Memory-based access to definition/sample files - ECC BUFR FAQ

Memory-based access to definition/sample files

Step-by-step guide

The definition and sample files used by ecCodes engine to decode all kind of messages can be built into the library (embedded) providing a performance improvement by significantly reducing access to the filesystem.

1. This feature is called MEMFS (MEMory FileSystem) and can be enabled at configuration time (when you invoke cmake) by:

   
   

      cmake /path/to/src -DENABLE_MEMFS=ON

2. This will take longer to compile and the resulting library will be larger but whenever a definition file (*.def or *.table) or a sample file (*.tmpl) is accessed, its contents will be fetched from memory and no access to the file system will be made.

3. If you invoke the codes_info tool with this configuration, the paths reported will contain the prefix "/MEMFS/".

   Please note that once ecCodes is built in this mode, any subsequent changes to the installed definition/sample files will NOT be picked up

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