Updated to remove all outdated node names, software versions etc

Author: dgtim

triton/overview.rst

@@ -10,13 +10,6 @@ project <http://sci.aalto.fi/en/research/muu_tutkimustoiminta/science-it/>`__,
 which was founded in 2009 to facilitate the HPC Infrastructure in all of
 School of Science. It is now available to all Aalto researchers.
 
-As of 2016, Triton is part of `FGCI - Finnish Grid and Cloud
-Infrastructure <https://www.csc.fi/-/fgci>`__ (predecessor of `Finnish
-Grid
-Infrastructure <http://www.csc.fi/tutkimus/Laskentapalvelut/gridymparisto/fgi>`__).
-Through the national grid and cloud infrastructure, Triton also becomes
-part of the European Grid Infrastructure.
-
 Hardware
 --------
 
@@ -30,37 +23,30 @@ ip-address.
 Networking
 ----------
 
-The cluster has two internal networks: Infiniband for MPI and Lustre
-filesystem and Gigabit Ethernet for everything else like NFS ``/home``
-directories and ssh.
+Internally the cluster uses Infiniband for MPI and Lustre and NFS.
 
 The internal networks are unaccessible from outside. Only the login node
 ``triton.aalto.fi`` has an extra Ethernet connection to outside.
 
 High performance InfiniBand has fat-tree configuration in general. Triton
 has several InfiniBand segments (often called islands) distinguished based
-on the CPU arch. The nodes within those islands connected with different
-ratio like 2:1, 4:1 or 8:1, (i.e. in 4:1 case for each 4
-downlinks there is 1 uplink to spine switches. The islands are
-``ivb[1-45]`` 540 cores, ``pe[3-91]`` 2152 cores
-(keep in mind that ``pe[83-91]`` have 28 cores per node), four ``c[xxx-xxx]`` segments
-with 600 cores each, skl[1-48] and csl[1-48] with 1920 cores each [CHECKME]. Uplinks from
+on the CPU arch. Uplinks from
 those islands are mainly used for Lustre communication.
 Running MPI jobs possible on the entire island or its segment, but not
 across the cluster.
 
-Disk arrays
------------
+Storgage
+--------
 
 All compute nodes and front-end are connected to a `ClusterStor storage
 system <usage/lustre>`:
 large disk arrays with the Lustre filesystem on top of it cross-mounted
 under ``/scratch`` directory. The system provides about 5PB of disk
 space available to end-user.
 
-Software
---------
+System software
+---------------
 
-The cluster is running open source software infrastructure: CentOS 7,
+The cluster is running open source software infrastructure: Red Hat Enterprise Linux
 with SLURM as the scheduler and batch system.