[Libguestfs] [PATCH] New API: btrfs_device_stats

[Cao jin]

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.

-- 
Yours Sincerely,

Cao Jin