting access includes spin locking.
47. The computer readable medium of claim 46, wherein said spin locking includes the use of at least one semaphore.
48. The computer readable medium of claim 47, wherein said semaphore is a mutex semaphore.
49. The computer readable medium of claim 38, wherein the pointer to the new element is written to a search index.
50. The computer readable medium of claim 49, wherein the search index is a TST.
51. The computer readable medium of claim 38, wherein the pointer to the new element is written to a data record within the database.
52. A method for searching and concurrently updating a database, comprising:
creating an update thread and a plurality of search threads;
assigning each of a plurality of search queries, received over the network, to one of the plurality of search threads;
for each search thread:
searching the database according to the assigned search queries, creating a plurality of search replies corresponding to the assigned search queries, and sending the plurality of search replies over the network; and for the update thread:

without restricting access to the database for the plurality of search threads, writing a pointer to an existing element to the database using a single uninterruptible operation.
53. The method of claim 52, wherein the pointer comprises a null pointer.
54. The method of claim 52, further comprising:
for the update thread:
physically deleting the existing element after the pointer is written to the database.
CA2466117A 2001-11-01 2002-11-01 High speed non-concurrency controlled database Expired - Fee Related CA2466117C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US33084201P 2001-11-01 2001-11-01
US60/330,842 2001-11-01
US36516902P 2002-03-19 2002-03-19
US60/365,169 2002-03-19
PCT/US2002/035082 WO2003038596A1 (en) 2001-11-01 2002-11-01 High speed non-concurrency controlled database

Publications (2)

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CA2466117A1 true CA2466117A1 (en) 2003-05-08
CA2466117C CA2466117C (en) 2013-12-31

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ID=26987480

Family Applications (4)

Application Number Title Priority Date Filing Date
CA2466107A Expired - Fee Related CA2466107C (en) 2001-11-01 2002-11-01 Transactional memory manager
CA2466117A Expired - Fee Related CA2466117C (en) 2001-11-01 2002-11-01 High speed non-concurrency controlled database
CA2472014A Expired - Fee Related CA2472014C (en) 2001-11-01 2002-11-01 Method and system for updating a remote database
CA2466110A Expired - Fee Related CA2466110C (en) 2001-11-01 2002-11-01 Method and system for validating remote database updates

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CA2466107A Expired - Fee Related CA2466107C (en) 2001-11-01 2002-11-01 Transactional memory manager

Family Applications After (2)

Application Number Title Priority Date Filing Date
CA2472014A Expired - Fee Related CA2472014C (en) 2001-11-01 2002-11-01 Method and system for updating a remote database
CA2466110A Expired - Fee Related CA2466110C (en) 2001-11-01 2002-11-01 Method and system for validating remote database updates

Country Status (16)

Country Link
US (10) US7047258B2 (en)
EP (10) EP1451728A4 (en)
JP (4) JP4420324B2 (en)
KR (4) KR100970122B1 (en)
CN (4) CN1610877B (en)
AU (5) AU2002356885B2 (en)
BR (4) BR0213862A (en)
CA (4) CA2466107C (en)
EA (4) EA006045B1 (en)
HK (1) HK1075308A1 (en)
IL (8) IL161721A0 (en)
MX (4) MXPA04004202A (en)
NO (4) NO20042261L (en)
NZ (4) NZ532771A (en)
WO (5) WO2003038653A1 (en)
ZA (4) ZA200403597B (en)

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