New in v4
New features in v4 described here.
Aggregator can automatically adjust to collection rate changes through update hint in the metadata.
More control over set access through munge-based per set permissions.
LDMS Metric Set meta data includes metric set update hint and munge-based permissions.
Metric sets seen based on permissions via munge: root (top) sees more than user (bottom).
More control over set Collection and Aggregation through:
- Vector of sets - A sampler can collect multiple sets (e.g., vector of sets). This includes storing the same set for multiple timestamps (e.g., for high frequency collection).
- Metric Set Groups - Single RDMA push/pull of multiple disparate sets (e.g., could be meminfo and vmstat). This also supports pulling a vector of sets, so that sets can be aggregated at lower frequency than collection, without losing any data.
- Cray dvs
- Slurm job id - single user per node (currently)