Instantly built information space (IBIS)

• US 8,458,217 B1
• Filed: 08/24/2009
• Issued: 06/04/2013
• Est. Priority Date: 08/24/2009
• Status: Active Grant

• Current Assignee: Advent Software Incorporated (SS&C Technologies Holdings Incorporated)
• Original Assignee: Advent Software Incorporated (SS&C Technologies Holdings Incorporated)
• Inventors: McGrogan, Stephen K., Ro, Kwang T., Gido, James M.
• Primary Examiner(s): Perveen, Rehana
• Assistant Examiner(s): Waldron, Scott A
• Application Number:
  US12/546,205
• Time in Patent Office: 1,380 Days
• Field of Search: 707/792
• US Class Current: 707/792
• CPC Class Codes: G06F 12/1036 for multiple virtual address spaces, e.g. segmentation G06F12/1045 takes precedence
• CPC Class Codes: G06F 16/24552 Database cache management
• CPC Class Codes: G06F 2212/1021 Hit rate improvement

Abstract

A computer system for generating an Instantly Built Information Space (IBIS) for use with an application program is provided. The application program connects to a data repository. The application program connects to at least one Bookkeeping Information Space (BIS). The address of a main database object of the BIS is placed into a knowledge base pointer. The address of a main database object of the database is placed into a pointer in an object of the BIS. The database and the BIS are included in the IBIS. The BIS is accessed by the application program through the knowledge base pointer and the database is accessed by the application program through the pointer in the object of the BIS.

Claims

1. A programmable computer system for generating an Instantly Built Information Space (IBIS) for use with an application program, the application program associated with an operating system, the computer system comprising:

means for connecting the application program to a data repository for a first database, the data repository including a plurality of memory-mapped segment files stored on at least one nonvolatile memory medium, wherein data in the data repository is not copied into main memory of the computer system from the data repository when needed by the application program;

means for connecting the application program to a Bookkeeping Information Space (BIS);

means for placing an address of a main database object of the BIS into a knowledge base pointer;

means for placing an address of a main database object of the first database into a pointer in an object of the BIS;

means for registering a fault handler with the operating system, the fault handler associated with the first database and the BIS;

means for catching, by the fault handler, a segmentation fault issued for an object referenced by the application program and resident in the first database or the BIS, the segmentation fault issued at an interrupt location in the application program;

means for finding a one of the plurality of segment files of the first database or the BIS that corresponds to the object referenced by the application program;

means for mapping the found segment file into the main memory of the computer system;

means for restarting the application program at the interrupt location;

wherein the IBIS comprises the first database and the BIS;

means for the application program to access the BIS through the knowledge base pointer and the first database through the pointer in the object of the BIS; and

wherein the BIS comprises a second database containing only one variant of each of a plurality of objects from the first database.

2. The programmable computer system of claim 1, wherein the plurality of memory-mapped segment files include at least one portfolio segment and at least one price segment.

3. The programmable computer system of claim 1, further comprising:

means for detecting a change to an object in the BIS, wherein the change comprises one of an addition, deletion, or modification of the object;

means for determining an original page in a segment file of the BIS with the object subject to the change;

means for determining a process responsible for the change;

means for creating a local memory mapped copy of the original page in the segment file of the BIS with the object subject to the change;

means for applying the change to the object on the local memory mapped copy of the original page in the segment file, wherein the object in the original page in the segment file is not changed;

means for restricting the process responsible for the change from accessing the original page in the segment file by redirecting the process to the local memory mapped copy of the original page.

4. The programmable computer system of claim 1, further comprising:

means for connecting to a second BIS;

means for placing an address of a main database object of the second BIS into the knowledge base pointer; and

means for placing the address of the main database object of the BIS into a pointer in an object of the second BIS.

5. The programmable computer system of claim 1, wherein the BIS comprises quasi-persistent objects.

6. The programmable computer system of claim 1 wherein objects in the BIS are directly interconnected by memory pointers.

7. The programmable computer system of claim 1, wherein the objects in the BIS are directly connected to the objects in the first database by memory pointers from the BIS to the first database.

8. The programmable computer system of claim 1, wherein each object includes a virtual function pointer, the virtual function pointer pointing to a shared memory area of the computer system holding virtual function tables associated with object types.

9. The programmable computer system of claim 1, further comprising means for the application program to directly access the data in the first database and the BIS without copying the data into the main memory of the computer system.

10. The programmable computer system of claim 1, wherein the application program is a portfolio management application, and the first database is a portfolio management database.

11. The programmable computer system of claim 1, wherein the first database is a Segmented Advent Global Area (SAGA) database.

12. A method for using a computer system to generate an Instantly Built Information Space (IBIS) for use with an application program, the application program associated with an operating system, the method comprising:

connecting the application program, on the computer system, to a data repository for a first database, the data repository including a plurality of memory-mapped segment files stored on at least one nonvolatile memory medium, wherein data in the data repository is not copied into main memory of the computer system from the data repository when needed by the application program;

connecting the application program, on the computer system, to a Bookkeeping Information Space (BIS);

placing, on the computer system, the address of a main database object of the BIS into a knowledge base pointer;

placing, on the computer system, the address of a main database object of the first database into a pointer in an object of the BIS;

registering, using the computer system, a fault handler with the operating system, the fault handler associated with the first database and the BIS;

catching, using the computer system, by the fault handler, a segmentation fault issued for an object referenced by the application program and resident in the first database or the BIS, the segmentation fault issued at an interrupt location in the application program;

finding, using the computer system, one of the plurality of memory-mapped segment files of the first database or the BIS that corresponds to the object referenced by the application program;

mapping, using the computer system, the found memory-mapped segment file into the main memory of the computer system;

restarting, using the computer system, the application program at the interrupt location;

wherein the IBIS comprises the first database and the BIS;

accessing by the application program, on the computer system, the BIS through the knowledge base pointer and the first database through the pointer in the object of the BIS; and

wherein the BIS comprises a second database containing only one variant of each of a plurality of objects from the first database.

13. The method of claim 12, further comprising:

detecting, using the computer system, a change to an object in the BIS, wherein the change comprises one of an addition, deletion, or modification of the object;

determining, using the computer system, an original page in a segment file of the BIS with the object subject to the change;

determining, using the computer system, a process responsible for the change;

creating, using the computer system, a local memory mapped copy of the original page in the segment file of the BIS with the object subject to the change;

applying, using the computer system, the change to the object on the local memory mapped copy of the original page in the segment file, wherein the object in the original page in the segment file is not changed;

restricting, using the computer system, the process responsible for the change from accessing the original page in the segment file by redirecting the process to the local memory mapped copy of the original page.

14. The method of claim 12, further comprising:

connecting, using the computer system, to a second BIS;

placing, using the computer system, an address of a main database object of the second BIS into the knowledge base pointer; and

placing, using the computer system, the address of the main database object of the BIS into a pointer in an object of the second BIS.

15. The method of claim 12, wherein the BIS comprises quasi-persistent objects.

16. The method of claim 12, wherein the application program is a portfolio management application, and the first database is a portfolio management database.

17. The method of claim 12, wherein the first database is a Segmented Advent Global Area (SAGA) database.

18. A programmable computer system for generating an Instantly Built Information Space (IBIS) for use with an application program, the application program associated with an operating system, the computer system comprising:

means for connecting to a data repository for a first database, the data repository including a plurality of memory-mapped segment files stored on at least one nonvolatile memory medium, wherein data in the data repository is not copied into main memory of the computer system from the data repository when needed by the application program;

means for connecting to a Bookkeeping Information Space (BIS);

means for placing an address of a main database object of the BIS into a knowledge base pointer such that the knowledge base pointer points to the BIS when accessed by the application program;

means for placing an address of a main database object of the first database into a pointer in an object of the BIS such that the object of the BIS points to the first database when accessed by the application program;

means for registering a fault handler with the operating system, the fault handler associated with the first database and the BIS;

means for catching, by the fault handler, a segmentation fault issued for an object referenced by the application program and resident in the first database or the BIS, the segmentation fault issued at an interrupt location in the application program;

means for finding one of the plurality of memory-mapped segment files of the first database or the BIS that corresponds to the object referenced by the application program;

means for mapping the found segment file into the main memory of the computer system;

means for restarting the application program at the interrupt location,

wherein the IBIS comprises the first database and the BIS;

wherein the application program accesses the BIS through the knowledge base pointer and the first database through the pointer in the object of the BIS; and

wherein the BIS comprises a second database containing only one variant of each of a plurality of objects from the first database.

19. A non-transitory computer-readable memory medium including computer executable instructions for programming a computer system to generate an Instantly Built Information Space (IBIS) for use with an application program, the application program associated with an operating system, the non-transitory computer-readable memory medium comprising:

means for connecting the application program to a data repository for a first database, the data repository including a plurality of memory-mapped segment files stored on at least one nonvolatile memory medium, wherein data in the data repository is not copied into main memory of the computer system from the data repository when needed by the application program;

means for connecting the application program to a Bookkeeping Information Space (BIS);

means for placing an address of a main database object of the BIS into a knowledge base pointer;

means for placing an address of a main database object of the database into a pointer in an object of the BIS;

means for registering a fault handler with the operating system, the fault handler associated with the first database and the BIS;

means for catching, by the fault handler, a segmentation fault issued for an object referenced by the application program and resident in the first database or the BIS, the segmentation fault issued at an interrupt location in the application program;

means for finding one of the plurality of memory-mapped segment files of the first database or the BIS that corresponds to the object referenced by the application program;

means for mapping the found segment file into the main memory of the computer system;

means for restarting the application program at the interrupt location;

wherein the IBIS comprises the database and the BIS;

means for the application program to access the BIS through the knowledge base pointer and the database through the pointer in the object of the BIS; and

wherein the BIS comprises a second database containing only one variant of each of a plurality of objects from the first database.