[mpich-discuss] aggregator in collective I/O

Hi, How can I know the aggregator's rank in the collective I/O? I also feel difficult to distinguish the aggregator and non-aggregator in the ad_read_coll.c, for example, in function ADIOI_R_Exchange_data, how can I know it is executed by a process or an aggregator? I can only see how 'nprocs_for_coll' is used in partitioning the file domain, but couldn't see how it is used to tell the certain number of aggregator to do the collective I/O. Thanks, Jialin _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss