Add memory requirement to DNA alignment (resolves #278)

resolves #278

Author: arkal

src/protect/alignment/dna.py

@@ -65,25 +65,35 @@ def align_dna(job, fastqs, sample_type, univ_options, bwa_options):
                  +- '<sample_type>_fix_pg_sorted.bam.bai': fsID
     :rtype: dict
     """
+    # The mkdup and regroup steps use picard that allots heap space using the Xmx key in the
+    # univ_options dictionary. This should reflect in the job allotment. Since We want all these
+    # jobs to occur on the same node, we ened to give them all the same memory requirements.
+
     bwa = job.wrapJobFn(run_bwa, fastqs, sample_type, univ_options, bwa_options,
                         disk=PromisedRequirement(bwa_disk, fastqs, bwa_options['index']),
+                        memory=univ_options['java_Xmx'],
                         cores=bwa_options['n'])
     sam2bam = job.wrapJobFn(bam_conversion, bwa.rv(), sample_type, univ_options,
                             bwa_options['samtools'],
-                            disk=PromisedRequirement(sam2bam_disk, bwa.rv()))
+                            disk=PromisedRequirement(sam2bam_disk, bwa.rv()),
+                            memory=univ_options['java_Xmx'])
     # reheader takes the same disk as sam2bam so we can serialize this on the same worker.
     reheader = job.wrapJobFn(fix_bam_header, sam2bam.rv(), sample_type, univ_options,
                              bwa_options['samtools'],
-                             disk=PromisedRequirement(sam2bam_disk, bwa.rv()))
+                             disk=PromisedRequirement(sam2bam_disk, bwa.rv()),
+                             memory=univ_options['java_Xmx'])
     regroup = job.wrapJobFn(add_readgroups, reheader.rv(), sample_type, univ_options,
                             bwa_options['picard'],
-                            disk=PromisedRequirement(regroup_disk, reheader.rv()))
+                            disk=PromisedRequirement(regroup_disk, reheader.rv()),
+                            memory=univ_options['java_Xmx'])
     mkdup = job.wrapJobFn(mark_duplicates, regroup.rv(), sample_type, univ_options,
                           bwa_options['picard'],
-                          disk=PromisedRequirement(mkdup_disk, regroup.rv()))
+                          disk=PromisedRequirement(mkdup_disk, regroup.rv()),
+                          memory=univ_options['java_Xmx'])
     index = job.wrapJobFn(index_bamfile, mkdup.rv(), sample_type, univ_options,
                           bwa_options['samtools'], sample_info='fix_pg_sorted',
-                          disk=PromisedRequirement(index_disk, mkdup.rv()))
+                          disk=PromisedRequirement(index_disk, mkdup.rv()),
+                          memory=univ_options['java_Xmx'])
     job.addChild(bwa)
     bwa.addChild(sam2bam)
     sam2bam.addChild(reheader)