发布于 2015-04-17 22:20:43 | 209 次阅读 | 评论: 0 | 来源: 网友投递
OrientDB基于Java的文档数据库
OrientDB是兼具文挡数据库的灵活性和图形数据库管理链接能力的可深层次扩展的文档-图形数据库管理系统(NoSQL数据库)。可选无模式、全模式或混合模式下。支持许多高级特性,诸如ACID事务、快速索引,原生和SQL查询功能。可以JSON格式导入、导出文档。若不执行昂贵的JOIN操作的话,如同关系数据库可在几毫秒内可检索数以百记的链接文档图。
OrientDB 2.1-rc1 发布,此版本解决了 104 个 issues,主要更新内容如下:
Schema:
Support for Multiple inheritance where classes can extend from multiple super classes
Support for default values (functions are allowed)
Core:
Improved WAL management (Journal) to enforce Consistency with transactions
Fetch-plan supports wildcard for names
SQL:
New SQL parser by default on with new databases and off with those created with old versions
Prepared Statements and substitution of parameters and target
New Live Query to write Reactive applications
New optimization about using of indexes in sub-classes if present
New concat() function
Distributed:
Support for slave (read-only) nodes
Included Hazelcast-all.jar including also Cloud support
ETL:
Skip duplicated vertices
Bug fixing: 104 issues in total
此版本现已提供下载:
https://github.com/orientechnologies/orientdb/archive/2.1-rc1.zip
OrientDB是兼具文挡数据库的灵活性和图形数据库管理链接能力的可深层次扩展的文档-图形数据库管理系统(NoSQL数据库)。可选无模式、全模式或混合模式下。支持许多高级特性,诸如ACID事务、快速索引,原生和SQL查询功能。可以JSON格式导入、导出文档。若不执行昂贵的JOIN操作的话,如同关系数据库可在几毫秒内可检索数以百记的链接文档图。