[Gluster-Maintainers] inclusion of multi-threaded self-heal feature in 3.7.12

[Pranith Kumar Karampuri]

>> Give me a list of things that need to be done for building confidence for
>> inclusion of this patch and I will get it done.
>> At the moment like I said it already underwent more than a month of testing
>> and I feel it is stable. I also as a maintainer really want to keep the
>> promise to the users that 3.7. branch is stable and with good performance.
> It would be a good start if you can point to the testing that was, and
> the results. I hope that there are DiSTAF testcases that we can include
> too. Is there an easy way so that we can run all the healing test-cases
> with the current self-heal and with multi-threaded self-heal with
> different number of threads?

That makes sense. I will get a blog post which addresses questions like 
what this change brings in? how to use the feature? When it should be 
used? etc. With that I will keep the backports ready. I will also get 
the blog-post done by end of this week. Will update you guys. I think 
Paul had a nice graph with all numbers, will try to incorporate that 
into the blog-post as well.

Pranith
>
>>> You have to come with really good arguments to convince anyone from
>>> including a feature in stable branches. Disabling (or in this case one
>>> parallel heal) does not make much for backports.
>> Really good arguments is subjective Niels. Most of the users have been
>> asking for both this feature and throttling of self-heal traffic for years,
>> I feel it is stable enough to get into a branch. We are also keeping the
>> defaults such that users who don't care about this won't have any surprises.
>> I am happy to get anything and everything that the maintainer for 3.7.12 ask
>> for this patch to be included in 3.7.12 but I want this to get in for
>> 3.7.12.
> My main concern is that users will enable it without understanding the
> potential side effects that it can cause. Updates to the documentation,
> blog posts and clear guidance in the release notes are a must. In fact,
> you need these anyway for new features :-)
>
> Thanks,
> Niels