Datastage Questions

what is multiple instances?
how u trigger the job in windows?
how can u see,delete dataset in unix and windows?
what is the function of shared container?
why don't we use odd nodes to run the job?
what is the normal view and materialized view?
when do u use separate sort stage and inbuilt sort utility in a stage?what is the difference?
if a job is aborted?can v run the job with out compilation?
how do u commit the records while loading?
how to check the no. of nodes while running the job in UNIX?
a transformer stage is running in parallel?how can v run it in sequential?
a sequential file has 4 duplicate records?how to get 3rd one?
what r the stages can be used to identify the delta?
how can the server job be used in PX job?
how can u run the job in sequential mode?
how can batch file in DOS/Shell Script in UNIX be called in datastage?