2013/7/10 Stewart Smith <[email protected]> > Roberto Spadim <[email protected]> writes: > > well, another doubts that i had some time ago reading unireg source... > > > > 1)why it have a 64k limit? that's a logical limit (a limit in int > variable > > or char or something like it)? or just a "well i think 64k is a good > > 'constant' limit"? > > 2^16 is why there's that limit. > ok but why 2^16? it's based in some structure with a variable type that can't handler > 2^16 bytes? or just a number like 65555 65554 65553... ?
> > 2)why we "still" with this "old" unireg format? > > i know that someone must start the new format and it will not be > compatible > > with mysql... > > but there's any raw idea or a issue in mdev or lauchpad about changing > .frm > > format or creating a new one? > > > > maybe something more human readable YAML or JSON, and a space for engine > > information https://mariadb.atlassian.net/browse/MDEV-3936 > > See my other post: Drizzle has a protobuf based format. It's non trivial > to make the server behave with this though. It appears there's some code > in MariaDB to construct server data structures from a SQL statement > though, so perhaps that's more usable. > > -- > Stewart Smith > humm i read something about protobuf, but is it human readable? i see yaml and json more common to web standards but they don't have a 'xml schema', while protobuf have a optional / required other doubt, does this increase open/close expend time? for example, today frm = 0.1ms, protobuf=1ms, or something like it? or file parse time isn't the main time consume open/close expend time? -- Roberto Spadim SPAEmpresarial
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