> > The goal is that an eMMC flash chip survives 15 years. And as we all > > know flash memory only supports a limited amount writes per cell before it > fails. > > So if I get data to store from the user I would like to estimate > > before putting it into the database how much pages SQLite is going to > > write/modify to the flash. Is there any API, which can provide me such an > estimation? > > > > I will also use a VFS shim to get the real number of written bytes > > afterwards. > > There is no such API that I can think of. I think you will need to write a > custom VFS shim to get that information. I suspect > https://www.sqlite.org/src/file/ext/misc/vfsstat.c is sufficient for this > task. > > The best way I know of to minimize flash wear is to switch to the F2FS > filesystem and use PRAGMA journal_mode=DELETE. If you cannot use the > F2FS filesystem, then PRAGMA journal_mode=WAL with PRAGMA > synchronous=NORMAL is probably your best bet.
Thank you. I will try that. BR, Lutz _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
