Informatica 并行作业在 Teradata 上创建 mload 问题

Question

In the ETL there are 2 parallel jobs and those 2 jobs run start and finish almost at the same time. After they are finished they will update few details to a same look up table. Both the parallel jobs are taking the same amount of time to finish. If both the jobs are started at the same time then the jobs are creating a mlock on the look up table and both the jobs are failing. Tried releasing mlock and running them again. But that is still going into mlock again. So added a wait time of 20 secs before the 1st parallel job. Then both the parallel jobs finished with any issue and updated the required details to the look up table.

Adding a wait time is not an ideal solution in this use case, because later on few parallel jobs needs to added (somewhere around 20-30). If wait steps were to be added before each parallel job, then the time increases drastically. Because for the 2nd job 20 sec, 3rd job 40 sec, so on.. This will be a large number by the time 20th job is reached.

So looking for an alternative solution rather than adding a wait step before each job to avoid the MLock issue?

Answer 1

Be sure each job has its own distinct log, work, and error table names. If multiple jobs that potentially try to run in parallel use the same names (eg the default generated names), you are more likely to run into issues.

But if the update is only for a "few details" then MLOAD is the wrong tool.