Breniac hardware¶
Breniac is the VSC’s Tier-1 cluster hosted by KU Leuven.
Breniac login infrastructure¶
Direct login using SSH is possible to all login infrastructure.
Note
Only users involced in an active Tier-1 project have access to the infrastructure.
Two types of login nodes are available:
a classic login node, i.e., SSH access.
login1-tier1.hpc.kuleuven.be
login2-tier1.hpc.kuleuven.be
a login node that provides a desktop environment that can be used for, e.g., visualization, see the NX clients section:
nx-tier1.hpc.kuleuven.be
Warning
This node should not be accessed using terminal SSH, it serves only as a gateway to the actual login nodes your NX sessions will be running on.
The NX login node will start a session on a login node that has a GPU, i.e.,
login2-tier1.hpc.kuleuven.be
.
Hardware details¶
408 skylake nodes
2 Xeon Gold 6132 CPU@2.6GHz, 14 cores each
192 GB RAM (memory bandwith and latency measurements)
75 GB SSD local disk
specific
qsub
options apply
436 broadwell nodes
2 Xeon E5-2680v4 CPUs@2.4GHz, 14 cores each
128 GB RAM (memory bandwith and latency measurements)
75 GB SSD local disk
specific
qsub
options apply
144 broadwell nodes
2 Xeon E5-2680v4 CPUs@2.4GHz, 14 cores each
256 GB RAM
75 GB SSD local disk
specific
qsub
options apply
The nodes are connected using an Infiniband EDR network.
Breniac storage¶
Your $VSC_HOME
and $VSC_DATA
directory are mounted on the Breniac
login and compute nodes. See your VSC institute’s information on local
storage about policies and quota. Also check the VSC storage
guidelines for information on what to store where.
Note
$VSC_HOME
and $VSC_DATA
are mounted using NFS, so they can not
be used for parallel I/O. If your software benefits from using a
parallel file system, please use $VSC_SCRATCH
.
Variable |
Type |
Access |
Backup |
Default quota |
---|---|---|---|---|
$VSC_SCRATCH $VSC_SCRATCH_SITE |
GPFS |
breniac |
NO |
1 TB |
$VSC_SCRATCH_NODE |
ext4 |
breniac, job only |
NO |
75 GB |
The path names given below should be adapted to reflect your home institution and VSC account number.
Variable |
Name |
---|---|
$VSC_HOME |
/user/leuven/30X/vsc30XYZ |
$VSC_DATA |
/data/leuven/30X/vsc30XYZ |
$VSC_SCRATCH $VSC_SCRATCH_SITE |
/scratch/leuven/30X/vsc30XYZ |
$VSC_SCRATCH_NODE |
/local_scratch |