Changes between Version 21 and Version 22 of Public/User_Guide/Batch_system

Timestamp:

Jan 10, 2020, 6:07:13 PM (4 years ago)

Author:

Jacopo de Amicis

Comment:

Added further details about gateway jobs.

Public/User_Guide/Batch_system

@@ -198 +198 @@
 === Heterogeneous jobs with MPI communication across modules ===
 
-In order to establish MPI communication across modules using different interconnect technologies, some special Gateway nodes must be used. A general description of how the user can request and use gateway nodes is provided at [https://apps.fz-juelich.de/jsc/hps/jureca/modular-jobs.html#mpi-traffic-across-modules this section] of the JURECA documentation.
+In order to establish MPI communication across modules using different interconnect technologies, some special Gateway nodes must be used. On the DEEP-EST system, MPI communication across gateways is needed only between Infiniband and Extoll interconnects.
+
+**Attention:** During the first part of 2020, only the DAM nodes will have Extoll interconnect, while the CM and the ESB nodes will be connected via Infiniband. This will change later during the course of the project (expected Summer 2020), when the ESB will be equipped with Extoll connectivity (Infiniband, which will be removed from the ESB and left only for the CM).
+
+A general description of how the user can request and use gateway nodes is provided at [https://apps.fz-juelich.de/jsc/hps/jureca/modular-jobs.html#mpi-traffic-across-modules this section] of the JURECA documentation.
 
 **Attention:** some information provided on the JURECA documentation do not apply for the DEEP system. In particular: