更新 'defaults'

defaults

@@ -4,5 +4,5 @@
     "ANNOTATION_GTF":"oss://pgx-result/chenqingwang/arriba/GENCODE37.gtf",
     "disk_size":"200",
     "arriba_docker":"registry.cn-shanghai.aliyuncs.com/pgx-docker-registry/arriba:2.1.0",
-    "arriba_cluster":"OnDemand bcs.ps.c.8xlarge img-ubuntu-vpc"
+    "arriba_cluster":"OnDemand bcs.ps.c.6xlarge img-ubuntu-vpc"
 }