Re: [Lsf-pc] [LSF/MM TOPIC] Online filesystem check framework

[Goldwyn Rodrigues <rgoldwyn@suse.de>]

On 01/22/2016 03:06 PM, Jan Kara wrote:
> Hello,
>
> On Thu 21-01-16 22:45:29, Goldwyn Rodrigues wrote:
>> Topic: Generic Online filesystem Check framework
>>
>> Motivation:
>>   + Better uptime - Filesystems turn read-only at the first error encountered
>> and it may block critical applications which have not encountered the error.
>>   + Unmountable Filesystems - Some filesystems such as clustered filesystem
>> may not be unmountable because they are used by too many computers to be
>> taken offline.
>>   + Autofix - may sound dangerous as fixing is without user intervention, but
>> an option may help admins which are looking for a good uptime.
>>   + Logic inbuilt - most logic of access to filesystem is already in the
>> filesystem driver. The fix/check would make use of existing functionality.
>>
>> Framework would be around providing a generic interface framework which
>> would use inode numbers as the basic unit to check or fix. Other metadata
>> may need special parameters. Userspace scripts will issue check/fixes to the
>> system, which may/may not be driven by
>
> Well, this is a very difficult topic so I think we need some concrete
> proposal and ideally some RFC code about what you think needs to be done to
> make online fsck possible. Without that it will be just a useless
> handwaving since I don't think anybody is able to come up with a decent
> proposal during that half an hour session...


Yes, I do have something more than this in mind, and I will come up with 
an RFC and hopefully some code. I will try and post it by the deadline 
of Feb 11.



-- 
Goldwyn