SCC DLimit tracks disk storage utilization at the application level, preventing runaway space use and automatically notifying storage administrators when specified limits are exceeded.
SCC DLIMIT provides storage administrators and users with an up-to-the-minute view of the storage space used by the data belonging to an application. Tracking and monitoring space use and preventing unlimited growth in application space is particularly important in a system-managed environment, where DASD volume boundaries are eliminated. Storage Control Center DLIMIT allows installations to interactively set, change, and view accounts and quotas for disk space use at the application level, eliminating the need for tedious analysis of out-of-date DASD reports.
- Space accounts for each application. SCC/DLIMIT uses the same flexible rules language as the other members of the Storage Control Center to assign datasets to accounts based on name, SMS class, or other criteria. Datasets may be assigned to multiple accounts, allowing usage to be tracked at the user, application, or departmental level.
- High Water marks and space statistics. SCC/ DLIMIT keeps track of the current space used within an account, the highest amount used, the maximum allowable amount, and other important information in real time. The SCC rules language allows warnings to be issued for accounts which exceed their limit, or if desired, new allocations for over-budget accounts can be prevented.
- ISPF Interface. An easy-to-use ISPF interface allows users to view their account status interactively, and allows storage administrators to easily set or change account criteria.
To view an online presentation of SCC DLimit, click here
Assists in the Management of DASD Costs
- Provides accounting for storage space
- Budgets and regulates DASD utilization
- Prevents unlimited growth
Versatile and Interactive
- Provides current view of storage space
- Set, change & view accounts interactively
- Eliminates tedious analysis
Provides Comprehensive Accounting/Monitoring
- Current space used within an account
- Highest amount used
- Maximum allowable amount
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When DTS software started designing DLimit to create a storage quota product, the developers seriously considered using RACF as the database for the DLimit account records. In fact, this was probably not an original idea – we heard rumors via the IBM retiree grapevine that IBM considered doing the same thing with the original version of RACF.
Two issues prevented RACF from being used for the database:
- Not all companies use RACF. In fact, many of the larger organizations still use ACF2.
- DLimit is a storage administrator’s tool. A security group would probably not be very receptive to the idea of DLimit radically expanding the RACF Database.
After realizing that DLimit would require a dedicated database for the account records, DTS modeled the I/O design after RACF to allow for high-performance multi-system updates to the database.
DLimit was first released in 1995.