On Mon, Feb 10, 2014 at 7:02 PM, Roger Binns <rogerb@xxxxxxxxxxxxxx> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On 10/02/14 10:24, cwillu wrote: >> The regular df data used number should be the amount of space required >> to hold a backup of that content (assuming that the backup maintains >> reflinks and compression and so forth). >> >> There's no good answer for available space; > > I think the flipside of the above works well. How large a group of files > can you expect to create before you will get ENOSPC? > > That for example is the check code does that looks at df - "I need to put > in XGB of files - will it fit?" It is also what users do. But the answer changes dramatically depending on whether it's large numbers of small files or a small number of large files, and the conservative worst-case choice means we report a number that is half what is probably expected. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
