[sqlite] How can I test test_onefile.c?

How can I test test_one_file.c or test_demovfs? I want to use Some VFS shims in website like test_demovfs.c or test_onefile.c . But I don't know how can I use them. Is there some documentation about using them? or Is there any tips for me? ___

[sqlite] Questions regarding using test_onefile as VFS

The documentation seems to state that in order to use test_onefile, instead of providing an option when compiling sqlite3, test_onefile must be set as vfs with the -vfs command option in the shell. Is my understanding correct? The documentation does not provide examples using vfs demo files

[sqlite] Is there any reason which use OS file system on default mode?

If sqlite3 access storage device directly, I think, it must be faster than using os file system. Because using os file system mean there must be some overhead. So, I'm curious about the reason why use os file system default. ___ sqlite-users mailing

[sqlite] Is there any document, when I wanna implement own VFS?

I spend much time to find for reference of implementing VFS. But I can’t find any reference of that. I wanna know some requirement and manual for implementing my own VFS. Is there anything that help me? ___ sqlite-users mailing list

[sqlite] Can sqlite access storage system directly?

After spend quite long time search for regarding to use file I/O in SQLite, I've found that through the VFS layer is the only way go into the kernel. However I am wandering about if there is other method to detour filesystem, so that SQLite is directly interface with device driver