| # News |
| <h2 class="news">Apache Mavibot 1.0.0-M8 released <em>posted on August 16th, 2015</em></h2> |
| |
| The Apache Directory team is pleased to announce the release of Apache Mavibot 1.0.0-M8 the |
| eighth milestone towards a 1.0 version. |
| |
| **Mavibot** is a Multi Version Concurrency Control (MVCC) BTree in Java. It is expected to be a |
| replacement for JDBM (The current backend for the **Apache Directory Server**), but could be a |
| good fit for any other project in need of a Java MVCC BTree implementation. |
| |
| This version contains support for free-page management. It is not yet production ready, support |
| for cross-B-tree transaction system is not present yet, and this will be our target for the next |
| release. |
| |
| Downloads are available [here](downloads.html) |
| |
| # News |
| <h2 class="news">Apache Mavibot 1.0.0-M7 released <em>posted on March 27th, 2015</em></h2> |
| |
| The Apache Directory team is pleased to announce the release of Apache Mavibot 1.0.0-M7 the seventh milestone towards a 1.0 version. |
| |
| **Mavibot** is a Multi Version Concurrency Control (MVCC) BTree in Java. It is expected to be a replacement for JDBM (The current backend for the **Apache Directory Server**), but could be a good fit for any other project in need of a Java MVCC BTree implementation. |
| |
| This version fixes some serious issues in the way we browse a B-tree, and in the transaction support. It's not yet |
| production ready, we still are missing the free-page management and a cross-B-tree transaction system, which will |
| be our target for the next release. |
| |
| Downloads are available [here](downloads.html) |
| |
| # News |
| <h2 class="news">Apache Mavibot 1.0.0-M6 released <em>posted on November 16th, 2014</em></h2> |
| |
| The Apache Directory team is pleased to announce the release of Apache Mavibot 1.0.0-M6, the sixth milestone towards a 1.0 version. |
| |
| **Mavibot** is a Multi Version Concurrency Control (MVCC) BTree in Java. It is expected to be a replacement for JDBM (The current backend for the **Apache Directory Server**), but could be a good fit for any other project in need of a Java MVCC BTree implementation. |
| |
| This version brings a complete support for Bulk-Loading of persistent btrees, and fixes a few bugs : |
| |
| * MAVIBOT-32 Add Bulk Load |
| * MAVIBOT-34 Support revisions |
| * MAVIBOT-36 Runtime dependencies on slf4j-log4j and log4j cause conflicts |
| * MAVIBOT-42 The TupleCursor always reuse the same internal tuple instance... |
| |
| |
| This is by far not the latest milestone |
| |
| **ApacheDS** has already been tested with **Mavibot 1.0.0-M6-SNAPSHOT** |
| |
| Downloads are available [here](downloads.html) |
| |
| # News |
| <h2 class="news">Apache Mavibot 1.0.0-M5 released <em>posted on July 4th, 2014</em></h2> |
| |
| The Apache Directory team is pleased to announce the release of Apache Mavibot 1.0.0-M5, the fifth milestone towards a 1.0 version. |
| |
| **Mavibot** is a Multi Version Concurrency Control (MVCC) BTree in Java. It is expected to be a replacement for JDBM (The current backend for the **Apache Directory Server**), but could be a good fit for any other project in need of a Java MVCC BTree implementation. |
| |
| This version brings some new improvements in the API and the performances. The In-memory and Persisted B-trees classes have |
| been moved into the same package, to avoid exposing the methods to the external world. We also have shared the common methods. |
| |
| We have added a partial support for the bulk-load feature, and a few speed improvements. |
| |
| This is by far not the latest milestone, the next one will bring major changes : revisions support, transaction support. |
| |
| **ApacheDS** has already been tested with **Mavibot 1.0.0-M5-SNAPSHOT** |
| |
| Downloads are available [here](downloads.html) |
| |
| # News |
| <h2 class="news">Apache Mavibot 1.0.0-M4 released <em>posted on March 13th, 2014</em></h2> |
| |
| The Apache Directory team is pleased to announce the release of Apache Mavibot 1.0.0-M4, the forth milestone towards a 1.0 version. |
| |
| **Mavibot** is a Multi Version Concurrency Control (MVCC) BTree in Java. It is expected to be a replacement for JDBM (The current backend for the **Apache Directory Server**), but could be a good fit for any other project in need of a Java MVCC BTree implementation. |
| |
| This version brings some new improvements in the API and the performances. The In-memory and Persisted B-trees classes have |
| been moved into the same package, to avoid exposing the methods to the external world. We also have shared the common methods. |
| |
| Some specific exceptions have been created. |
| |
| Here is the list of fixed issues : |
| |
| <b>Bug</b> |
| |
| * MAVIBOT-20 - Btree created with the duplicateValues flag to false still accept duplicate values |
| |
| </b>Improvements</b> |
| |
| * MAVIBOT-25 - Don't update the RMHeader for each free page we get |
| * MAVIBOT-27 - Aggregate the Persisted and InMemory common methods |
| * MAVIBOT-28 - Move the Persited and InMemory classes into the same package |
| * MAVIBOT-29 - Use a BtreeFactory to create BTrees |
| * MAVIBOT-30 - Replace the RuntimeException by specific exceptions |
| * MAVIBOT-33 - Serializer and comparator should be static instances |
| |
| |
| This is by far not the latest milestone, the next one will bring major changes : revisions support, transaction support. |
| |
| **ApacheDS** has already been tested with **Mavibot 1.0.-M4-SNAPSHOT** |
| |
| Downloads are available [here](downloads.html) |
| |
| <h2 class="news">Apache Mavibot 1.0.0-M3 released <em>posted on December 16th, 2013</em></h2> |
| |
| The Apache Directory team is pleased to announce the release of Apache Mavibot 1.0.0-M3, the third milestone towards a 1.0 version. |
| |
| **Mavibot** is a Multi Version Concurrency Control (MVCC) BTree in Java. It is expected to be a replacement for JDBM (The current backend for the **Apache Directory Server**), but could be a good fit for any other project in need of a Java MVCC BTree implementation. |
| |
| Some big refactoring in this milestone, as many of the classes and |
| interfaces are now comon to both the managed and in-memory btrees. |
| A replace method has been added, the cache is now shared with the |
| btree subtrees, and we don't create a subtrees for each values when |
| the BTree allows duplicate values, which leads to better performance. |
| |
| Most important, we don't anymore deserialize the whole page when it |
| is read from disk, we just deserialize the needed keys and values. |
| This single change boost the performance by an order of magnitude. |
| |
| The cursors have been refactored, and some tests have been added. |
| |
| Many other bugs have been fixed. |
| |
| **ApacheDS** has already been tested with **Mavibot 1.0.-M3-SNAPSHOT** |
| |
| Downloads are available [here](downloads.html) |
| |
| <h2 class="news">Apache Mavibot 1.0.0-M2 released <em>posted on November 6th, 2013</em></h2> |
| |
| The Apache Directory team is pleased to announce the release of Apache Mavibot 1.0.0-M2, the second milestone towards a 1.0 version. |
| |
| **Mavibot** is a Multi Version Concurrency Control (MVCC) BTree in Java. It is expected to be a replacement for JDBM (The current backend for the **Apache Directory Server**), but could be a good fit for any other project in need of a Java MVCC BTree implementation. |
| This milestone contains two different BTrees : |
| * one for in-memory BTrees |
| * one for managed BTrees |
| |
| The rational for this big modification is that we can't easily have one BTree to gather all the characteristics of both the in-memory and the managed BTrees with oe single class. |
| |
| We also have rewrote the way we handle added elements when we reach the end of the memory : we now use a cache instead of depending on wekReferences, which proved to be just way too slow. |
| |
| The next milestones will add the missing features : |
| |
| * bulk load support |
| * multi-version support with free pages management |
| * transaction support |
| |
| **ApacheDS** has already been tested with **Mavibot 1.0.-M2-SNAPSHOT**, and it offers performances twice better than JDBM. |
| |
| Downloads are available [here](downloads.html) |
| |
| <h2 class="news">Apache Mavibot 1.0.0-M1 released <em>posted on August 6th, 2013</em></h2> |
| |
| The Apache Directory team is pleased to announce the release of Apache Mavibot 1.0.0-M1, the first milestone towards a 1.0 version. |
| |
| **Mavibot** is a Multi Version Concurrency Control (MVCC) BTree in Java. It is expected to be a replacement for JDBM (The current backend for the **Apache Directory Server**), but could be a good fit for any other project in need of a Java MVCC BTree implementation. |
| |
| This milestone is the first step toward a complete MVCC implementation, it currently does not handle versions at all. Anyway, it's already a in memory/On disk full BTree implementation, which is 2 to 3 times faster than JDBM. |
| |
| The next milestones will add the missing features : |
| |
| * bulk load support |
| * multi-version support with free pages management |
| * transaction support |
| |
| **ApacheDS** has already been tested with **Mavibot 1.0.-M1-SNAPSHOT**, and it offers pretty good performances compared to JDBM, except when we inject a lot of entries in the server. |
| |
| Downloads are available [here](downloads.html) |
| |
| |
| <h2 class="news">Apache Mavibot added to Apache Directory project <em>posted on August 6th, 2013</em></h2> |
| |
| We are proud to announce that after less than one year of development in Apache Directory Labs, the Mavibot project has been accepted as a Apache Directory subproject. |
| |
| The project is still in its infancy, and anyone willing to participate in the effort is very welcome ! |