Re: [Mysqlfs-general] Some questions.

[Michal L. <mi...@lo...>]

Stef Bon wrote:

> First the overwriting of a file by another smaller one. This makes
> (if both files differ much in size and both are big enough) that 
> datablocks will be deleted. I've been searching the
> sourcecode, but cannot find out how this works exactly. So before a file 
> is written, there should be a procedure which
> checks the file already exits, and removes the datablocks which will not 
> be used. Is this right? If so, where can I find this
> in the sourcecode?

Hi,
have a look at mysqlfs_truncate() in mysqlfs.c and query_truncate() in
query.c. These two ensure that the non-used blocks are removed.

Michal