Berkeley DB java 版本，有 Java 中的 LGPL 或 BSD 替代品吗？
我正在处理一个由键值对组成的巨大数据集。查询始终采用键空间范围查询的形式（键是数字），因此任何类似 B 树的持久结构都可以处理这种情况。我想使用 BDB-Java 版本，但该产品是闭源的，我的公司不想购买 BDB-JE 许可证。我想知道，您能否分享您使用任何基于非 GPL java 的键值存储系统的经验。
谢谢， -一个
I am dealing with a huge dataset consisting of key-value pairs. The queries are always in the form of range queries on the key space (keys are numbers) hence any persistent B-Tree like structure will handle the situation. I would like to use BDB-Java Edition but the product is closed source and my company doesn't want to buy BDB-JE License. I am wondering, would you please share your experience with any non-GPL java based key-value storage system.
Thanks,
-A
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还有OrientDB，这是一个用Java编写的文档数据库，可以嵌入到应用程序中（无需外部服务器）如 BDB Java 版本。他们使用 Apache 2.0 许可证。
它们还有基于键/值的变体：OrientKV。我自己并没有真正使用过 Orient，只是闲逛，所以我不知道它是否支持您的用例（键空间上的范围查询）。然而，它宣传自己速度非常快。
不过，Orient DB 似乎并没有被广泛使用。我什至提出了一个问题< /a> 询问是否有人有任何经验可以分享。
There is also OrientDB, which is a document database written in Java and can be embedded to application (no external server) like BDB Java edition. They use Apache 2.0 license.
They also have key/value based variant: OrientKV. I haven't really used Orient myself, just poking around, so I don't know if it supports your use case (range queries on key space). However, it advertises itself as really fast.
Though, it seems Orient DB is not very widely used. I even made a question asking if anybody has any experiences to share.