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| <h1 class="title">Apache BookKeeper 4.9.0 Release Notes</h1> |
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| <p>This is the 16th release of Apache BookKeeper!</p> |
| |
| <p>The 4.9.0 release incorporates hundreds of bug fixes, improvements, and features since previous major release, 4.8.0, |
| which was released four months ago. It is a new milestone in Apache BookKeeper community.</p> |
| |
| <p>Apache BookKeeper/DistributedLog users are encouraged to <a href="../../admin/upgrade">upgrade to 4.9.0</a>. The technical details of |
| this release are summarized below.</p> |
| |
| <h2 id="highlights">Highlights</h2> |
| |
| <p>The main features in 4.9.0 cover are around following areas:</p> |
| |
| <ul> |
| <li>Dependencies Changes</li> |
| <li>Public API</li> |
| <li>Configuration</li> |
| <li>Metadata</li> |
| <li>Table Service</li> |
| <li>Operations</li> |
| <li>Builds & Testing</li> |
| <li>Enhancements</li> |
| <li>Bug Fixes</li> |
| </ul> |
| |
| <h3 id="dependencies-changes">Dependencies Changes</h3> |
| |
| <p>Here is a list of dependencies changed in 4.9.0:</p> |
| |
| <ul> |
| <li>Upgrade <a href="http://fasterxml.com/">Jackson</a> from <code class="highlighter-rouge">2.8.9</code> to <code class="highlighter-rouge">2.9.7</code>.</li> |
| <li>Upgrade <a href="https://jline.github.io/">Jline</a> to <code class="highlighter-rouge">2.11</code>.</li> |
| <li>Upgrade <a href="https://netty.io/">Netty</a> from <code class="highlighter-rouge">4.1.22</code> to <code class="highlighter-rouge">4.1.31</code>.</li> |
| <li>Upgrade <a href="https://www.testcontainers.org/">TestContainers</a> from <code class="highlighter-rouge">1.7.0</code> to <code class="highlighter-rouge">1.8.3</code>.</li> |
| </ul> |
| |
| <h3 id="public-api">Public API</h3> |
| |
| <p>There are multiple new client features introduced in 4.9.0. Here are two highlighted features:</p> |
| |
| <ul> |
| <li>LedgerHandleAdv exposes <code class="highlighter-rouge">asyncAddEntry</code> variant that takes ByteBuf</li> |
| </ul> |
| |
| <h3 id="configuration">Configuration</h3> |
| |
| <p>There are bunch of new settings introduced in both bookie and client in 4.9.0. Here are those settings:</p> |
| |
| <h4 id="bookie">Bookie</h4> |
| |
| <ul> |
| <li><code class="highlighter-rouge">serverNumIOThreads</code>: configures the number of IO threads for bookies |
| (see <a href="https://github.com/apache/bookkeeper/pull/1612">#1612</a>)</li> |
| <li>The default value of <code class="highlighter-rouge">fileInfoFormatVersionToWrite</code> is bumped from <code class="highlighter-rouge">0</code> to <code class="highlighter-rouge">1</code>. |
| (see <a href="https://github.com/apache/bookkeeper/pull/1689">#1689</a>)</li> |
| <li>The default value of <code class="highlighter-rouge">journalFormatVersionToWrite</code> is bumped from <code class="highlighter-rouge">5</code> to <code class="highlighter-rouge">6</code>. |
| (see <a href="https://github.com/apache/bookkeeper/pull/1689">#1689</a>)</li> |
| </ul> |
| |
| <h4 id="client">Client</h4> |
| |
| <ul> |
| <li><code class="highlighter-rouge">numIOThreads</code>: configures the number of IO threads for client |
| (see <a href="https://github.com/apache/bookkeeper/pull/1612">#1612</a>)</li> |
| </ul> |
| |
| <h3 id="metadata">Metadata</h3> |
| |
| <p>There are a few big changes around metadata in 4.9.0. They are:</p> |
| |
| <ul> |
| <li>Refactor ledger metadata in LedgerHandle to make ledger metadata instance immutable (see <a href="https://github.com/apache/bookkeeper/issues/281">#281</a>)</li> |
| <li>Store ledger metadata in binary protobuf format (see details at <a href="https://github.com/apache/bookkeeper/issues/723">#723</a>)</li> |
| <li>Etcd based metadata driver implementation is in BETA release (see details at <a href="https://github.com/apache/bookkeeper/issues/1639">#1639</a>)</li> |
| </ul> |
| |
| <p>Additionally, there are bunch of new interfaces introduced in the metadata driver API.</p> |
| |
| <ul> |
| <li><a href="https://github.com/apache/bookkeeper/pull/1619">Issue #1619: Provide async version of markLedgerUnderreplicated for LedgerUnderreplicationManager</a></li> |
| </ul> |
| |
| <h3 id="table-service">Table Service</h3> |
| |
| <p>There are a lot of improvements and features introduced into the table service. The maturity of table service is moving from alpha to beta, |
| and has started to be used as the state storage for Pulsar Functions. More table service usage will come in Pulsar’s future releases.</p> |
| |
| <p>Starting from 4.9.0, bookkeeper will release a python client for table service. See details at <a href="https://github.com/apache/bookkeeper/pull/1691">#1691</a></p> |
| |
| <h3 id="operations">Operations</h3> |
| |
| <h4 id="http-admin-rest-endpoint">HTTP Admin REST Endpoint</h4> |
| |
| <ul> |
| <li><code class="highlighter-rouge">/api/v1/bookie/gc_details</code> is introduced to retrieve the GC details.</li> |
| <li><code class="highlighter-rouge">/api/v1/bookie/gc</code> is introduced to trigger GC through HTTP REST endpoint.</li> |
| </ul> |
| |
| <h4 id="bookieshell">BookieShell</h4> |
| |
| <p>There are are multiple new commands are added in BookieShell. Here are a few highlighted:</p> |
| |
| <ul> |
| <li><code class="highlighter-rouge">regenerate-interleaved-storage-index-file</code> command is introduced for rebuilding the index files for interleaved based ledger storage. (<a href="https://github.com/apache/bookkeeper/pull/1642">#1642</a>)</li> |
| <li><code class="highlighter-rouge">ledgermetadata</code> command now supports dumping/restoring ledger metadata to/from file.</li> |
| <li><code class="highlighter-rouge">localconsistencycheck</code> command is introduce for running consistency check on bookies locally. (<a href="https://github.com/apache/bookkeeper/pull/1819">#1819</a>)</li> |
| <li>a new <code class="highlighter-rouge">bk-perf</code> script is introduced for running performance benchmark on bookkeeper. (<a href="https://github.com/apache/bookkeeper/pull/1697">1697</a>)</li> |
| </ul> |
| |
| <p>A new BookKeeper CLI package is released as <code class="highlighter-rouge">bkctl</code>. This <code class="highlighter-rouge">bkctl</code> package includes both the existing bookie shell and the new <code class="highlighter-rouge">bkctl</code> tool.</p> |
| |
| <h4 id="mdc">MDC</h4> |
| |
| <p>Mapped Diagnostic Context (MDC) is now supported at both bookie and client sides. Application request context can be passed as context |
| and being logged through slf4j/log4j. This simplifies throubleshooting of request-level failures/errors. See details at <a href="https://github.com/apache/bookkeeper/pull/1672">#1672</a>.</p> |
| |
| <h4 id="stats-annotation">Stats Annotation</h4> |
| |
| <p><code class="highlighter-rouge">StatsDoc</code> annotation is introduced in <a href="https://github.com/apache/bookkeeper/pull/1786">BP-36</a>. The <code class="highlighter-rouge">StatsDoc</code> annotation is |
| used for documenting stats added across the project.</p> |
| |
| <h3 id="builds--testing">Builds & Testing</h3> |
| |
| <ul> |
| <li>Java 11 is supported for building bookkeeper.</li> |
| </ul> |
| |
| <h3 id="enhancements">Enhancements</h3> |
| |
| <ul> |
| <li><a href="https://github.com/apache/bookkeeper/pull/1792">Issue 1791: Read Submission should bypass OSE Threads</a></li> |
| <li>A new module is introduced for enabling CPU affinity <a href="https://github.com/apache/bookkeeper/pull/1641">#1641</a></li> |
| <li><a href="https://github.com/apache/bookkeeper/pull/1682">Issue 1682: Added BlockingQueue implementation based on JCtools</a></li> |
| <li><a href="https://github.com/apache/bookkeeper/pull/1813">Issue 1813: Set default sizes of DbLedgerStorage read and write cache to be proportional to JVM direct memory</a></li> |
| <li><a href="https://github.com/apache/bookkeeper/pull/1808">Issue 1808: Allow to configure sticky reads</a></li> |
| <li><a href="https://github.com/apache/bookkeeper/pull/1754">Issue 1754: Netty allocator wrapper</a></li> |
| </ul> |
| |
| <h3 id="bug-fixes">Bug Fixes</h3> |
| |
| <h4 id="bookie-1">Bookie</h4> |
| |
| <ul> |
| <li><a href="https://github.com/apache/bookkeeper/pull/1414">Issue #1414: Ensure BufferedChannel instance is properly closed</a></li> |
| <li><a href="https://github.com/apache/bookkeeper/pull/1805">Issue #1805: Fixed Auth with V2 protocol</a></li> |
| <li><a href="https://github.com/apache/bookkeeper/pull/1769">Issue #1769: prevent race between flush and delete from recreating index</a></li> |
| <li><a href="https://github.com/apache/bookkeeper/pull/1807">Issue #1807: Fix sorted ledger storage rotating entry log files too frequent</a></li> |
| <li><a href="https://github.com/apache/bookkeeper/pull/1843">Issue #1843: DbLedgerStorage should do periodical flush</a></li> |
| </ul> |
| |
| <h4 id="autorecovery">AutoRecovery</h4> |
| |
| <ul> |
| <li><a href="https://github.com/apache/bookkeeper/pull/1608">Issue #1578: Fixed deadlock in auditor blocking ZK thread</a></li> |
| <li><a href="https://github.com/apache/bookkeeper/pull/1834">Issue #1834: Only publish suspect ledgers if they have missing fragments</a></li> |
| </ul> |
| |
| <h4 id="client-1">Client</h4> |
| |
| <ul> |
| <li><a href="https://github.com/apache/bookkeeper/pull/1762">Issue #1762: Don’t cache Bookie hostname DNS resolution forever</a></li> |
| <li><a href="https://github.com/apache/bookkeeper/pull/1788">Issue #1788: Fix bugs in DefaultEnsemblePlacementPolicy</a></li> |
| <li><a href="https://github.com/apache/bookkeeper/pull/1862">Issue #1862: Fix selectFromNetworkLocation in RackawareEnsemblePlacementPolicyImpl</a></li> |
| <li><a href="https://github.com/apache/bookkeeper/pull/1857">Issue #1857: changingEnsemble should be negated before calling unset success</a></li> |
| </ul> |
| |
| <h2 id="full-list-of-changes">Full list of changes</h2> |
| |
| <ul> |
| <li><a href="https://github.com/apache/bookkeeper/milestone/5?closed=1">https://github.com/apache/bookkeeper/milestone/5</a></li> |
| </ul> |
| |
| </section> |
| |
| |
| </div> |
| </div> |
| |
| <div class="column is-2 is-hidden-mobile"> |
| |
| |
| <div class="toc"> |
| <h2 class="title">Apache BookKeeper 4.9.0 Release Notes</h2> |
| <ul class="section-nav"> |
| <li class="toc-entry toc-h2"><a href="#highlights">Highlights</a> |
| <ul> |
| <li class="toc-entry toc-h3"><a href="#dependencies-changes">Dependencies Changes</a></li> |
| <li class="toc-entry toc-h3"><a href="#public-api">Public API</a></li> |
| <li class="toc-entry toc-h3"><a href="#configuration">Configuration</a> |
| <ul> |
| <li class="toc-entry toc-h4"><a href="#bookie">Bookie</a></li> |
| <li class="toc-entry toc-h4"><a href="#client">Client</a></li> |
| </ul> |
| </li> |
| <li class="toc-entry toc-h3"><a href="#metadata">Metadata</a></li> |
| <li class="toc-entry toc-h3"><a href="#table-service">Table Service</a></li> |
| <li class="toc-entry toc-h3"><a href="#operations">Operations</a> |
| <ul> |
| <li class="toc-entry toc-h4"><a href="#http-admin-rest-endpoint">HTTP Admin REST Endpoint</a></li> |
| <li class="toc-entry toc-h4"><a href="#bookieshell">BookieShell</a></li> |
| <li class="toc-entry toc-h4"><a href="#mdc">MDC</a></li> |
| <li class="toc-entry toc-h4"><a href="#stats-annotation">Stats Annotation</a></li> |
| </ul> |
| </li> |
| <li class="toc-entry toc-h3"><a href="#builds--testing">Builds & Testing</a></li> |
| <li class="toc-entry toc-h3"><a href="#enhancements">Enhancements</a></li> |
| <li class="toc-entry toc-h3"><a href="#bug-fixes">Bug Fixes</a> |
| <ul> |
| <li class="toc-entry toc-h4"><a href="#bookie-1">Bookie</a></li> |
| <li class="toc-entry toc-h4"><a href="#autorecovery">AutoRecovery</a></li> |
| <li class="toc-entry toc-h4"><a href="#client-1">Client</a></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| <li class="toc-entry toc-h2"><a href="#full-list-of-changes">Full list of changes</a></li> |
| </ul> |
| </div> |
| |
| |
| |
| </div> |
| </div> |
| </div> |
| |
| |
| |
| <div id="entry-popover-html" class="popover-template"> |
| <p>An entry is a sequence of bytes (plus some metadata) written to a BookKeeper ledger. Entries are also known as records.</p> |
| |
| </div> |
| |
| <div id="ledger-popover-html" class="popover-template"> |
| <p>A ledger is a sequence of entries written to BookKeeper. Entries are written sequentially to ledgers and at most once, giving ledgers append-only semantics.</p> |
| |
| </div> |
| |
| <div id="bookie-popover-html" class="popover-template"> |
| <p>A bookie is an individual BookKeeper storage server.</p> |
| |
| <p>Bookies store the content of ledgers and act as a distributed ensemble.</p> |
| |
| </div> |
| |
| <div id="rereplication-popover-html" class="popover-template"> |
| <p>A subsystem that runs in the background on bookies to ensure that ledgers are fully replicated even if one bookie from the ensemble is down.</p> |
| |
| </div> |
| |
| <div id="striping-popover-html" class="popover-template"> |
| <p>Striping is the process of distributing BookKeeper ledgers to sub-groups of bookies rather than to all bookies in a BookKeeper ensemble.</p> |
| |
| <p>Striping is essential to ensuring fast performance.</p> |
| |
| </div> |
| |
| <div id="striped-popover-html" class="popover-template"> |
| <p>Striping is the process of distributing BookKeeper ledgers to sub-groups of bookies rather than to all bookies in a BookKeeper ensemble.</p> |
| |
| <p>Striping is essential to ensuring fast performance.</p> |
| |
| </div> |
| |
| <div id="journal-popover-html" class="popover-template"> |
| <p>A journal file stores BookKeeper transaction logs.</p> |
| |
| </div> |
| |
| <div id="fencing-popover-html" class="popover-template"> |
| <p>When a reader forces a ledger to close, preventing any further entries from being written to the ledger.</p> |
| |
| </div> |
| |
| <div id="record-popover-html" class="popover-template"> |
| <p>A record is a sequence of bytes (plus some metadata) written to a BookKeeper ledger. Records are also known as entries.</p> |
| |
| </div> |
| |
| |
| <script type="text/javascript"> |
| |
| tippy('#entry-popover', { |
| html: '#entry-popover-html', |
| arrow: true, |
| animation: 'fade' |
| }); |
| |
| tippy('#ledger-popover', { |
| html: '#ledger-popover-html', |
| arrow: true, |
| animation: 'fade' |
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| |
| tippy('#bookie-popover', { |
| html: '#bookie-popover-html', |
| arrow: true, |
| animation: 'fade' |
| }); |
| |
| tippy('#rereplication-popover', { |
| html: '#rereplication-popover-html', |
| arrow: true, |
| animation: 'fade' |
| }); |
| |
| tippy('#striping-popover', { |
| html: '#striping-popover-html', |
| arrow: true, |
| animation: 'fade' |
| }); |
| |
| tippy('#striped-popover', { |
| html: '#striped-popover-html', |
| arrow: true, |
| animation: 'fade' |
| }); |
| |
| tippy('#journal-popover', { |
| html: '#journal-popover-html', |
| arrow: true, |
| animation: 'fade' |
| }); |
| |
| tippy('#fencing-popover', { |
| html: '#fencing-popover-html', |
| arrow: true, |
| animation: 'fade' |
| }); |
| |
| tippy('#record-popover', { |
| html: '#record-popover-html', |
| arrow: true, |
| animation: 'fade' |
| }); |
| |
| </script> |
| |
| </main> |
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| <div class="container"> |
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| <p> |
| Copyright © 2016 - 2021 <a href="https://www.apache.org/">The Apache Software Foundation</a>,<br /> licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, version 2.0</a>. |
| </p> |
| <p> |
| Apache BookKeeper, BookKeeper®, Apache®, the Apache feature logo, and the Apache BookKeeper logo are either registered trademarks or trademarks of The Apache Software Foundation. |
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