In my experience RTC is better. As I can see Ignite evolving very fast with this model. Why some one expects that RTC will slow down development?
I'm for RTC. On Tue, Jul 28, 2015 at 6:30 AM, Konstantin Boudnik <c...@apache.org> wrote: > On Tue, Jul 28, 2015 at 01:09AM, Branko Čibej wrote: > > On 27.07.2015 18:29, Sergi Vladykin wrote: > > > Guys, > > > > > > I would say Ignite is quite a big and quite complex project. > > > > This has absolutely nothing to do with trusting developers. FWIW, > > Subversion is also very complex, I'll dare say that its object model and > > working copy semantics are more convoluted than anything you'll find in > > Ignite. We make do with CTR quite well. > > > > > > > Also we have > > > really tough requirements for performance, stability, backward > > > compatibility, etc... > > > > Write them down. Make sure new contributors understand them before > > offering them commit access. That's a prerequisite for growing an open > > community anyway. > > > > > Having said that it is really easy to break something > > > even with minor change like switching type of collection to another > one. > > > > So? Stuff like that should be documented in the code, if it isn't no > > amount of prior review will help, since how do you know that the > > reviewer happens to remember such details a few years from now? > > > > > And I personally feel safer when my code has been reviewed before I > merge > > > it to master. > > > > So ask for a review if you think you need it. I never said *all* reviews > > should be post-commit: I said that the default mode should be CTR and > > it's up to the developer to ask for more eyes on their code. > > > > > Also when thousand lines change set is merged and there are > > > conflicting change sets merged after, it is quite hard to rollback this > > > first change if it was wrong. And we have conflicting changes all the > time. > > > > Apparently you need to learn to use the version control tool you > > selected, or adjust your workflows for the failings of said tool. Or > > change the tool, who knows, you might find that's a good move. :) > > > > Regardless of which tool you use, conflicts should *ALWAYS* be resolved > > on the development branch, not on the mainline: the workflow should be: > > > > 1. create branch from mainline > > 2. make changes on branch > > 3. merge mainline to branch and resolve conflicts (repeat as needed) > > 4. run tests on branch code > > 5. merge branch to mainline > > > > Skipping step 3 (and 4) is going to be a constant pain regardless of > > which tool you use. Also for trivial changes it makes no sense at all to > > even create a branch; just fix it on the mainline, your version history > > will be a lot easier to follow. > > > > > My opinion is that correct trade off for us now is having slower but > more > > > predictable development. RTC approach here definitely fits better. > > > > RTC has an additional problem that it can (and often does; look at one > > of the most famous ASF projects if you don't believe me) create tensions > > in the community. It makes sense to use it for maintenance branches, but > > not for new development. > > Needless to say, I agree with everything just said (except for the VCS > change > proposition, which I found to be outright crazy, of course ;) > > And to pile more on top: I've experienced the consequences of the very > situation, described in the very last paragraph. The RTC lead to a totally > nuts situation in Hadoop, where fellas who wanted to reject a small patch, > not > based on the technical merits of the fix, had came up with an excuse that > the > reviewer (a full committer) didn't have enough expertise to review the > code in > question. The silliness was quickly put down by the sane community members, > but you see where I am going with it... > > In other words: if you don't trust a committer to make the changes in the > VCS > system - that committer shouldn't be having the commit-bit in the first > place. > Intricacies of roll-backs aren't an excuse and most often than not could be > fixed by changing the process hygiene. CTR attitude leads, in general, to a > higher quality of the contribution because ppl are trying to avoid public > scolding, inevitable in case of forced-reverts. With RTC the blame would be > shared between the author and the reviewer, which make situation more > bearable > (falsely, of course). And guess what - reviewers are humans and make > mistakes > all the time, but that was already pointed out. > > Cos > > -- Alexey Kuznetsov GridGain Systems www.gridgain.com
