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From Konstantin Shvachko <shv.had...@gmail.com>
Subject Re: [VOTE] Release hadoop-0.22.0-rc0
Date Sun, 04 Dec 2011 00:28:29 GMT
On Fri, Dec 2, 2011 at 6:48 PM, Eric Baldeschwieler
<eric14@hortonworks.com> wrote:
> I'm fine with the idea of alpha releases. I think they are important.  I'm a bit confused
on where this is going.
> what are your criteria for declaring the 0.22 branch stable?

I am not declaring anything. I am just proposing a release, which a
part of the community worked on and which runs on several clusters
that I can observe.
It is up to the community to decide what is stable and what is not.

> Is compatibility with 1.0 and security a goal for this release line?

As previously discussed security is turned off in this release.
LinuxTaskController has been removed.
I don't know what you mean by compatibility with 1.0.


> ---
> E14 - typing on glass
> On Dec 2, 2011, at 1:15 AM, Konstantin Shvachko <shv.hadoop@gmail.com> wrote:
>> This is a well tested state of the branch, which imo worth releasing.
>> Adding changes at this point will invalidate the testing.
>> 0.23 has "substantial regressions from the stable line" as well, and
>> is not stable.
>> 1.0 does not have important features including some in MR that 0.22 has.
>> What is a regression!
>> 0.22 is progress in at least one area, which is HDFS.
>> People can actually start appending data to files, use links, and
>> build features (e.g. HA) based on BackupNode.
>> HBase clusters should not be segregated anymore as HBase-only ones,
>> but will allow general load as well.
>> Speaking of confusing. What isn't in Hadoop this days. Say, when you
>> transition from Hadoop 1.0 to 0.22 or 0.23 you call it upgrade.
>> Seriously. This project needs to move forward beyond the 0.20 line. I
>> tested 0.22 in the last three months and found it working with HBase,
>> Hive, Pig, Cascading, Zookeeper, Oozie. What else do you need to
>> release? It is not perfect? Agreed. Have anybody seen a perfect piece
>> of software? I haven't.
>> Eric, thank you for raising the question. It is important to
>> understand the pros and cons of different versions.
>> You should try the candidate, who knows it might just work for you.
>> --Konstantin
>> On Thu, Dec 1, 2011 at 10:26 PM, Eric Baldeschwieler
>> <eric14@hortonworks.com> wrote:
>>> So this release contains substantial regressions from the stable line and contains
a subset of features in 0.23.
>>> Wouldn't it be prudent to wait until the branch is compelling when compared to
one of the other release lines before releasing?  Otherwise this just seems confusing.
>>> ---
>>> E14 - typing on glass
>>> On Dec 1, 2011, at 6:10 PM, Konstantin Boudnik <cos@apache.org> wrote:
>>>> +1
>>>> Checksum are correct, license is in place
>>>> Single node cluster (Ubuntu 11.04) installation and a mapreduce job worked
>>>> without any issues.
>>>> Cos
>>>> On Tue, Nov 29, 2011 at 02:47AM, Konstantin Shvachko wrote:
>>>>> I created a release candidate for hadoop-0.22.0 available for review
>>>>> http://people.apache.org/~shv/hadoop-0.22.0-rc0/
>>>>> The candidate incorporates more than 700 fixed jiras counting from the
>>>>> release of 0.21.0.
>>>>> The branch was cut on November 17 last year. During this year the
>>>>> branch was tested by different groups in the Hadoop community.
>>>>> Recently it has been extensively tested on a mid-size cluster.
>>>>> It contains important improvements, optimizations and bug fixes for
>>>>> HDFS and MapReduce compared to 0.21.0. Some features introduced in the
>>>>> latest offspring releases of hadoop-security are not yet ported to
>>>>> this branch, which is mostly related to security and MapReduce
>>>>> improvements. Compared to 0.23.0 this release will not contain
>>>>> Federation or Yarn.
>>>>> The hadoop-0.22.0 release build is fully automated thanks to the
>>>>> BigTop team. rc0 artifacts are available and reproducible on Hadoop
>>>>> Jenkins. The validity of rc0 has been also verified with BigTop.
>>>>> I think this could be a usable release and an important step forward
>>>>> in the Hadoop roadmap.
>>>>> Many people contributed to hadoop-0.22. Thank you everybody who
>>>>> developed code, built, tested, found and fixed bugs or supported this
>>>>> effort by any other means.
>>>>> Please try it out and vote.
>>>>> Thanks,
>>>>> --Konstantin

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