Sam, I also want to clarify one more thing about my last statement. YARN is present in the 2.x line also (not just 3.x/trunk). From your original question, it sounds like you're not considering the 2.x line, but I also didn't want to mislead you into thinking that YARN is only introduced in trunk.
Thanks, --Chris On Wed, Nov 28, 2012 at 8:50 AM, Chris Nauroth <cnaur...@hortonworks.com>wrote: > Hi Sam, > > Also notable in 3.x (trunk) is the switch to YARN as the underlying > framework for MapReduce. It's backwards-compatible though, so your > existing MapReduce jobs will still work. More on YARN here: > > > http://hadoop.apache.org/docs/r0.23.0/hadoop-yarn/hadoop-yarn-site/YARN.html > > --Chris > > On Wed, Nov 28, 2012 at 2:08 AM, Harsh J <ha...@cloudera.com> wrote: > >> Hi, >> >> >> On Wed, Nov 28, 2012 at 11:24 AM, sam liu <samliuhad...@gmail.com> wrote: >> > >> > Hi Harsh， >> > >> > Thanks very much for your detailed explanation! >> > >> > For 1.x line, we really want to know which release could be used by us, >> so >> > have further questions: >> > - Is 1.2.0 more advanced that 1.1.1? >> > - Do we have general release time of above two releases? >> >> The release numbering is so, AFAICT given the releases we've made: >> >> N.x.y >> >> x = minor releases with considerable amount of improvements >> y = mainly critical fix releases >> >> We have not yet branched the 1.2.0 release, and a vote is in progress >> for the 1.1.1 release. I expect, if you want to pick one up very soon, >> you may choose 1.1.1 which should be made officially available in a >> week or two. >> >> Note that we do care not to break compatibility within an N line. >> Meaning, upgrading from a 1.x1 to 1.x2 release is a trivial effort >> equal to a restart of cluster (no metadata upgrades). >> >> > For 2.x line: >> > - Will its stable release contain all fixes and features of 1.x line? >> >> Speaking for HDFS, this is true. >> >> > - Can we know the general release time of the coming stable release of >> 2.x >> > line? >> >> The next release, 2.0.3, is yet to be finalized, but I expect a vote >> to be called sometime soon. I am unsure if it will still be tagged >> unstable or not. From my experience so far of users/customers running >> 2.x based HDFS (with or without HA), I've hardly seen any major issues >> that may shed bad light on its stability. >> >> > Sam Liu >> <snip> >> >> -- >> Harsh J >> > >
