Am Sonntag, 7. Dezember 2014, 10:20:27 schrieb ashford@xxxxxxxxxxxxx: > Martin, > > > I read that the actual > > what is free is unknown. And there are several reasons for that: > > > > 1) On a compressed filesystem you cannot know, but only estimate the > > compression ratio for future data. > > It is NOT the job of BTRFS, or ANY file-system, to try to prodict the > future. The future is unknown. Don't try to account for it. When asked > for the status (i.e. 'df'), it should return the current status. > > > 2) On a compressed filesystem you can choose to have parts of it > > uncompressed by file / directory attributes, I think. BTRFS can't > > know how much of the > > future data you are going to store compressed or uncompressed. > > Same as above. What is the point you are trying to make? I just described the reasons on what problems there are with trying to predict available free space, with BTRFS as an example. Some points apply to all filesystems, some do not, so what is the point you are trying to make? -- Martin 'Helios' Steigerwald - http://www.Lichtvoll.de GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7 -- 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
