How does V-Share intercept VSAM I/O?

V-Share intercepts VSAM I/O requests using z/OS authorized services. It redirects these requests to the appropriate CICS region and manages data integrity using locking mechanisms.

What configuration files are used by V-Share?

V-Share uses a configuration file, often named VSADMIN. The file specifies the CICS regions to connect to, VSAM datasets to share, and various control parameters.

Does V-Share expose an API?

V-Share does not expose a direct API. Batch jobs use standard VSAM access methods. V-Share transparently redirects the I/O.

What are the main system components of V-Share?

The main components are the V-Share intercept module (running in the batch address space), the V-Share server (running in a dedicated address space or CICS region), and the VSADMIN configuration file.

How do the V-Share components communicate?

V-Share uses z/OS cross-memory services for communication between the batch address space and the V-Share server. VSAM data is transferred through shared data spaces.

What is the primary business value of V-Share?

V-Share reduces downtime by allowing batch jobs to access CICS VSAM files online. This eliminates the need to quiesce CICS regions for batch processing.

How does V-Share improve batch processing efficiency?

By enabling online access to VSAM data, V-Share improves the efficiency of batch processing. Batch jobs can access data in real-time, reducing delays and improving data accuracy.

How does V-Share reduce operational costs?

V-Share can reduce operational costs by eliminating the need for dedicated batch windows and the associated operational overhead.

How does V-Share improve data integration?

V-Share allows for faster data integration between CICS and batch applications, improving the overall agility of the IT environment.

What security mechanisms does V-Share support?

V-Share supports standard z/OS security mechanisms, including RACF, ACF2, and Top Secret, to control access to VSAM files.

What access control model is used by V-Share?

V-Share uses an access control model based on z/OS security profiles. Access to VSAM files is controlled by defining appropriate security rules in RACF, ACF2, or Top Secret.

Is data encrypted by V-Share?

V-Share does not encrypt VSAM data. Data is transferred in clear text between the batch address space and the V-Share server. Encryption can be implemented at the VSAM level using VSAM encryption features.

What audit logging capabilities exist in V-Share?

V-Share provides audit logging capabilities. All access to VSAM files is logged, including the user ID, date, time, and type of access. These logs can be used for security auditing and compliance.

What administrative interfaces are available?

V-Share provides a command-line interface (CLI) for administrative tasks. The CLI is used to configure V-Share, monitor its status, and manage user access.

How is user management handled in V-Share?

User management is handled through z/OS security. V-Share relies on RACF, ACF2, or Top Secret to authenticate users and control access to VSAM files.

What are the main configuration parameters for V-Share?

The main configuration parameters are defined in the VSADMIN configuration file. These parameters include the CICS regions to connect to, VSAM datasets to share, and various control options.

What monitoring capabilities exist in V-Share?

V-Share provides monitoring capabilities through the CLI and SMF records. The CLI can be used to display the status of V-Share components, while SMF records provide detailed information about VSAM access.

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V-Share

Name: V-Share
Availability: InStock

CSI International Active z/OS zVSE/VSEn

Files and Datasets (VSAM) Sharing CICS

Vendor

CSI International

Product Overview

V-Share's architecture centers around enabling batch jobs to access CICS VSAM files without CICS downtime. The core components are the V-Share intercept module, residing within the batch address space, and the V-Share server, which can run in a dedicated address space or a CICS region. The intercept module redirects VSAM I/O requests to the V-Share server.

Configuration is managed through the VSADMIN file, specifying CICS regions and VSAM datasets. Communication between components relies on z/OS cross-memory services. V-Share integrates with z/OS security profiles (RACF, ACF2, Top Secret) for access control.

Data integrity is maintained through internal locking mechanisms. Competing products may use data replication or require CICS quiescing, introducing latency and downtime. V-Share avoids these issues by providing direct, online access.

Monitoring is achieved through the CLI and SMF records. The system supports standard VSAM access methods (ESDS, KSDS, RRDS).

Frequently Asked Questions

What problem does V-Share solve?

V-Share enables batch jobs to directly access VSAM files managed by CICS without requiring CICS to shut down or quiesce the files. This eliminates downtime and contention.

How does V-Share work technically?

V-Share uses a shared data space architecture. Batch jobs use standard VSAM access methods, while V-Share intercepts and redirects I/O requests to the CICS VSAM files. V-Share manages concurrency and data integrity.

What VSAM file types and CICS environments are supported?

V-Share supports standard VSAM access methods (ESDS, KSDS, RRDS). It works with CICS TS regions.

How is V-Share configured?

V-Share provides configuration options to control the level of data sharing, locking granularity, and transaction isolation. These parameters are set in the V-Share configuration file.

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