Tdms vs cluster where when speed doesn't matter

hello,
The question is in the title: in case speed doesn't matter wich could be advantage using one or other of methode.
I 'm working on calibration bench at low speed ( T° of water , humidity, barometer) so hdd access is not a parameter.
i have to store , author, date ~20 data information like that an then test data ( ~10 * 2Darray(~10*10) ).
I'm new to this kind of programming . I think both are possibles , but i would like to start knowing what can be the
best before involving to much in one method before realizing the other was better adapted.
What are avantage disavantages like easy of coding, scalability, ...
Best regards
Tinnitus
CLAD / Labview 2011, Win Xp
Mission d'une semaine- à plusieurs mois laissez moi un MP...
RP et Midi-pyrénées .Km+++ si possibilité de télétravail
Kudos always accepted / Les petits clicks jaunes sont toujours appréciés
Don't forget to valid a good answer / pensez à valider une réponse correcte

For scalability and future expansion, I would strongly recommend you save your data as discrete units, not clusters. Be sure to include a file format version number. This will allow you to change the format in the future and still read old files. More importantly, it will allow old code to fail gracefully (if necessary) when attempting to read newer, different format, files. Make sure you take this into account in your design. Some options in LabVIEW:
TDMS - would be perfect for you, except it does not support 2D arrays. In your case, the workaround (storing multiple 1D arrays) is not very onerous. This is probably your first choice. It can be easily converted to ASCII and/or read by Excel if needed.
Config File - this API set would also work fairly well for you. It is text based, so be careful of your formatting for any numbers you save. It is easy to lose resolution and get into problems. Once, again, arrays are not natively handled. You can work around this easily enough by converting the arrays to strings before writing. Again, you will probably want to create a key for each line of the array, since extra CR/LFs will cause problems when reading.
HDF5 - this is a far more difficult method, but avoids the issues of the previous two. You can get the API here (a Google search will give you more LabVIEW APIs, this one is rather old). HDF5 is difficult to learn but highly flexible and can be read by most commercial analysis packages.
Good luck. Let us know if you need more information.
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