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## What's New

### Major Updates in SLURM Version 0.4

SLURM Version 0.4 became available in January 2005. Major enhancements included:

- Support for Load Sharing Facility (LSF)
- Add support for MPICH-GM (Myricom's version of MPI).
- Support for the IBM AIX operating system.
- Support for the IBM IBM BlueGene system.
- Support for dependent jobs.
- Support for job account numbers.
- Add "reason" field to show what pending jobs are waiting for.
- New graphical user interface, smap.

### Major Updates in SLURM Version 0.5

SLURM Version 0.5 became available in July 2005. Major enhancements included:

- Moved slurm process tracking options to plugin (ProctrackType).
- Support for the IBM Federation switch.
- Manage consumable resources
- Perform job accounting (record resource utilization).
- Added BlueGene bglblock freeing tool, sfree.
- Added AIX checkpoint plugin (CheckpointType).

### Major Updates in SLURM Version 0.6

SLURM Version 0.6 became available in September 2005. Major enhancements include:

- Support for Infiniband
- Support for configurable resource limit propagation.
- MPI support moved into plugin (substantive configuration changes required for MPICH-GM).
- Srun options can be specified in job script (#SLURM ...)
- Names (not just numbers) for job step identifcation.

### Major Updates in SLURM Version 1.0

We expect to make SLURM Version 1.0 available in January 2006. Major enhancements include:

- I/O streams for all tasks on a node are transmitted through one pair of sockets instead of distinct sockets for each task. This improves performance and scalability.
- Nodes can be in multiple partitions, providing more flexibility in managing the SLURM partitions as queues.
- Support for task communication/synchronization primitives (PMI).
- E-mail notification on job state changes.
- Better control over task distribution.
- Configuration Tool

### Major Updates in SLURM Version 1.1 and beyond

Detailed plans for release dates and contents of future SLURM releases have not been finalized. Anyone desiring to perform SLURM development should notify slurm-dev@lists.llnl.gov to coordinate activies. Future development plans includes:

- Permit resource allocations (jobs) to change size.
- Preempt/resume jobs per scheduler directives.
- Enforce CPU and memory limits by job.
- Convert state save functions to plugins for use of various databases.
- Develop Perl API to SLURM.
- Add Kerberos credential support including credential forwarding and refresh.

For information about this page, contact slurm-dev@lists.llnl.gov.