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--- doku:job_chains [2014/06/03 13:18] – ir
+++ doku:job_chains [2021/05/13 17:45] (current) – removed goldenberg
@@ Line 1: / Line 1: @@
-====== Job chains ======
-Job chains are sets of consecutive **interdependent** jobs.
-There are several ways how to create job chains and we will discuss three different solutions below:
-==== Solution I =====
-Create one single job script and list several different jobs inside it. E.g.:
-<code>
-user@l01 $ cat allInOne.sge
-#$ -N allInOne
-./doJob1
-./doJob2
-./doJob3
-</code>
-<code>
-user@l01 $ qsub allInOne.sge
-Your job 10411 ("allInOne") has been submitted.
-</code>
-==== Solution II ====
-In order to realize interdependencies of submitted jobs, qsub allows for the following options
-*[-hold_jid job_identifier_list]          define jobnet interdependencies
-*[-hold_jid_ad job_identifier_list]       define jobnet array interdependencies
--hold_jid <job id|job name>.
-<code>
-user@l01 $ cat holdJob.sge
-#$ -N holdJob
-./doJob1
-</code>
-<code>
-user@l01 $ cat Job2.sge
-#$ -N Job2
-#$ -hold_jid holdJob
-./doJob2
-</code>
-...
-<code>
-user@l01 $ qsub holdJob.sge
-Your job 10451 ("holdJob") has been submitted.
-user@l01 $ qsub Job2.sge
-Your job 10452 ("Job2") has been submitted.
-user@l01 $ qsub Job3.sge
-Your job 10453 ("Job3") has been submitted.
-</code>
-'Job2' waits and starts only after 'holdJob' has finished. If you have another 'Job3' it waits until 'Job2' has finished and so on ... .
-   *Advantage: accumulates ”waiting time”
-   *Note: -hold_jid <job_name> can only be used to reference jobs of the same user (-hold_jid <job_id> can be used to reference any job)