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new b518d8c Updated site at revision d06fad2
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commit b518d8c58dda1b2530894ce0bb5e810f6c51ed46
Author: jenkins <[email protected]>
AuthorDate: Fri Jan 26 19:14:10 2018 +0000
Updated site at revision d06fad2
---
.../index.html | 339 +++++++++++++++++++++
content/community/bookkeeper_proposals/index.html | 6 +-
2 files changed, 344 insertions(+), 1 deletion(-)
diff --git a/content/bps/BP-26-move-distributedlog-core-library/index.html
b/content/bps/BP-26-move-distributedlog-core-library/index.html
new file mode 100644
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--- /dev/null
+++ b/content/bps/BP-26-move-distributedlog-core-library/index.html
@@ -0,0 +1,339 @@
+<!DOCTYPE html>
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+ <h1 class="title">BP-26: Move distributedlog library as part of
bookkeeper</h1>
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+
+ </nav>
+
+
+ </header>
+
+ <hr />
+
+ <div class="content is-medium">
+ <section class="bk-community-content">
+ <h3 id="motivation">Motivation</h3>
+
+<p>DistributedLog is an extension of Apache BookKeeper, which offers
<em>reopenable</em> log streams as its storage primitives.
+It is tightly built over bookkeeper ledgers, and provides an easier-to-use
abstraction and api to use. Applications
+can use <em>named</em> log streams rather than <em>numbered</em> ledgers to
store their data. For example, users can use log streams
+as files to storge objects, checkpoints and other more general filesystem
related use cases.</p>
+
+<p>Moving the distributedlog core library as part of bookkeeper would have
following benefits:</p>
+
+<ul>
+ <li>It provides more generic “reopenable” log abstraction. It lowers the
barrier for people to use bookkeeper to store
+data, and bring in more use cases into bookkeeper ecosystem.</li>
+ <li>Using ledgers to build continous log stream has been a pattern that been
reimplemented multiple times at multiple places,
+from older projects like HDFS namenode log manager, Hedwig to the newer
projects like DistributedLog and Pulsar.</li>
+ <li>Most of the distributedlog usage is using the distributedlog library
which only depends Apache BookKeeper and there is no
+additional components introduced. To simplify those usages, it is better to
release distributedlog library along with
+bookkeeper. It provides a better integration and release procedure.</li>
+</ul>
+
+<p>This proposal proposes “moving the distributedlog library code base as part
of bookkeeper and continuing the library
+development in bookkeeper”.</p>
+
+<h3 id="public-interfaces">Public Interfaces</h3>
+
+<p>This is a new library moved in bookkeeper. It will <em>NOT</em> touch any
existing bookkeeper modules and ledger api.</p>
+
+<h3 id="proposed-changes">Proposed Changes</h3>
+
+<p>This proposal will <em>ONLY</em> move following library-only modules from
distributedlog repo:</p>
+
+<ul>
+ <li>distributedlog-core: the log stream library that build over bookkeeper
ledgr api. It doesn’t introduce any service components. Library only.</li>
+ <li>distributedlog-io/dlfs: A hdfs filesystem api wrapper over the log
stream api, to provide filesystem-like usage over bookkeeper.</li>
+</ul>
+
+<p>This proposal will <em>NOT</em> move other service components like
“distributedlog-proxy”.</p>
+
+<p>The steps to make this change are described as following:</p>
+
+<ul>
+ <li>the proposed modules (<code
class="highlighter-rouge">distributedlog-core</code> and <code
class="highlighter-rouge">distributedlog-io/dlfs</code>) will be moved under
<code class="highlighter-rouge">stream/distributedlog</code> directory at
apache bookkeeper repo.</li>
+ <li>a new “stream” profile will be added to the root <code
class="highlighter-rouge">pom.xml</code> file. The distributedlog module will
only be build when “-Pstream” is specified
+in the maven build command. This allows users who only use ledger api skip
building distributedlog module.</li>
+ <li>the distributedlog api, javadoc api and some tutorials will be
integrated with current bookkeeper website to provide integrated experiences
+when users browse bookkeeper website.</li>
+</ul>
+
+<h3 id="compatibility-deprecation-and-migration-plan">Compatibility,
Deprecation, and Migration Plan</h3>
+
+<p>This doesn’t change existing modules or api. so no compatibility,
deprecation and migration plan for bookkeeper users.</p>
+
+<p>For distributedlog users, the distributedlog library will begin release
under groupId <code class="highlighter-rouge">org.apache.bookkeeper</code>
instead of <code class="highlighter-rouge">org.apache.distributedlog</code>.
+API documentation will be updated to reflect this.</p>
+
+<h3 id="test-plan">Test Plan</h3>
+
+<p>N/A</p>
+
+<h3 id="rejected-alternatives">Rejected Alternatives</h3>
+
+<p>N/A</p>
+
+ </section>
+
+
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diff --git a/content/community/bookkeeper_proposals/index.html
b/content/community/bookkeeper_proposals/index.html
index 8c31cce..a62cc52 100644
--- a/content/community/bookkeeper_proposals/index.html
+++ b/content/community/bookkeeper_proposals/index.html
@@ -347,7 +347,7 @@ of the thread is of the format <code
class="highlighter-rouge">[DISCUSS] BP-<
<p>This section lists all the <em>bookkeeper proposals</em> made to
BookKeeper.</p>
-<p><em>Next Proposal Number: 26</em></p>
+<p><em>Next Proposal Number: 27</em></p>
<h3 id="inprogress">Inprogress</h3>
@@ -383,6 +383,10 @@ of the thread is of the format <code
class="highlighter-rouge">[DISCUSS] BP-<
<td style="text-align: left"><a
href="https://cwiki.apache.org/confluence/display/BOOKKEEPER/BP-18%3A+LedgerType%2C+Flags+and+StorageHints";>BP-18:
LedgerType, Flags and StorageHints</a></td>
<td style="text-align: left">Accepted</td>
</tr>
+ <tr>
+ <td style="text-align: left"><a
href="../../bps/BP-26-move-distributedlog-core-library">BP-26: Move
distributedlog library as part of bookkeeper</a></td>
+ <td style="text-align: left">Accepted</td>
+ </tr>
</tbody>
</table>
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