JES2 can perform the following types of starts: This start occurs when you specify  PARM=COLD  when JES2 is started. The JES2 spool is  cleared of all contents. This type of start requires that all the members of the MAS are  stopped.  Note:  On the system that is performing the cold start, you must take one of the  following actions: Given that all work on the system must be stopped before this start is performed, little  difference exists between stopping and restarting JES2 to perform the cold start and  IPLing that system. This start occurs when you specify  PARM=WARM  when JES2 is started and the starting JES2  member is joining a MAS with other active members. The JES2 checkpoint is read in and  processed. Any work that might be associated with this member from a previous instance  is reset (marked as no longer actively being processed). This start occurs when you specify  PARM=WARM  when JES2 is started. This process is the  same as a warm start except that no work is associated with this member from a previous  instance. This process occurs if the member: This start occurs when you specify  PARM=WARM  when JES2 is started and the starting  member is the first (only) active member of the MAS. As with all other warm starts, the  checkpoint is read in and processed. If any entry in the work queue indicates it is active, it  is reset then. In addition, certain operating parameters can be reset only on this type of  start. This start occurs when you specify  PARM=WARM  when JES2 is started and a previous  instance of the JES2 address space had ABENDed and no intervening IPL occurred. As  with all other warm starts, the checkpoint is read in and processed.  Work in the job queue that is associated with processes that were ended when the JES2  address space was ABENDed are reset. However, work that is associated with active  address spaces (running jobs, internal readers, and so on) is not reset. That work  continues normal processing. Note:  When working with a secondary subsystem, all start options are available and  affect only the secondary subsystem without any effect on the primary JES2  subsystem. 18  A Guide to JES3 to JES2 Migration GLYPH<SM590000> Hot start GLYPH<SM590000> Warm start (MAS-wide) – Was shut down cleanly by using a  $P JES2  command – Is starting after an all-member warm or cold start – Had its work reset by using a  $E MEMBER  command or through the  AUTOEMEM  process GLYPH<SM590000> Quick start (single system) GLYPH<SM590000> Warm start (single system) GLYPH<SM590000> Completely stop JES2 and then restart it and specify that it performs a cold start. GLYPH<SM590000> Perform an IPL. GLYPH<SM590000> Cold start