what is an SDSF?

Sdsf stands for system display and search facility.SDSF provides a powerful and secure way to monitor, manage and control your z/os sysplex. Its easy-to-use interface lets you control
jobs and output
devices, such as printers, readers, lines, and spool offloaders
checks from ibm health checker for z/os
system resources, such as wlm scheduling environments, the members of your jes2 mas, and jes2 job classes system log and action messages

it is a system diagnostic facility..
when u submit a job, u can immediately view the status of the job through this command..