The DIRAC1 cluster is part of the LBNL Supercluster and shares the same Supercluster infrastructure. This includes the system management software, software module farm, scheduler, storage and backend network management.
Login and Data Transfer:
- Login server: lrc-login.lbl.gov
- DATA transfer server: lrc-xfer.lbl.gov
- Globus Online endpoint: lbnl#lrc
DIRAC1 has a mixture of different type of hardware. Compute nodes are connected with each other through a high-performance Mellanox 56Gbps FDR switch.
|dirac1||56||n0[000-055].dirac1||INTEL XEON E5-2670 v3||24||256GB|
|dirac1||72||n0[056-127].dirac1||INTEL XEON E5-2650 v4||24||256GB|
Storage and Backup:
DIRAC1 cluster users are entitled to access the following storage systems so please get familiar with them.
|HOME||/global/home/users/$USER||12GB||Yes||Per User||HOME directory for permanent data
|GROUP-SW||/global/home/groups-sw/$GROUP||200GB||Yes||Per Group||GROUP directory for software and
data sharing with backup
|GROUP||/global/home/groups/$GROUP||400GB||No||Per Group||GROUP directory for data sharing
|SCRATCH||/global/scratch/$USER||none||No||Per User||SCRATCH directory with Lustre high
performance parallel file system
|CLUSTERFS||/clusterfs/dirac1/$USER||none||No||Per User||Private storage|
NOTE: HOME, GROUP, GROUP-SW and CLUSTERFS directories are located on a highly reliable enterprise level BlueArc storage device. Since this appliance also provides storage for many other mission critical file systems, and it is not designed for high performance applications, running large I/O dependent jobs on these file systems could greatly degrade the performance of all the file systems that are hosted on this device and affect hundreds of users, thus this behavior is explicitly prohibited. HPCS reserves the right to kill these jobs without notification once discovered. Jobs that have I/O requirement should use the SCRATCH file system which is designed specifically for that purpose.
DIRAC1 cluster uses SLURM as the scheduler to manage jobs on the cluster. To use the DIRAC1 resource the partition “dirac1” must be used (“–partition=dirac1”) along with account “dirac1” (“–account=dirac1”). A standard fair-share policy with a decay half life value of 14 days (2 weeks) is enforced. For users from ac_ciftgp (Guggenheim Users), the default QOS is dirac1_normal. This is the high priority QOS which will preempt low priority jobs if those jobs need resources. For users from ac_cifgres, the default QOS is dirac1_lowprio. This is the low priority QOS. When system is busy and there are higher priority jobs pending, scheduler will preempt jobs that are running with this low priority QOS. “dirac1_highprio” is a special QoS which will preempt both dirac1_lowprio and dirac1_normal.
|PARTITION||ACCOUNT||NODES||NODE LIST||NODE FEATURES||SHARED||QOS||QOS LIMIT|
DIRAC1 uses Software Module Farm Environment Modules to manage the cluster wide software installation.
Please visit here for the live status of DIRAC1 cluster.