Re: unsolvable technical issues?

[Ferry Toth <ftoth@telfort.nl>]

waxhead wrote:

> Jukka Larja wrote:
>> waxhead wrote 24.6.2018 klo 1.01:
>>> Nikolay Borisov wrote:
>>>>
>>>> On 22.06.2018 02:13, waxhead wrote:
>>>>> According to this:
>>>>>
>>>>> https://stratis-storage.github.io/StratisSoftwareDesign.pdf
>>>>> Page 4 , section 1.2
>>>>>
>>>>> It claims that BTRFS still have significant technical issues that may
>>>>> never be resolved.
>>>>> Could someone shed some light on exactly what these technical issues
>>>>> might be?! What are BTRFS biggest technical problems?
>>>>
>>>> That's a question that needs to be directed at the author of the
>>>> statement.
>>>>
>>> I think not, and here's why: I am asking the BTRFS developers a
>>> general question , with some basis as to why I became curious. The
>>> question is simply what (if any) are the biggest technical issues in
>>> BTRFS because one must expect that if anyone is going to give me a
>>> credible answer it must be the people that hack on BTRFS and
>>> understand what they are working on and not the stratis guys. It would
>>> surprise me if they knew better than the BTRFS devs.
>> 
>> I think the problem with that question is that it is too general.
>> Duncan's post already highlights several things that could be a
>> significant problem for some user while being non-issue for most.
>> Without more specific problem description, best you can hope for is
>> speculation on things that Btrfs currently does badly.
>> 
>> -Jukka Larja
> 
> Well, I still don't agree (apparently I am starting to become
> difficult). There is a "roadmap" on the BTRFS wiki that describes
> features implemented and feature planned for example. Naturally people
> are working on improvements to existing features and prep-work for new
> features. If some of this work is not moving ahead due to design issues
> it sounds likely that someone would know about it by now.

This one doesn't seem to be moving ahead, while it seems like a very 
promising one: Hot data tracking and moving to faster devices (or provided 
on the generic VFS layer)

It would be really fantastic to just add a ssd to a pool of hdd's and have 
fsync sensitive stuff run normally (dpkg on raid10 with 50 snapshots 
currently can take hours to do a few minute job)

> 
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