Re: [Libguestfs] [PATCH] New API: btrfs_device_stats

Hi, Pino 在 2015年06月18日 16:41, Pino Toscano 写道: > Hi, > > On Thursday 18 June 2015 11:01:37 Cao jin wrote: >>> Speaking of this: you said that you have a colleague working on >>> btrfs-progs? What about suggesting to create some machine-parseable >>> output (csv, xml, yaml, json, whatever) so extracting the results of >>> btrfs tools is a lot more easy? >>> >> >> Yes, I forward your suggestion and consult him, the result is not >> surprised:( Here is what I learned from him: >> For the btrfs-progs cmds who output strings, the output are plain, >> don`t have patterns. Seen some guys who want a formatted output, they do >> a filter by themself, it not reasonable to ask btrfs-progs to output >> formatted strings. > > This is exactly the issue here: every btrfs command has a totally > different formatting for its output. Just let him take a look at all > the commands implemented so far in libguestfs, you can easily spot > that: > - btrfs subvolume list > - btrfs subvolume show > - btrfs qgroup show > - btrfs balance status > - btrfs scrub status > - btrfs device stats > all have different custom parsers for each of their outputs. > > Compare that to e.g. the -m parameter for parted, so it outputs fields > separated by semi-colon. > Already forward your mail to my colleague. He think your comment is interesting, and also forward your option to btrfs-progs mail-list.

Speaking of btrfs device stats output, what do you suggest to do for now? Since it may has multi devices.