wiki:News

News and Announcements

New CMS Helpdesk

On Thurs 1st July 2021 the NCAS-CMS Modelling Helpdesk will move to a new Discourse Forum available at https://cms-helpdesk.ncas.ac.uk (Note new URL).

The current helpdesk will then become read-only. Any active queries will be moved to the new system.

To raise a query (topic) you will need to sign up for an account at the above URL.

Please read the following “Welcome” post for further information:

https://cms-helpdesk.ncas.ac.uk/t/welcome-to-the-ncas-cms-modelling-support-forum/7

PUMA is back

PUMA was successfully rebooted and is now available for use again.

PUMA Down

PUMA has gone down. We've arranged for server room access tomorrow morning and will update users when we know more.

In addition we are unable to send to the PUMA mailing list as there appears to be a problem with the Reading mail server.

Apologies for any inconvenience.

HPC News (ARCHER, ARCHER2, and NEXCS)

  • ARCHER will end on Jan 27th - please note, this means no access whatsoever subsequently
  • NEXCS will now continue to late June - this represents a five month extension of the service in light of delays with ARCHER2

CMS Support over the Christmas Period

In line with university Christmas closure periods, the CMS team will be unavailable from 19th December 2020 until 4th January 2021.

We wish you all a Merry Christmas and Happy New Year.

Latest CF data tool releases with a new paper for cfdm

A set of new releases is now available of four of our CF data tool libraries. These versions are inter-compatible and we encourage users to upgrade to these latest and greatest libraries for new features and bug fixes:

Improvements made relative to previous versions can be viewed in the change logs, as linked above. Any further information and guidance is contained elsewhere in the respective documentation, including details on how to install the libraries:

Additionally, we are pleased to announce that a paper focusing on cfdm as a software library has just been published in the Journal of Open Source Software. The paper is open access and available to view here.

UM Version 11.7 released

The latest version of the UM, 11.7, is available on ARCHER. Those of you who are spending your last kAUs on this machine may wish to check it out and incorporate it into your suites.

Update: ARCHER Transition - Modifying PPTransfer

ARCHER has now been configured to allow outgoing connections from the post-processing nodes. This means that it is possible again to transfer data to JASMIN by pushing from ARCHER in the same way that we did from the RDF.

UM suites need to be modified to stage data for archiving on the /work disk and configured to run the pptransfer task in the ARCHER serial queue. You will also need to setup ssh-agent on both the post-processing nodes espp1 & espp2 to connect to JASMIN.

Full instructions on how to modify a UM suite can be found on our website

Update: ARCHER return to service - UM work flow

We continue to work with ARCHER to implement a robust solution to handle the 2FA access. Until we have that solution, this is a short-term alternative. In your PUMA or pumatest .ssh/config file (create one if you don't already have one), delete references to login.archer.ac.uk and then add:

Host login.archer.ac.uk
User <your ARCHER username>
IdentityFile ~/.ssh/<your private key to ARCHER>
ControlMaster auto
ControlPath /tmp/ssh-socket-%r@%h-%p
ControlPersist yes

Login to ARCHER (with passphrase and password).

Rose/Cylc suites should not use rose host-select - it will not work; suites must specify login.archer.ac.uk in the appropriate .rc file (suite.rc or archer.rc), for example, host = login.archer.ac.uk

Submit UMUI and Rose/Cylc jobs as usual.

The connection to ARCHER will persist after logging out of PUMA/pumatest and will enable the Cylc engine to manage your suite. However, the connection will be terminated (each day at ~5AM in our experience) - logging in to ARCHER will re-establish the connection and Rose/Cylc suites will pick up automatically. If a suite times out (over a weekend possibly), a normal rose suite-restart should get it going again.

ARCHER return to service - UM work flow

When ARCHER returns to operation on May 21st all users will be required to use two credentials to access the service: an SSH key with a passphrase and their ARCHER password.

Rose/Cylc suites and UMUI jobs will not run under this HPC access model. We are working closely with ARCHER to develop and implement a solution that will enable UM work flows to function with the new security scheme.

Last modified 6 years ago Last modified on 02/10/15 16:20:56