Orion上下文数据如何在Cosmos中持久保存? [英] how is Orion context data persisted in Cosmos?

问题描述

我听说过一个连接器将Cosmos中的Orion上下文数据持久化，以创建此类数据的历史视图.

I've heard about a connector persisting Orion context data in Cosmos in order to create a historical view of such data.

这种连接器的名称是什么，在哪里可以找到有关它的文档? 持久数据的格式是什么? 数据在Cosmos中存储在哪里?

What's the name of such connector and where can I find documentation about it? What's the format of the persisted data? Where is the data stored within Cosmos?

推荐答案

您要的连接器是 Cygnus ，这是一种基于Flume的软件，能够接收来自Orion的通知并将其保存在Cosmos中.

The connector you are asking for is Cygnus, a Flume-based software able to receive notifications from Orion and persist them in Cosmos.

您可以阅读自述文件.

保留的数据作为文本文件存储在配置的Cosmos用户空间中，即HDFS中的目录，例如/user/myuser/mydataset.对于天鹅座接收到的每个(实体，属性)对，一行都保留在文本文件中.在Cygnus 0.1中，此行以CSV样式("|"分隔符)编写:

The persisted data is stored as text files in the configured Cosmos user space, i.e. a directory in HDFS such as /user/myuser/mydataset. For each (entity,attribute) pair received by Cygnus, a line is persisted in a text file. In Cygnus 0.1 this line is written in CSV style ('|' separator):

ts|iso8601date|entityId|entityType|attributeName|attributeType|value

在一个名为(每个(实体，属性)对的文件中)的文本文件中:

in a text file called (a file per (entity,attribute) pair):

/user/myuser/mydataset/entityId-entityType-attributeName-atributeType.txt

尽管如此，从0.2版(含)起，这些行均以Json格式编写:

Nevertheless, from release 0.2 (inclusive) the lines are written in Json format:

{"ts"="xxx", "iso8601date"="xxx", "entityId"="xxx", "entityType"="xxx", "attributeName"="xxx", "attributeType"="xxx", "value"="xxx"|{...}|[...]}

在一个称为(每个实体的文件)的文本文件中:

in a text file called (a file per entity):

/user/myuser/mydataset/cygnus-myuser-mydataset-entityId-entityType.txt

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