开源软件名称：

crux-database

开源软件地址：

https://gitee.com/mirrors/crux-database

开源软件介绍：

XTDB is a general purpose database with graph-oriented bitemporal indexes.Datalog, SQL & EQL queries are supported, and Java, HTTP & Clojure APIs areprovided.

XTDB follows an unbundled architectural approach, which means that it isassembled from decoupled components through the use of an immutable log anddocument store at the core of its design. A range of storage options areavailable for embedded usage and cloud native scaling.

Bitemporal indexing of schemaless documents enables broad possibilities forcreating layered extensions on top, such as to add additional transaction,query, and schema capabilities. In addition to SQL, XTDB supplies aDatalog query interface that can beused to express complex joins and recursive graph traversals.

Quick Links

Documentation

Maven releases

<dependency>  <groupId>com.xtdb</groupId>  <artifactId>xtdb-core</artifactId>  <version>1.20.0</version></dependency>

[com.xtdb/xtdb-core "1.20.0"]

com.xtdb/xtdb-core {:mvn/version "1.20.0"}

Release notes
Support: Zulip community chat | GitHub Discussions | [email protected]
Developing XTDB

Unbundled Architecture

XTDB embraces the transaction log as the central point of coordination whenrunning as a distributed system. Use of a separate document store enables simpleeviction of active and historical data to assist with technical compliance forinformation privacy regulations.

What do we have to gain from turning the database inside out? Simpler code,better scalability, better robustness, lower latency, and more flexibility fordoing interesting things with data.
— Martin Kleppmann

This design makes it feasible and desirable to embed XTDB nodes directly withinyour application processes, which reduces deployment complexity and eliminatesround-trip overheads when running complex application queries.

Repo Layout

XTDB is split across multiple projects which are maintained within thisrepository. core contains the main functional components of XTDB alongwith interfaces for the pluggable storage components (Kafka, LMDB, RocksDBetc.). Implementations of these storage options are located in their ownprojects.

Project directories are published to Maven independently so that you canmaintain granular dependencies on precisely the individual components neededfor your application.

Pre-Release Snapshot Builds

Maven snapshot versions are periodically published under dev-SNAPSHOT and areused to facilitate support and debugging activities during the developmentcycle. To access snapshots versions, the Sonatype snapshot repository must beadded to your project definition:

<repository>  <id>sonatype.snapshots</id>  <name>Sonatype Snapshot Repository</name>  <url>https://s01.oss.sonatype.org/content/repositories/snapshots</url>  <releases>    <enabled>false</enabled>  </releases>  <snapshots>    <enabled>true</enabled>  </snapshots></repository>

;; project.clj:repositories [["sonatype snapshots" {:url "https://s01.oss.sonatype.org/content/repositories/snapshots"}]]

;; deps.edn:mvn/repos {"sonatype snapshots" {:url "https://s01.oss.sonatype.org/content/repositories/snapshots"}}

In contrast to regular releases which are immutable, a dev-SNAPSHOT releasecan be "updated" - this mutability can often be useful but may also causeunexpected surprises when depending on dev-SNAPSHOT for longer than necessary.Snapshot versions, including full dev-<timestamp> coordinates (which areuseful to avoid being caught out by mutation), can be browsedhere.

Copyright & License

The MIT License (MIT)

Permission is hereby granted, free of charge, to any person obtaining a copy ofthis software and associated documentation files (the "Software"), to deal inthe Software without restriction, including without limitation the rights touse, copy, modify, merge, publish, distribute, sublicense, and/or sell copiesof the Software, and to permit persons to whom the Software is furnished to doso, subject to the following conditions:

The above copyright notice and this permission notice shall be included in allcopies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS ORIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THEAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHERLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THESOFTWARE.