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Elastic Tape command-line interface hints
Elastic Tape command-line interface hints
This article explains the return codes of certain Elastic Tape (ET) commands.
et_put.py
Command-line tool to register large numbers of files for upload to Elastic Tape
Return codes
rc 0: normal exit
rc 1: error in start up parameters
rc 2: error processing listWhen writing data to the ET system, it is very important that data remains in place on disk, in the location where ET expects to find them, until the status of the batch in question has reached CACHED_SYNCED or SYNCED. This means that the data have actually been written to tape, but is not the case until that status is shown.
The location where ET expects to find the files will be specified in the LISTFILE that the user supplied to the et_put.py command, or all files and directories under the DIR. The status of user’s batches can be checked by going to the webpage:
http://et-monitor.fds.rl.ac.uk/et_user/ET_AlertWatch.php
.
You need to be logged into JASMIN to see this webpage, via the nx login servers, and use Firefox as the web browser.
Deleting the data from disk prematurely can cause problems for the ET system as a whole (impacting other users) so please be careful with this aspect.
et_get.py
Command-line tool to download large numbers of files from Elastic Tape
Return codes
0: normal exit
1: error in start up parameters
2: cannot write to target directory
3: error received during download
4: closed by interrupt (^c probably)
5: completed with "bad files" (see list via stderr)et_rm.py
Command-line tool to delete files from Elastic Tape
Return codes
rc 0: normal exit
rc 1: error in start up parameters
rc 2: error processing listet_ls.py
Command-line tool for listing holdings in Elastic Tape
et_ls.py and grep
The first character on any data line is the line’s type. This allows a script to know the type of line it is trying to parse
Return codes
0: normal exit
1: error in start up parameters or reading config file
2: requestor is not authorised for the intended workspace
4: closed by interrupt (^c probably) or as a result of a head/tail commandet_transfer_mp
Return codes
0: OK
1: config error
2: log directory error
3: already running
4: error creating client