USS Backstore allows a Triplex copy of a Virtual Volume to be written to or read from USS files instead of Backstore Tapes. The Network File System (NFS) is the intended file system for the Triplex copy but HFS and zFS file systems work as well.
The Triplex copy can be the only copy or it can be combined with Primary and Duplex copies to allow for up to three copies of a Virtual Volume. When specified alone, the Triplex copy allows an installation to become tapeless for a given Backstore Group. Any NFS server supported by z/OS can be used. CA Vtape does not provide replication or data de-duplication directly but can exploit these features if provided by the NFS server.
The NFS servers can be located locally or in a cold Disaster Recovery (DR) site. When the NFS servers offer replication we recommend one be located as close to the z/OS host as possible and the other in the DR site. If the NFS servers also offer data de-duplication then only unique data is sent across the wide area network decreasing network bandwidth requirements and shortening the synchronization window for when the data is available at the DR site.
|
Copyright © 2013 CA Technologies.
All rights reserved.
|
|