How to store dynamic data (unknown number of fields) to a file?

Question

I need to store some data in a file. FOR THE MOMENT each record (data set) consists in:

• a string (variable length),
• an array of integers (variable len

Answer 1

I can think of something like one ini- or XML file per "record", with INI files stored in a virtual file system like our SolFS. I don't know, however, what you mean by "easily support 1 mln rows", i.e. what operations must be supported. If you plan mainly random access to some smaller number of records, then it's not a big deal to parse the text files. In other case you might want to look at some binary format, such as binary XML. I can say that TMCDataTree class of our other product, MsgConnect, supports hierarchical ini files saved in binary format.