blocks|key|1763779|text|http://planetcassandra.org/cassandra/社区版也是免费的，它包含了OpsCenter的一个基本版本--+Datastax|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1763780|以下是社区版和DSE之间的区别|1763781|http://www.datastax.com/download/dse-vs-dsc|1763782|entityMap|0|LINK|mutability|MUTABLE|url|http://planetcassandra.org/cassandra/|1^0|0|11|0|0|0|0|17|1|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|6|7|U|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|V|8|@]|9|@$A|W|B|X|1|Y]]|C|$]]|$1|H|3|-4|5|6|7|Z|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]|P|$5|K|L|M|C|$N|G]]]]

Datastax Community Edition is also free, it contains a basic version of OpsCenter -- <a href="http://planetcassandra.org/cassandra/">http://planetcassandra.org/cassandra/</a>

Here is the difference between the community edition and DSE

<a href="http://www.datastax.com/download/dse-vs-dsc">http://www.datastax.com/download/dse-vs-dsc</a>

blocks|key|1763776|text|它们都可以在生产中使用。DataStax企业版在Apache+Cassandra之上提供了一系列额外的功能，并提供了支持。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1763777|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

They can both be used in production. DataStax Enterprise comes with a bunch of extra features on top of Apache Cassandra, and also comes with support.

blocks|key|4404221|text|Datastax是一家商业公司，它支持C*。Cassandra的基本源代码取自Apache存储库，然后合并它们自己的一些代码。除此之外，正如其他人已经提到的，Datastax版本附带了一些用于维护Cassandra集群的额外工具。Datastax+Enterprise的好处之一是其简洁的SOLR集成，这是另一个伟大的Apache+Foundation项目。Cassandra附带了一种名为CQL+(Cassandra+Query+Language)的查询语言，它与SQL“相似”，但是您应该将CQL视为SQL的表亲，而不是兄弟。企业版的一个很好的特性是您可以通过CQL集成来查询SOLR索引，而且Cassandra+Cluster与SOLR共享它的资源，因此您不需要SOLR的第二个Cluster。你可以..。设置Apache或Datastax+Cassandra时，您会得到几乎相同的结果，但如果您需要类似于SQL的语句(Cassandra本身不提供)，或者您有一个非常不规范的数据库并且需要搜索功能，那么Datstax+Enterprise+(DSE)是您唯一可行的选择。正如已经有人提到的，DSE对初创企业是免费的，直到它们达到300万美元的年收入，或者有3000万美元的资金。这应该让每个人都有机会利用NoSQL的力量，并使用最可靠的大数据数据库之一。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4404222|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Datastax is a commercial company, who supports C*. The base source code of Cassandra is taken of the Apache Repositories, then some of their own code is merged. Besides this, as already mentioned by others, Datastax version comes with some additional tools for maintaining a Cassandra Cluster. 
One of the benefits of Datastax Enterprise is their neatless SOLR Integration, another great Apache Foundation Project. 
Cassandra comes with a Query Language called CQL (Cassandra Query Language) which is "similar" to SQL, you should however think of CQL like a cousin of SQL, not a brother. 
One of the great features of the Enterprise edition is that you can query a SOLR index through their CQL integration, also a Cassandra Cluster shares it's resources with SOLR, so you don't need a second Cluster for SOLR. 
You could... set up Apache or Datastax Cassandra, you would get almost the same thing, but if you need something similar to SQL Like Statement (natively not available in Cassandra), or you do have a very much denormalized database and you need search capabilities, then Datstax Enterprise (DSE) is your only viable choice. 
As someone already has mentioned, DSE is free for startups until they reach an annual revenue of 3m USD, or are funded with 30m. This should give everybody the opportunity to leverage the power of NoSQL and use one of the most reliable databases for big data out there.

blocks|key|2291847|text|对于Cassandra产品，如果您的组织对开源感到满意，您可以在生产中使用Apache开源产品。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2291848|您还可以使用Cassandra的Datastax+Community版本，它也是开放源码的，并且可以免费部署；这让您从提供商业支持的DataStax那里得到了更多的保证。|2291849|然后是DataStax企业版，这是您付费使用的版本，其中包含支持模型。它仍然使用开源的Cassandra，并使用来自DataStax的额外代码。他们还将此版本通过内部测试流程，因此他们很乐意支持它。这通常意味着版本将滞后于Apache和社区版本，如果这对您很重要的话。|2291850|DataStax+'Dev+Center‘产品是一个图形用户界面工具，它允许您针对Cassandra安装输入CQL命令-它可以免费用于任何版本。您可能会发现它很有用，尽管CQLSH命令行应该提供您可能需要的大部分内容(以及Cassandra+CLI)。|2291851|DataStax+'Ops+Center‘产品有一个免费版本，它可以在任何带有用于从每个节点收集数据的关联'DataStax代理’的Cassandra上运行。Ops+Center的企业版包括附加功能；如果您购买了完全支持DSE+(DataStax企业版)堆栈，则可以使用该功能。|2291852|希望这能有所帮助。在Planet+Cassandra和DataStax网站上提供了更多信息。|2291853|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|P|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|Q|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|R|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|S|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|M|$]]

For the Cassandra product, you can use the Apache open source offering in production, if your organisation is comfortable with open source.

You can also use the Datastax Community version of Cassandra, which is also open source and free to deploy; that gives you a bit more assurance from DataStax who offer commercial support.

Then there is DataStax Enterprise, which is the version that you pay to use, with a support model included. This still uses open source Cassandra, with additional code from DataStax. They have also put this release through their internal test processes, so that they are happy to support it. That generally means the releases will lag that Apache and Community versions, if that matters to you.

The DataStax 'Dev Center' product is a GUI tool that allows you to enter CQL commands against a Cassandra installation - it is free to use against any release. You may find it useful, though the CQLSH command-line should offer much of what you may need (and Cassandra CLI).

The DataStax 'Ops Center' product is available in a free version, which can run against any Cassandra with the associated 'DataStax Agent' used to collect data from each node. The Enterprise version of Ops Center includes additional functionality; that is available if you purchase the fully support DSE (DataStax Enterprise) stack.

Hope that helps. Much more information available at Planet Cassandra and the DataStax web sites.

blocks|key|4404262|text|除了Apache+Cassandra之外，还有Scylla，它是用C%2B%2B编写的Cassandra的一个替代版本。它声称比Apache+Cassandra快10倍。然而，Scylla仍然是alpha版本，您应该在生产环境中远离它。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4404263|Scylla的目标是支持cassandra的所有功能和工具。它还支持JMX监控。|4404264|entityMap|0|LINK|mutability|MUTABLE|url|http://www.scylladb.com/^0|N|6|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

Besides Apache Cassandra, there's <a href="http://www.scylladb.com/" rel="nofollow noreferrer">Scylla</a> which is a drop in replacement for Cassandra written in C++. It claims to be 10 times faster than Apache Cassandra. However, Scylla is still in alpha version, and you should stay away from it in a production environment.

Scylla aims to support all cassandra features together with toolings. It also supports JMX monitoring.

blocks|key|4404183|text|Apache+Cassandra还拥有DataStax的所有功能和社区版。因此，您可以将Apache+Cassandra放在生产环境中。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4404184|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Apache Cassandra also have all features as well as community edition of DataStax . So you can put Apache Cassandra on Production enivorment .

blocks|key|5820093|text|DSE的另一个好特性是能够备份和恢复您的Cassandra数据库，如果您计划在生产环境中使用它，我认为这是非常重要的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5820094|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Another good feature of DSE is the ability to do backup and recovery of your Cassandra database which I would think is very important if you are planning to use this in a production setup.

Is Datastax Cassandra the only available Cassandra that can be used in a production environment? Is there any free alternatives available? What about the cassandra available on Apache site?

Apache Cassandra vs Datastax Cassandra

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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Datastax Cassandra是唯一可以在生产环境中使用的Cassandra吗？有没有免费的替代方案？Apache站点上提供的cassandra怎么样？

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