Difference between revisions of "File systems and data structure at ECMWF - where to store and get data!"
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''Updated by nik: 12 March 2013'' | ''Updated by nik: 12 March 2013'' |
Revision as of 11:23, 4 April 2014
Back to ECMWF overview
Updated by nik: 12 March 2013
A good overview of the Computing services is given here:
http://www.ecmwf.int/services/computing/
ECgate
is a Unix server (soon to be changed to a Linux server) where each user has directories:
- HOME: Small permanent files, daily backup/snapshot. Quota: 3.6 GB. To check quota: ecquota - SCRATCH: Temporary data, removed regularly. Quota: 100 GB - SCRATCHDIR: Files are autodeleted after end of job. Part of SCRATCH and quota.
HPCF
(High performance computing facility) is the supercomputer (c2a) where each user has directories:
- HOME: Small permanent files, daily backup/snapshot. Quota: 320 MB. To check quota: quota - SCRATCH: Temporary data, removed regularly. Quota: 25 TB. - SCRATCHDIR: Autodeled after end of job. - PERM: Large permanent files, no backup. Quota: 26 GB. Accessible from ECgate as /c2a/perm
The two systems use the same name convension - but different file systems.
Accsessing ECGATE from HPCF
If you need to access data on ECGATE from the HPCF you can find them in /ws/$HOME
On both ECgate and HPCF you can access 2 different archives.
1) MARS (Meteorological Archival and Retrieval System)
which contains the meteorological forecast/analysis/re-analysis data in GRIB format, as well as observation data in BUFR format.
2) ECFS (ECMWF File storage system):
This is a User Archive where you can store any long-term data on tape.
On ECFS you have two domains:
- ec: Permanent domain where files are stored indefinitively. - ectmp: temporary domain where files are stored for 90 days after which they are automatically deleted (and cannot be recovered).
To store/access files in ECFS you must issue explicit commands which are set-up to use a UNIX like interface.
Commands are same as for unix but starting with "e":
els, ecd, ecat, ecp, epwd, emv, echmod...
For a manual of the commands type "man els".
els lists your data under ec: ls lists your data under $HOME (on ECgate or HPCF dependent on where you are logged in)