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Project Voldemort 0.81 released
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Alex Feinberg  
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 More options Jun 17 2010, 12:05 am
From: Alex Feinberg <feinb...@gmail.com>
Date: Wed, 16 Jun 2010 21:05:45 -0700
Local: Thurs, Jun 17 2010 12:05 am
Subject: Project Voldemort 0.81 released
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Hello all,

Project Voldemort 0.81 is out of the candidate stage and has been
released. You can get the release from
http://github.com/voldemort/voldemort/downloads

Additionally, you can browse the source code in the release-081 branch
on github: http://github.com/voldemort/voldemort/tree/release-081

Below are the release notes for this release, also viewable at
http://github.com/voldemort/voldemort/blob/release-081/release_notes.txt

Changes made since 0.80.2:

* IMPORTANT: we have upgraded the Hadoop Core jar to v0.20.2. Since
  this version of Hadoop requires Java 6, in order to retain backwards
  compatibility with Java 5, you will need to replace this jar with
  the Hadoop 0.18.* core jar.
* Multiple donors for Voldemort Rebalancing: speeds up rebalancing, by
  allowing a single stealer node to transfer partitions from multiple
  nodes
* Features for EC2 Testing
* Read-only Stores: backwards compatibility with 0.70, bug fix in
  Checksum code
* Hadoop InputFormat, Pig LoadFunc in Contrib: ability to perform
  Map/Reduce (either directly via Hadoop or using Pig) over data in
  Voldemort stores. See:
  < contrib/hadoop/test/voldemort/hadoop/VoldemortWordCount.java > for
  an example.
* Voldemort Performance Tool: performance measurement tool based on
  YCSB (Yahoo Cloud Serving Benchmark) code. Run
  < bin/voldemort-performance-tool.sh --help > for more information.
* Reverted default failure detector implementation back to
  BannagedPeriodFailureDetector due to potential bugs in the
  ThresholdFailureDetector

Thanks,
- Alex


 
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Jay Kreps  
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 More options Jun 17 2010, 1:37 am
From: Jay Kreps <jay.kr...@gmail.com>
Date: Wed, 16 Jun 2010 22:37:52 -0700
Local: Thurs, Jun 17 2010 1:37 am
Subject: Re: [project-voldemort] Project Voldemort 0.81 released
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Also, we are now requiring java 6. Which I imagine makes some people
inexplicably happy and others understandably sad. :-)

-Jay


 
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Alex Feinberg  
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 More options Jun 17 2010, 1:55 am
From: Alex Feinberg <feinb...@gmail.com>
Date: Wed, 16 Jun 2010 22:55:02 -0700
Local: Thurs, Jun 17 2010 1:55 am
Subject: Re: [project-voldemort] Project Voldemort 0.81 released
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As mentioned in the release notes, it's possible to use Java 5 (by
removing the Hadoop jars and/or replacing them with an older version
of Hadoop). Similarly, in the future, we'll also going to be using a
mainstream version of Avro as well, as opposed to a custom version of
Avro we've built for Java 5.

The project itself doesn't use any Java 6 language features (e.g.,
@Override on interfaces) or any Jdk6 libraries (e.g.,
ConcurrentSkipList) and I don't foresee this changing unless a killer
Java6/Jdk6 feature becomes applicable. The idea is "require Java 6 by
default, make it possible to run with Java 5 if needed, with the loss
or degradation of some features". We can consider this a "Libertarian
paternalistic" approach (
http://en.wikipedia.org/wiki/Libertarian_paternalism ) :-)

Thanks,
- Alex


 
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