Always running DS job

mydsworld · Post by **mydsworld** » Thu Apr 17, 2008 8:02 am

If a DS job (sequence) is created with 'Wait for File' activity stage timeout set to 'Do not timeout', then isn't that a 'always running' job until it finds a file.In such case is it going to affect the system performance.

kcbland · Post by **kcbland** » Thu Apr 17, 2008 8:11 am

No, and you can easily measure job system impact using prstat, topas, glance, top, or any other monitoring tool. The wait-for-file API can be read about in the DS BASIC manual.

chulett · Post by **chulett** » Thu Apr 17, 2008 8:12 am

Yes, it will run until it finds a file or dies. There shouldn't be any hit to much other than your filesystem, which will be polled every... four seconds(?), I believe, for the file.

mydsworld · Post by **mydsworld** » Fri May 16, 2008 10:21 am

Which one is better option in terms of performance :

1. Polling through Cron and calling a DS job
2. Using 'Wait for File' activity to poll.

Thanks.

ArndW · Post by **ArndW** » Fri May 16, 2008 10:29 am

Option 2 will use less resources for the same polling period.