发明名称 |
MULTIPLE ENHANCED CATALOG SHARING (ECS) CACHE STRUCTURE FOR SHARING CATALOGS IN A MULTIPROCESSOR SYSTEM |
摘要 |
Various method and system embodiments for facilitating catalog sharing in multiprocessor systems use multiple ECS cache structures to which catalogs are assigned based on an attribute such as SMS storage class or a high level qualifier (HLQ) (e.g. an N-to-1 mapping) or each individual catalog (e.g. a 1-to-1 mapping). When maintenance is performed on an ECS shared catalog, the multiple ECS cache structure requires only those catalogs associated with a particular ECS cache structure be disconnected. Any catalogs in the structure that are not involved in or affected by the maintenance may be temporarily or permanently moved to a different ECS cache structure. As a result, VVDS sharing is only required for those catalogs on which maintenance is being performed or that remain associated with that ECS cache structure during maintenance. This reduces I/O activity to the DASD, and results in a significant overall performance improvement.
|
申请公布号 |
US2013275670(A1) |
申请公布日期 |
2013.10.17 |
申请号 |
US201213448884 |
申请日期 |
2012.04.17 |
申请人 |
HARRIS ERIC J.;MCCUNE FRANKLIN EMMERT;REED DAVID CHARLES;SMITH MAX DOUGLAS;INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
HARRIS ERIC J.;MCCUNE FRANKLIN EMMERT;REED DAVID CHARLES;SMITH MAX DOUGLAS |
分类号 |
G06F12/08 |
主分类号 |
G06F12/08 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|