I though that both the capacity and fair share scheduler are available in 0.19. Are there new features add in 0.20? Is that documented anywhere? How do I learn more?
Bill On Fri, Mar 20, 2009 at 7:28 AM, David B. Ritch <david.ri...@gmail.com>wrote: > Looks like there's been quite a bit of work on both the Capacity > Scheduler and the Fair Scheduler. Are there others we should look at in > 20.0? > > Again, thank you for your informative responses. > > David > > Raghu Angadi wrote: > > > > I think 0.20.0 is preferred because of new job scheduler(s) there. > > Stability wise, 0.20 is expected to be as good as 0.19.2. > > > > I don't know the schedule for 0.19.2. > > > > Raghu. > > > > David Ritch wrote: > >> Raghu, > >> > >> Thank you for your prompt and informative response. Moving to > >> anything that > >> ends in .0 is a bit scary - what are the reasons to go with 0.20.0 > >> instead > >> of 0.19.2? Yahoo is jumping from 0.18.x directly to 0.20.0? Why is > >> Yahoo > >> skipping the 0.19.x release? > >> > >> Is the expectation that 0.19.2 will be released at the same time as > >> 0.20.0? > >> > >> Thanks, > >> > >> David > >> > >> On Wed, Mar 18, 2009 at 1:31 PM, Raghu Angadi <rang...@yahoo-inc.com> > >> wrote: > >> > >>> Short is answer I am afraid is no. > >>> > >>> As an alternative, I recommend upgrading to latest 0.19.x or 0.20.0 > >>> (to be > >>> released in couple of days). 0.19.2 is certainly a lot better than > >>> 0.19.0. > >>> Yahoo is rolling out 0.20.x if that helps your confidence. > >>> > >>> Raghu. > >>> > >>> > >>> David Ritch wrote: > >>> > >>>> There is an established procedure for upgrading from one release of > >>>> Hadoop > >>>> to a newer release. Is there something similar to move back to an > >>>> lower-numered release? > >>>> > >>>> Specifically, we have data in a cloud running Hadoop-19.0. Because of > >>>> stability issues, we are wondering whether we should move back to > >>>> 18, but > >>>> we > >>>> don't want to lose our data. Is there a downward migration path? > >>>> > >>>> Thanks, > >>>> > >>>> David > >>>> > >>>> > >> > > > > > >
