How to handle this issue?

[dongyingying]

When I design a sequence to run two jobs,every job's source have two files and the jobs have no links and need to run parallel ,so i need to loops and nest condition and sequencer . so who can tell me how can i do it? thank you .

[HendrikB]

I am not sure if I got your requirements right, just an idea ...

Put the the two jobs in a separate Sequence without any links to make them run in parallel.
Then run this Sequence in a loop out of another one ...

[ray.wurlod]

...so i need to loops and nest condition and sequencer

No you don't. You can create two parallel streams of processing independently in the one sequence.

[qt_ky]

Depending on how you setup a loop, the jobs you are calling may no longer run in parallel. For example, iteration1 calls job1 on file1 in parallel with job2 on file2. Iteration2 calls job1 again but on file3 in parallel with job2 again but on file4. Iterations 1 and 2 will run sequentially. There are alternatives, such as using multi-instance jobs or file-patterns, depending on what you need.