I also believe its worth a week's wait to include HDFS-6584 and HDFS-6581 in 2.6.
On Wed, Sep 24, 2014 at 3:28 PM, Suresh Srinivas <sur...@hortonworks.com> wrote: > Given some of the features are in final stages of stabilization, > Arun, we should hold off creating 2.6 branch or building an RC by a week? > All the features in flux are important ones and worth delaying the release > by a week. > > On Wed, Sep 24, 2014 at 11:36 AM, Andrew Wang <andrew.w...@cloudera.com> > wrote: > > > Hey Nicholas, > > > > My concern about Archival Storage isn't related to the code quality or > the > > size of the feature. I think that you and Jing did good work. My concern > is > > that once we ship, we're locked into that set of archival storage APIs, > and > > these APIs are not yet finalized. Simply being able to turn off the > feature > > does not change the compatibility story. > > > > I'm willing to devote time to help review these JIRAs and kick the tires > on > > the APIs, but my point above was that I'm not sure it'd all be done by > the > > end of the week. Testing might also reveal additional changes that need > to > > be made, which also might not happen by end-of-week. > > > > I guess the question before us is if we're comfortable putting something > in > > branch-2.6 and then potentially adding API changes after. I'm okay with > > that as long as we're all aware that this might happen. > > > > Arun, as RM is this cool with you? Again, I like this feature and I'm > fine > > with it's inclusion, just a heads up that we might need some extra time > to > > finalize things before an RC can be cut. > > > > Thanks, > > Andrew > > > > On Tue, Sep 23, 2014 at 7:30 PM, Tsz Wo (Nicholas), Sze < > > s29752-hadoop...@yahoo.com.invalid> wrote: > > > > > Hi, > > > > > > I am worry about KMS and transparent encryption since there are quite > > many > > > bugs discovered after it got merged to branch-2. It gives us an > > impression > > > that the feature is not yet well tested. Indeed, transparent > encryption > > is > > > a complicated feature which changes the core part of HDFS. It is not > > easy > > > to get everything right. > > > > > > > > > For HDFS-6584: Archival Storage, it is a relatively simple and low risk > > > feature. It introduces a new storage type ARCHIVE and the concept of > > block > > > storage policy to HDFS. When a cluster is configured with ARCHIVE > > storage, > > > the blocks will be stored using the appropriate storage types specified > > by > > > storage policies assigned to the files/directories. Cluster admin > could > > > disable the feature by simply not configuring any storage type and not > > > setting any storage policy as before. As Suresh mentioned, HDFS-6584 > is > > > in the final stages to be merged to branch-2. > > > > > > Regards, > > > Tsz-Wo > > > > > > > > > > > > On Wednesday, September 24, 2014 7:00 AM, Suresh Srinivas < > > > sur...@hortonworks.com> wrote: > > > > > > > > > > > > > > > > > >I actually would like to see both archival storage and single replica > > > >memory writes to be in 2.6 release. Archival storage is in the final > > > stages > > > >of getting ready for branch-2 merge as Nicholas has already indicated > on > > > >the dev mailing list. Hopefully HDFS-6581 gets ready sooner. Both of > > these > > > >features are being in development for sometime. > > > > > > > >On Tue, Sep 23, 2014 at 3:27 PM, Andrew Wang < > andrew.w...@cloudera.com> > > > >wrote: > > > > > > > >> Hey Arun, > > > >> > > > >> Maybe we could do a quick run through of the Roadmap wiki and > > > add/retarget > > > >> things accordingly? > > > >> > > > >> I think the KMS and transparent encryption are ready to go. We've > got > > a > > > >> very few further bug fixes pending, but that's it. > > > >> > > > >> Two HDFS things that I think probably won't make the end of the week > > are > > > >> archival storage (HDFS-6584) and single replica memory writes > > > (HDFS-6581), > > > >> which I believe are under the HSM banner. HDFS-6484 was just merged > to > > > >> trunk and I think needs a little more work before it goes into > > branch-2. > > > >> HDFS-6581 hasn't even been merged to trunk yet, so seems a bit > further > > > off > > > >> yet. > > > >> > > > >> Just my 2c as I did not work directly on these features. I just > > > generally > > > >> shy away from shipping bits quite this fresh. > > > >> > > > >> Thanks, > > > >> Andrew > > > >> > > > >> On Tue, Sep 23, 2014 at 3:03 PM, Arun Murthy <a...@hortonworks.com> > > > wrote: > > > >> > > > >> > Looks like most of the content is in and hadoop-2.6 is shaping up > > > nicely. > > > >> > > > > >> > I'll create branch-2.6 by end of the week and we can go from there > > to > > > >> > stabilize it - hopefully in the next few weeks. > > > >> > > > > >> > Thoughts? > > > >> > > > > >> > thanks, > > > >> > Arun > > > >> > > > > >> > On Tue, Aug 12, 2014 at 1:34 PM, Arun C Murthy < > a...@hortonworks.com > > > > > > >> > wrote: > > > >> > > > > >> > > Folks, > > > >> > > > > > >> > > With hadoop-2.5 nearly done, it's time to start thinking ahead > to > > > >> > > hadoop-2.6. > > > >> > > > > > >> > > Currently, here is the Roadmap per the wiki: > > > >> > > > > > >> > > • HADOOP > > > >> > > • Credential provider HADOOP-10607 > > > >> > > • HDFS > > > >> > > • Heterogeneous storage (Phase 2) - Support APIs > > for > > > >> > using > > > >> > > storage tiers by the applications HDFS-5682 > > > >> > > • Memory as storage tier HDFS-5851 > > > >> > > • YARN > > > >> > > • Dynamic Resource Configuration YARN-291 > > > >> > > • NodeManager Restart YARN-1336 > > > >> > > • ResourceManager HA Phase 2 YARN-556 > > > >> > > • Support for admin-specified labels in YARN > > > YARN-796 > > > >> > > • Support for automatic, shared cache for YARN > > > >> > application > > > >> > > artifacts YARN-1492 > > > >> > > • Support NodeGroup layer topology on YARN > YARN-18 > > > >> > > • Support for Docker containers in YARN > YARN-1964 > > > >> > > • YARN service registry YARN-913 > > > >> > > > > > >> > > My suspicion is, as is normal, some will make the cut and some > > > won't. > > > >> > > Please do add/subtract from the list as appropriate. Ideally, it > > > would > > > >> be > > > >> > > good to ship hadoop-2.6 in a 6-8 weeks (say, October) to keep > up a > > > >> > cadence. > > > >> > > > > > >> > > More importantly, as we discussed previously, we'd like > > hadoop-2.6 > > > to > > > >> be > > > >> > > the *last* Apache Hadoop 2.x release which support JDK6. I'll > > start > > > a > > > >> > > discussion with other communities (HBase, Pig, Hive, Oozie etc.) > > and > > > >> see > > > >> > > how they feel about this. > > > >> > > > > > >> > > thanks, > > > >> > > Arun > > > >> > > > > > >> > > > > > >> > > > > >> > > > > >> > -- > > > >> > > > > >> > -- > > > >> > Arun C. 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