Computer Associates BABNWUP900NE6 Clients Agents Guide - Page 14

Agent Features Multistreaming for Windows, UNIX, Mainframe Linux, and Linux If you have more than one drive and more than one volume to be backed up, you can configure that system's client agent to use multistreaming. With multistreaming, you can take advantage of all available tape devices on the system. Multistreaming works by splitting a single backup job into multiple jobs that use all tape drives. As a result, multistreaming increases the overall backup throughput compared with single-stream, sequential processing. On a Windows server, multistreaming is performed at the volume level for regular file systems (two volumes can run simultaneously on two separate devices). For preferred shared folders, remote database servers, and Windows NT, 2000, or XP agents, multistreaming is performed at the node level. On a UNIX or Linux server, you can configure the multistreaming level. You can have only as many jobs running simultaneously as the number of local and remote devices or groups on the system. With multistreaming, one master job is created, which triggers slave jobs for as many volumes as necessary. When a job is finished on one device, another job is executed until there are no more jobs to run. For more information on multistreaming, see the Administrator Guide. Multiplexing Note: This feature does not apply to BrightStor ARCserve Backup for Mainframe Linux. Multiplexing is a process in which data from multiple sources is written to the same media simultaneously. When a job that has multiple sources is submitted with the multiplexing option enabled, it is broken into child jobs- one for each source. These child jobs write data to the same media simultaneously. For more information on multiplexing, see the Administrator Guide. 14 Client Agents Guide