Changes between Version 9 and Version 10 of DevelopmentActivities/ORCHIDEE-MICT-IMBALANCE-P/shared

Timestamp:

2018-03-27T15:30:34+02:00 (6 years ago)

Author:

ajornet

Comment:

--

DevelopmentActivities/ORCHIDEE-MICT-IMBALANCE-P/shared

@@ -21 +21 @@
 More info: https://intranet.lsce.ipsl.fr/informatique/en/stage/index.php
 
+{{{
+What is archive:
+
+The LSCE long term archive system allows users to store on a tape library old files that need to be kept.
+Files stored on the system are never destroyed and can always be retrieved and brought-back on disks, as long as the tape is not destroyed.
+A data tape is a passive device and its expected life-time is supposed to be many years (theory says 30 years...).
+The LSCE tape library uses LTO5 tapes cartridges and the total space is around 300Tb.
+
+BEWARE: As in all electronic systems, failure and errors can occur. There is no guarantee that the files can be retrieved...
+Usage:
+
+All files and directories under /home can be archived.
+
+Commands available:
+
+    stageput to save files and directories
+    stagein to get back files and directories
+    stagelist to list saved files
+    stageq to list current operations (save/retry) in queue
+    stageclear to remove the file's entry from the tape/file database.
+
+All these have some important options. Read the man for more details.
+
+The system does not automatically destroy files after saving them.
+
+The archive system is available from all asterix and obelix computers (including the batch system).
+To use it directly from a linux desktop (Fedora), run the following command to install the software:
+
+    yum -y install stager-client-lsce 
+
+Importante notes:
+
+    No file can be removed from a tape.
+    Confidentiality of archived files can't be guaranteed.
+
+Good rules:
+
+    For efficiency, it's better not to write small files on tapes. To save a big "tar" file is much better than saving a lot of small files.
+    The minimum size for a file should be 1Gb.
+    Give a good name to the file, to retrieve it easily.
+}}}
+
+
 == Contributing ==