CentOS7 Login, Sci and Xfer servers

This article describes briefly the new CentOS7 versions of the 3 familiar types of JASMIN server which have now been made available for users to test.  It will be updated regularly as further progress is made as part of the CentOS7 migration plan. There are now: 

  • CentOS7 Login servers
  • CentOS7 Scientific analysis (sci) servers
  • CentOS7 Data transfer (xfer) servers 

Login servers

The new CentOS7 login (bastion or gateway) servers are available to access resources within JASMIN (CentOS7). Users with the  jasmin-login access role can access the following servers using SSH:

Table 1: Centos7 Login servers

Login server name    
login1.jasmin.ac.uk   
login4.jasmin.ac.uk


These servers are functionally the same as their  predecessors  jasmin-login1.ceda.ac.uk ,  cems-login1.cems.rl.ac.uk and can now be used as the default route into JASMIN. Note that additional servers in this series will follow in due course.
As before, these login servers provide a table displayed at login showing the list of available sci servers and their current load and number of logged-in users. Please make use of these to select the most appropriate sci server.

Further details of the login servers can be found here.

Scientific analysis servers

New CentOS7 Scientific analysis servers are now available (see  Table 2). These can be used by users with the jasmin-login access role to test workflows/tasks that:

  1. Use the new software environments
  2. Do not make use of the software /apps/contrib (which has only been tested for RHEL6 operating systems)
  3. Do not make use of the software available under the module environment (which has only been tested for RHEL6 operating systems) except the modules jaspy and jasmin-sci
  4. Do not need to be submitted as batch jobs (because the CentOS7 Sci cannot yet submit to the forthcoming SLURM scheduler, and are not able to use the (soon-to-be deprecated) LSF scheduler, which only manages RHEL6 LOTUS nodes.
  5. A job submitted to the new batch scheduler SLURM will run on a CentOS7 LOTUS sub-cluster 

Table 2: CentOS7 Scientific analysis servers


     Server name  
Virtual/Physical   (OperatingSystem)  Batch submission  Processor model  CPU Cores  RAM (GB) 
sci1.jasmin.ac.uk V (CentOS7)  - Xeon(R) Silver 4114 CPU @ 2.20GHz   8     16 
sci2.jasmin.ac.uk V (CentOS7)  - Xeon(R) E5-2630 @ 2.20GHz   8     16 
sci2-test.jasmin.ac.uk V (CentOS7)  SLURM Intel(R) Xeon(R) CPU E5-2630 v4 @ 2.20GHz  8    8
sci4.jasmin.ac.uk V (CentOS7)  SLURM Intel(R) Xeon(R) CPU E5-2630 v4 @ 2.20GHz 8 16
sci5.jasmin.ac.uk V (CentOS7)  SLURM Intel(R) Xeon(R) CPU E5-2630 v4 @ 2.20GHz 8 16

Further details of the sci servers can be found here.

Note: These new sci servers are only accessible from the new CentOS7 login nodes listed in Table 1.

Transfer servers

New CentOS7 transfer (xfer) servers are now available (see Table 3). These can be used by users with the  jasmin-login access role and are functionally the same as their predecessors.

Table 3: Centos7 xfer servers

Login server name    
xfer1.jasmin.ac.uk   
xfer2.jasmin.ac.uk

Further details of the xfer servers can be found here.

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