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Imagine situation when it's needed to programmatically create new multi data object, recognizable by some module-defined data loader. During creation, it's needed to create individual files or folders (through file systems) that constitutes data object and then find it using DataObject.find(promaryFileObject). So far so good, but creation of individual files or folders must be done in atomic action! which is not intuitive at all and module writers will miss it for sure. Reason is that FolderRecognizer thread runs asynchronously and can interfere with process of creationg pieces of data object. As a result data object is unrecognized for a while, in spite of all its files are correctly created. Ideally no atomic action should be needed, FolderRecognizer should react immediatelly somehow.
Changed owner David S. -> David K.
Changing TM to FUTURE for several DataSystem enhancements. The DS are planned for rewrite and so it does not make sense to invest time into these enhancements. If you think the issue is important and should be fixed for 4.0 then feel free to let me know. I'm open to change the plan.
No, try to avoid loaders grouping more files. AFAIK winsys does not need them now.