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From "">
Subject Re: [VOTE] accept DirectMemory as new Apache Incubator podling
Date Sun, 02 Oct 2011 09:02:49 GMT
+1 (binding)

Jean-Baptiste Onofré
Talend -

----- Reply message -----
From: "Simone Tripodi" <>
To: <>
Subject: [VOTE] accept DirectMemory as new Apache Incubator podling
Date: Sun, Oct 2, 2011 9:36 am

Hi all guys,

I'm now calling a formal VOTE on the DirectMemory proposal located here:

Proposal text copied at the bottom of this email.

VOTE close on Tuesday, October 4, early 7:30 AM CET.

Please VOTE:

[ ] +1 Accept DirectMemory into the Apache Incubator
[ ] +0 Don't care
[ ] -1  Don't Accept DirectMemory into the Apache Incubator because...

Thanks in advance for participating!

All the best, have a nice day,

P.S. Here's my +1

= DirectMemory =

== Abstract ==
The following proposal is about Apache !DirectMemory, a Java
!OpenSource multi-layered cache implementation featuring off-heap
memory storage (a-la Terracotta !BigMemory) to enable caching of Java
objects without degrading JVM performance

== Proposal ==
!DirectMemory's main purpose is to to act as a second level cache
(after a heap based one) able to store large amounts of data without
filling up the Java heap and thus avoiding long garbage collection
cycles. Although serialization has a runtime cost store/retrieve
operations are in the sub-millisecond range being pretty acceptable in
every usage scenario even as a first level cache and, most of all,
outperforms heap storage when the count of the entries goes over a
certain amount. !DirectMemory implements cache eviction based on a
simple LFU (Least Frequently Used) algorythm and also on item
expiration. Included in the box is a small set of utility classes to
easily handle off-heap memory buffers.

== Background ==
!DirectMemory is a project was born in the 2010 thanks to Raffaele P.
Guidi initial effort under
[[!DirectMemory/|GitHub]] and already
licensed under the Apache License 2.0.

== Rationale ==
The rationale behind !DirectMemory is bringing off-heap caching to the
open source world, empowering FOSS developers and products with a tool
that enables breaking the heap barrier and override the JVM garbage
collection mechanism collection - which could be useful in scenarios
where RAM needs are over the usual limits (more than 8, 12, 24gb) and
to ease usage of off-heap memory in general

= Current Status =

== Meritocracy ==
As a majority of the initial project members are existing ASF
committers, we recognize the desirability of running the project as a
meritocracy.  We are eager to engage other members of the community
and operate to the standard of meritocracy that Apache emphasizes; we
believe this is the most effective method of growing our community and
enabling widespread adoption.

== Core Developers ==
In alphabetical order:

 * Christian Grobmeier <grobmeier at apache dot org>
 * Maurizio Cucchiara <mcucchiara at apache dot org>
 * Olivier Lamy <olamy at apache dot org>
 * Raffaele P. Guidi <raffaele dot p dot guidi at gmail dot com>
 * Simone Gianni <simoneg at apache dot org>
 * Simone Tripodi <simonetripodi at apache dot org>
 * Tommaso Teofili <tommaso at apache dot org>

== Alignment ==
The purpose of the project is to develop and maintain !DirectMemory
implementation that can be used by other Apache projects.

= Known Risks =
== Orphaned Products ==
!DirectMemory does not have any reported production usage, yet, but is
getting traction with developers and being evaluated by potential
users and thus the risks of it being orphaned are minimal

== Inexperience with Open Source ==
All of the committers have experience working in one or more open
source projects inside and outside ASF.

== Homogeneous Developers ==
The list of initial committers are geographically distributed across
the Europe with no one company being associated with a majority of the
developers.  Many of these initial developers are experienced Apache
committers already and all are experienced with working in distributed
development communities.

== Reliance on Salaried Developers ==
To the best of our knowledge, none of the initial committers are being
paid to develop code for this project.

== Relationships with Other Apache Products ==
!DirectMemory fits naturally in the ASF because it could be
successfully employed together with a large number of ASF products
ranging from JCS - as a new cache region between the heap and indexed
file ones, to ORM systems like Cayenne (i.e. replacing current OSCache
based implementation), Apache JDO and JPA implementations and also
java based databases (i.e. Derby) and all systems managing large
amounts of data from Hadoop to Cassandra

== A Excessive Fascination with the Apache Brand ==
While the Apache Software Foundation would be a good home for the
!DirectMemory project it already has some traction and it could live
on its own - however we see reciprocal benefits for both the ASF and
the project in adopting the brand to better reach the community

= Documentation =
 1. [[|The original
DirectMemory HomePage]]
 2. [[|The original
DirectMemory Wiki]]
 3. [[|The
DirectMemory Issue Tracker (used also for enhancements, feature
requests and discussion)]]

= Initial Source =
The intial source comprises code developed on
[[|GitHub]] contributed
under Grant from Raffaele P. Guidi for Directmemory.

= Source and Intellectual Property Submission Plan =
Source code will be moved from
[[|GitHub]] space inside
the SVN space of the podling.

= External Dependencies =
 * Google Guava collections - - Apache License V2.0
 * Protostuff - - Apache License V2.0
 * JoSQL - - Apache License V2.0
 * AspectJ - - Eclipse Public License
(Category B, used only in binary form)
 * SLF4J - - MIT License (Category A)
 * Logback - - dual licensed under EPL v1.0 and
LGPL 2.1 (Category B, but not really a dependency as it is astracted
by the SLF4j facade)
'''Build/Test time dependencies'''
 * Maven - - Apache License V2.0
 * JUnit - - CPL License v1.0 - (Category B,
used only in binary form)
 * JUnit Benchmarks - - Apache License

= Cryptography =
The project does not handle cryptography in any way.

= Required Resources =
 * Mailing lists
  * directmemory-private (with moderated subscriptions)
  * directmemory-dev
  * directmemory-user
  * directmemory-commits
 * Subversion directory
 * Website
  * Wiki (!DirectMemory)
 * Issue Tracking
  * JIRA (!DirectMemory)

= Initial Committers =
Names of initial committers - in alphabetical order - with current ASF status:

 * Christian Grobmeier <grobmeier at apache dot org> (ASF Member)
 * Ioannis Canellos <iocanel at apache dor org> (ASF Committer)
 * Maurizio Cucchiara <mcucchiara at apache dot org> (ASF Committer)
 * Olivier Lamy <olamy at apache dot org> (ASF Member)
 * Raffaele P. Guidi <raffaele dot p dot guidi at gmail dot com> (ICLA Signed)
 * Simone Gianni <simoneg at apache dot org> (ASF Member)
 * Simone Tripodi <simonetripodi at apache dot org> (ASF Member)
 * Tommaso Teofili <tommaso at apache dot org> (ASF Member)

= Sponsors =
== Champion ==
 * Christian Grobmeier <grobmeier at apache dot org>

== Nominated Mentors ==
 * Anthony Elder <antelder at apache dor org>
 * Christian Grobmeier <grobmeier at apache dot org>
 * Olivier Lamy <olamy at apache dot org>
 * Sylvain Wallez <sylvain at apache dot org>
 * Tim Williams <twilliams at apache dot org>

== Sponsoring Entity ==
 * The Apache Incubator

= Other interested people (in alphabetical order) =
 * TBD

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