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Method and System for Serialization and Parallel Rebuild of Virtual Storage Access Method (VSAM)Record-Level Sharing (RLS)Multiple Lock Structures

IP.com Disclosure Number: IPCOM000234870D
Publication Date: 2014-Feb-11
Document File: 2 page(s) / 119K

Publishing Venue

The IP.com Prior Art Database

Abstract

A method and system is disclosed for serialization and parallel rebuild of virtual storage access method (VSAM) record-level sharing (RLS) multiple lock structures.

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Page 01 of 2

Method and System for Serialization and Parallel Rebuild of Virtual Storage Access Method (VSAM)Record-Level Sharing (RLS)Multiple Lock Structures

Disclosed is a method and system for serialization and parallel rebuild of virtual storage access method (VSAM) record-level sharing (RLS) multiple lock structures. The method and system provides a serialization technique for implementation in VSAM RLS between a process of rebuilding a lock structure and other internal processes that access the lock structure for maintaining data integrity as shown in the figure.

Figure

In accordance with the method and system, serialization technique is performed using a single lock structure and multiple lock structures.

Using a single lock structure:


Rebuild start ---> | In SMSVSAM address space, obtain the | IGWLOCK00

| following serialization:

|

| 1.GRS Latch -IGWLOCK00 - Exclusive |

Rebuild complete ---> | In SMSVSAM address space, release the | IGWLOCK00 or

| following serialization:

|

Rebuild stop complete| 1.GRS Latch -IGWLOCK00 - Exclusive |

Using multiple lock structures:

1


Page 02 of 2

Rebuild start ---> | In SMSVSAM address space, obtain the | Secondary lock1
| following serialization:

|

| 1.GRS Latch -secondary lock1- Exclusive |

Rebuild complete ---> | In SMSVSAM address space, release the | Secondary lock1 or

| following serialization:
|

Rebuild stop complete | 1.GRS Latch -secondary lock1- Exclusive |

Thus, the method and system implements serialization technique while...