WhatIs: The XIOS library - Historique des versions

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The [https://forge.ipsl.jussieu.fr/ioserver/wiki XIOS] (Xml I/O Server) library is based on client-server principles where the server manages the outputs asynchronously from the client (the climate model) so that the bottleneck of writing data is alleviated.

All aspects of the outputs (name, units, file, post-processing operations, etc.) are controlled by dedicated XML files which are read at run-time. Samples of xml files are provided in the "DefLists" directory.

To compile with XIOS enabled, one must specify the option
-io xios
to the makelmdz_fcm script.

In addition the flag
ok_all_xml=y
should be set (in the config.def file) or else the default behavior, i.e. outputs controlled and generated by the IOIPSL library, will occur.

20/11/2021

[[Category:WhatIs]]

@@ Ligne 3 : / Ligne 3 : @@
 To compile with XIOS enabled, one must specify the option
   -io xios
 to the makelmdz_fcm script.
@@ Ligne 17 : / Ligne 19 : @@
 In a nutshell:
 * the master file read by XIOS is ''iodef.xml''; and contains specific XIOS parameters such as ''using_server'' to dictate whether XIOS is run in client-server mode (true) or attached (false) mode, ''info_level'' to set the verbosity of XIOS messages (0: none, 100: very verbose), ''print_file'' to set whether XIOS messages will be sent to standard output (false) or dedicated xios_*.out and xios_*.err files (true).
-<pre>
+<syntaxhighlight lang="xml">
                          <variable id="using_server" type="bool">false</variable>
                          <variable id="info_level" type="int">0</variable>
                          <variable id="print_file" type="bool"> false </variable>
-</pre>
+</syntaxhighlight>
 * It is common practice to have LMDZ-related definitions and outputs in separate XML files, e.g. ''context_lmdz.xml'' which are included in ''iodef.xml'' via the ''src'' attribute, e.g.
-<pre>
+<syntaxhighlight lang="xml">
         <context id="LMDZ" src="./context_lmdz.xml"/>
-</pre>
+</syntaxhighlight>
-The ''context_lmdz.xml'' file must then contain all fields/grid/file output definitions (which may be split into multiple XML files).
+The ''context_lmdz.xml'' file must then contain all fields/grid/file output definitions, which may be split into multiple XML files. Current practice is to use separate ''file_def_histsomething_lmdz.xml'' files, one for each ''histsomething.nc'' file to generate, and include these in ''context_lmdz.xml'' using the ''file_definition'' key. e.g.:
-/11/2021
+  <file_definition src="./file_def_histday_lmdz.xml"/>
 [[Category:WhatIs]]
 [[Category:Xios]]

@@ Ligne 16 : / Ligne 16 : @@
 In a nutshell:
-* the master file read by XIOS is ''iodef.xml''; and contains specific XIOS parameters such as ''using_server'' to dictate whether XIOS is run in client-server mode (true) or attached (false) mode, ''info_level'' to set the verbosity of XIOS messages (0: none, 100: very verbose), ''print_file'' to set whether XIOS messages will be sent to standard output (false) or dedicated xios_*.out and xios_*.err files.
+* the master file read by XIOS is ''iodef.xml''; and contains specific XIOS parameters such as ''using_server'' to dictate whether XIOS is run in client-server mode (true) or attached (false) mode, ''info_level'' to set the verbosity of XIOS messages (0: none, 100: very verbose), ''print_file'' to set whether XIOS messages will be sent to standard output (false) or dedicated xios_*.out and xios_*.err files (true).
 <pre>
                          <variable id="using_server" type="bool">false</variable>

@@ Ligne 1 : / Ligne 1 : @@
 The [https://forge.ipsl.jussieu.fr/ioserver/wiki XIOS] (Xml I/O Server) library is based on client-server principles where the server manages the outputs asynchronously from the client (the climate model) so that the bottleneck of writing data is alleviated.
 To compile with XIOS enabled, one must specify the option
@@ Ligne 11 : / Ligne 9 : @@
   ok_all_xml=y
 should be set (in the config.def file) or else the default behavior, i.e. outputs controlled and generated by the IOIPSL library, will occur.
 /11/2021
 [[Category:WhatIs]]