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bbcp will not copy soft links, so if you are copying an entire directory structure that contains them, you may need to copy them over at a second stage with another tool like rsync. |
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Fetching data from ECMWF to your computer
Transferring a directory tree between the Atos HPCF and your computer with rsync
This is the recommended and most versatile option. You may initiate the transfer from your computer for the standard set of filesystems:
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user@yourlaptop:~> rsync -avz hpc-login:/scratch/user/mydataset . |
This command can be run multiple times, since only new or modified files will be transferred.
| Tip |
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You may add the |
Transferring a directory tree between the Atos HPCF and your computer with scp
You may initiate the transfer from your computer:
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user@yourlaptop:~> scp hpc-login:/scratch/user/myfile . |
Note that running the command multiple times will always overwrite the file on destination.
Transferring a directory tree between the Atos HPCF and your computer with sftp
You may initiate the transfer from your computer:
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user@yourlaptop:~> sftp hpc-login
sftp> cd /scratch/user
sftp> get myfile |
Note that running the command multiple times will always overwrite the file on destination.
Pushing data from ECMWF to external sites
There are various methods for transferring files from ECMWF to remote sites. Which is best suited for your requirements depends on the configuration of the remote system. If you are not sure what it is, please ask your Computing Representative or system administrator.
In general you have the following options:
ectrans
The ectrans command, part of the ECaccess framework, allows files to be transferred securely and unattended, as it does not require a password to be specified for the remote host: the ECaccess gateway performs the security checking. Ideally, an ECaccess gateway should be installed at the remote site to which you want to transfer; if there is no remote site ECaccess gateway, you can use ectrans via the ECMWF gateway (ecaccess.ecmwf.int), provided that the destination site is accessible from the ECMWF gateway via (s)ftp.
Before you can make use of ectrans, you need to declare an ECtrans association (msuser) for the storage/retrieval of the remote file. This can be done either with the ECaccess tool ecaccess-association-put or through the ECaccess web interface of the gateway you want to transfer to (or at http://ecaccess.ecmwf.int , if no gateway is installed at the remote site). For every msuser declaration, the hostname and the login username and password are requested and stored on the gateway in encrypted form. After these preliminaries you should be able to use ectrans as described in its help page:
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usage: ectrans [-gateway name] -remote msuser@[destination] \
[-get|-put] -source [ec:|ectmp:]filename [args ...] (*)
ectrans -check requestID (*)
-gateway {arg} - access gateway name (default (**): ecaccess.ecmwf.int)
-remote {arg} - access method (default (**): *none*)
-source {arg} - source file name
-target {arg} - target file name (default: same as -source)
-mailto {arg} - target email address (default: current user)
-lifetime {arg} - lifetime of the file in the spool (default: 1w) (***) (****)
-delay {arg} - transmission delay (default: immediate transfer) (***) (****)
-at {arg} - transmission date (default: immediate transfer) (****)
-format {arg} - define the date format as used with -at (default: yyyyMMddHHmmss)
-retryCnt {arg} - define the number of retries (default: async=144, sync=0)
-retryFrq {arg} - define the frequency of retries (default: async=10m, sync=1m) (***)
-maxTime {arg} - define the maximum transfer duration (default: 12h) (***)
-priority {arg} - transmission priority 0-99 (default: 99) (****)
-put - interactive/synchronous transfer (no spool)
-get - interactive/synchronous pull (rather than push) file
-onsuccess - mail sent on successful transfer
-onfailure - mail sent when transfer has failed
-onretry - mail sent when transfer is retried
-keep - keep the request in the spool till expiration (****) (*****)
-remove - always remove the request from the spool (****) (*****)
-reject - if existing target file (default)
-append - if existing target file
-resume - if existing target file
-overwrite - if existing target file
-verbose - verbose mode on
-version - print version number
-help - this message
(*) If successful, a requestID is returned, which can be used in
check requests. Exit code is 0 on success and >0 otherwise.
(**) The default values depend on the GATEWAY or REMOTE environment
variables.
(***) Duration in weeks, days, hours, minutes or seconds (e.g. 1w|2d).
(****) These options are only relevant when the spool is used. The spool
is no used during interactive transfers (-get and -put options).
(*****) By default, successful requests are removed from the spool and
failed requests are kept in the spool till expiration. |
Ectrans can be regarded as an extended ftp, which offers e.g. direct access to ECFS files, restart facility for failed transfers etc. For more details please refer to the ECaccess documentation or reach us via the ECMWF Support Portal.
rsync/sftp/scp
The most popular SSH-based transfer commands such as rsync, sftp and scp are fully supported as part of SSH to directly connect to remote sites via the Internet. No proxies are needed, but the only supported remote ports are 22, the standard for SSH and non-standard 2222.
ftp and lftp
FTP (File Transfer Protocol) can be used without a proxy to connect to remote servers on the standard port, 21, and non-standard 2121. You may use the ftp classic client, or the lftp loading the appropriate module:
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module load lftp lftp yourftpserver |
When transferring data, make sure you are using the right transfer type (binary/ASCII). Attempting to transfer a binary file as ASCII will result in a corrupted binary file.
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ftp.ecmwf.int serviceThere is no connectivity from Atos HPCF to the ftp.ecmwf.int service in Reading. The new ftp service in Bologna is now available. See FTP Service - Internal users to provide files for external access. |
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