Java NoSQL数据库, OrientDB 2.0 正式发布
OrientDB是一个NoSQL数据库管理系统,在普通硬件上每秒可以存储15万份文档。它是一个基于文档的数据库,关系在图形数据库中管理,与记录之间直接连接。你可以在几毫秒内遍历树和图的记录的全部或部分。它支持 schema-less, schema-full, 和schema-mixed 模式,具有一个基于用户和角色,很强的安全性分析系统。支持SQL查询语言。
OrientDB 2.0 正式发布,可用于生产环境!
OrientDB 2.0 比 OrientDB 1.7 更快(很多用户都注意到有 40% 的性能提升),特别是在多个服务器分布式使用的时候,性能提升很大。OrientDB 使用新的二进制协议压缩,数据库大小占用文件系统的空间更少,I/O 吞吐量更高!
改进记录:
Core
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Avoids rebuilding of indexes if working in Transactional mode
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New Schema Driver Serialization avoids writing field names for records with Schema resulting in 20% performance improvement
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New RW-Locks to speed-up internal parallelism
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In-Memory database uses off-heap cache now
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Disabled SNAPPY compression by default
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Improved schema concurrency using immutable instances
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Added strategies to manage conflict: by content and auto-merge. Furthermore can be injected custom strategy via Java API
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Cache, removed 2nd level cache and improved 1st level cache
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Cluster selection strategy now can decide on the input document content
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Clusters can be detached (offline) and re-attached (online)
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Better automatic allocation of Heap and Disk-Cache
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Fetch-Plan: support for wildcards
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Using SIGTRAP (kill -5) to dump OrientDB information
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Logged database name on server and embedded messages
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Removed a couple of internal layers on Document API to speedup and simplify implementation. Added also ODocument.fromMap() and ODocument.toMap()
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Merged in core commons and native-os modules
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On first run, the server asks for the root password. Blank means auto-generate (like before)
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Global settings are copied in database at creation time and can be update
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Lucene plugin for Full-Text and Spatial indexes is now in bundle with default distribution
### Distributed
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3x performance improvement
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New asynchronous replication
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On first run, ask for node name. Blank means auto-generate (like before)
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Unified script and config files with stand-alone server
### Javascript
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Invoking of JS functions is now 10x faster due to caching of the JVM Script engine
### Network
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Support for stateless requests using Token
### Graph API
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Disabled light-weight edges by default
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New OGraphBatchInsertBasic and OGraphBatchInsert API for massive insertion on graphs: 13x faster than Blueprints
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New SQL MOVE VERTEX command to refactor portion of graphs and to move vertices between distributed nodes
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Improved OrientGraphFactory performance reducing recycling time. Added central config of generated graphs in Factory
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Creation of edges can be set to avoid updating both vertices
### Security
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Added configurable SSL to HTTP and binary connections
### SQL
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New UUID() function to generate Unique IDs
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New statistic functions: mode(), variance(), stddev(), median(), percentile()
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Rewritten implementation of shortestPath() function to be much faster
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Improvement for “order by @rid desc” to browse results in opposite direction without use an index or RAM
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Added UNSAFE to CREATE PROPERTY command to avoid slow checks auto conversion from map when working on EMBEDDED types
### Tools
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Studio: New Layout, new Graph Editor, new Security panel (Users and Roles management)
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New ETL module to import data from JDBC, CVS and JSON input sources
更多内容请看: http://www.orientechnologies.com/orientdb-2-0-production-ready。