Question

我正在尝试使用通过Orient DB v2.2.37创建的Orient DB 3.0.18打开数据库，但是，错误“输出名称为'snappy'的压缩不存在”。如何使用Orient V3注册快速压缩？我在Maven POM中尝试了org.xerial.snappy，但没有任何乐趣。预先感谢。

2019-04-22 21:44:20 t.c.s.a.d.Services [DEBUG] error:stop:com.orientechnologies.orient.core.exception.OSecurityException: Compression with name 'snappy' is absent
com.orientechnologies.orient.core.exception.OSecurityException: Compression with name 'snappy' is absent
    at com.orientechnologies.orient.core.compression.OCompressionFactory.getCompression(OCompressionFactory.java:79)
    at com.orientechnologies.orient.core.storage.cluster.v0.OPaginatedClusterV0.init(OPaginatedClusterV0.java:1547)
    at com.orientechnologies.orient.core.storage.cluster.v0.OPaginatedClusterV0.configure(OPaginatedClusterV0.java:154)
    at com.orientechnologies.orient.core.storage.impl.local.OAbstractPaginatedStorage.createClusterFromConfig(OAbstractPaginatedStorage.java:4804)
    at com.orientechnologies.orient.core.storage.impl.local.OAbstractPaginatedStorage.openClusters(OAbstractPaginatedStorage.java:519)
    at com.orientechnologies.orient.core.storage.impl.local.OAbstractPaginatedStorage.open(OAbstractPaginatedStorage.java:388)
    at com.orientechnologies.orient.core.db.OrientDBEmbedded.open(OrientDBEmbedded.java:281)
    at com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx.open(ODatabaseDocumentTx.java:903)
    at com.orientechnologies.orient.core.db.OPartitionedDatabasePool$DatabaseDocumentTxPooled.internalOpen(OPartitionedDatabasePool.java:440)
    at com.orientechnologies.orient.core.db.OPartitionedDatabasePool.openDatabase(OPartitionedDatabasePool.java:303)
    at com.orientechnologies.orient.core.db.OPartitionedDatabasePool.acquire(OPartitionedDatabasePool.java:261)
    at com.tinkerpop.blueprints.impls.orient.OrientBaseGraph.<init>(OrientBaseGraph.java:172)
    at com.tinkerpop.blueprints.impls.orient.OrientTransactionalGraph.<init>(OrientTransactionalGraph.java:78)
    at com.tinkerpop.blueprints.impls.orient.OrientGraph.<init>(OrientGraph.java:137)
    at com.tinkerpop.blueprints.impls.orient.OrientGraphFactory$1.getGraph(OrientGraphFactory.java:87)
    at com.tinkerpop.blueprints.impls.orient.OrientGraphFactory.getTx(OrientGraphFactory.java:224)

Answer 1

对于以嵌入式模式使用Orient DB的用户，解决方案如下：

1）从Orient DB Github存储库下载OSnappyCompression.java并将其合并到您的项目中

2）将以下库添加到您的Maven pom.xml

 <dependency>
     <groupId>org.xerial.snappy</groupId>
     <artifactId>snappy-java</artifactId>
     <version>1.1.7.3</version>
 </dependency>

3）在启动Orient DB之前按以下方法注册Snappy压缩方法

 OCompressionFactory.INSTANCE.register(new OSnappyCompression());

Answer 2

很遗憾，此压缩已删除。您必须将数据库转换为非压缩版本。

Orient DB 3.0.18：缺少名称为“ snappy”的压缩

2 个答案: