Question

我需要在SQL表中而不是HDFS文件中保存Cosmos中的数据。

我已经在FI-Lab的Cloud部分部署了一个VM，我安装了0.14.0 Orion版本和0.3天鹅座。我已经配置了Cygnus来存储HDFS和SQL中的数据......问题是，HDFS文件中的持久性工作正常但是在SQL表中是不可能的，尽管在过去我得到了它。这就是为什么我很困惑

我想如果HDFS持久性有效，那应该是cygnus.config文件的问题。所以我在下面展示：

    # APACHE_FLUME_HOME/conf/cygnus.conf

# The next tree fields set the sources, sinks and channels used by Cygnus. You could use different names than the
# ones suggested below, but in that case make sure you keep coherence in properties names along the configuration file.
# Regarding sinks, you can use multiple ones at the same time; the only requirement is to provide a channel for each
# one of them (this example shows how to configure 3 sinks at the same time).
cygnusagent.sources = http-source
cygnusagent.sinks = hdfs-sink mysql-sink
cygnusagent.channels = hdfs-channel mysql-channel

#=============================================
# source configuration
# channel name where to write the notification events
cygnusagent.sources.http-source.channels = hdfs-channel mysql-channel
# source class, must not be changed
cygnusagent.sources.http-source.type = org.apache.flume.source.http.HTTPSource
# listening port the Flume source will use for receiving incoming notifications
cygnusagent.sources.http-source.port = 5050
# Flume handler that will parse the notifications, must not be changed
cygnusagent.sources.http-source.handler = es.tid.fiware.fiwareconnectors.cygnus.handlers.OrionRestHandler
# URL target
cygnusagent.sources.http-source.handler.notification_target = /notify
# Default organization (organization semantic depend on the persistence sink)
cygnusagent.sources.http-source.handler.default_organization = org42

# ============================================
# OrionHDFSSink configuration
# channel name from where to read notification events
cygnusagent.sinks.hdfs-sink.channel = hdfs-channel
# sink class, must not be changed
cygnusagent.sinks.hdfs-sink.type = es.tid.fiware.fiwareconnectors.cygnus.sinks.OrionHDFSSink
# The FQDN/IP address of the Cosmos deployment where the notification events will be persisted
cygnusagent.sinks.hdfs-sink.cosmos_host = 130.206.80.46
# port of the Cosmos service listening for persistence operations; 14000 for httpfs, 50070 for webhdfs and free choice for inifinty
cygnusagent.sinks.hdfs-sink.cosmos_port = 14000
# default username allowed to write in HDFS
cygnusagent.sinks.hdfs-sink.cosmos_default_username = quiquehz
# default password for the default username
cygnusagent.sinks.hdfs-sink.cosmos_default_password = 'password'
# HDFS backend type (webhdfs, httpfs or infinity)
cygnusagent.sinks.hdfs-sink.hdfs_api = httpfs
# how the attributes are stored, either per row either per column (row, column)
cygnusagent.sinks.hdfs-sink.attr_persistence = column
# prefix for the database and table names, empty if no prefix is desired
cygnusagent.sinks.hdfs-sink.naming_prefix =
# Hive port for Hive external table provisioning
cygnusagent.sinks.hdfs-sink.hive_port = 10000

# ============================================
# OrionMySQLSink configuration
# channel name from where to read notification events
cygnusagent.sinks.mysql-sink.channel = mysql-channel
# sink class, must not be changed
cygnusagent.sinks.mysql-sink.type = es.tid.fiware.fiwareconnectors.cygnus.sinks.OrionMySQLSink
# the FQDN/IP address where the MySQL server runs
cygnusagent.sinks.mysql-sink.mysql_host = 130.206.80.46
# the port where the MySQL server listes for incomming connections
cygnusagent.sinks.mysql-sink.mysql_port = 3306
# a valid user in the MySQL server
cygnusagent.sinks.mysql-sink.mysql_username = quiquehz
# password for the user above
cygnusagent.sinks.mysql-sink.mysql_password = 'password'
# how the attributes are stored, either per row either per column (row, column)
cygnusagent.sinks.mysql-sink.attr_persistence = column
# prefix for the database and table names, empty if no prefix is desired
cygnusagent.sinks.mysql-sink.naming_prefix =

#=============================================
# hdfs-channel configuration
# channel type (must not be changed)
cygnusagent.channels.hdfs-channel.type = memory
# capacity of the channel
cygnusagent.channels.hdfs-channel.capacity = 1000
# amount of bytes that can be sent per transaction
cygnusagent.channels.hdfs-channel.transactionCapacity = 100


#=============================================
# mysql-channel configuration
# channel type (must not be changed)
cygnusagent.channels.mysql-channel.type = memory
# capacity of the channel
cygnusagent.channels.mysql-channel.capacity = 1000
# amount of bytes that can be sent per transaction
cygnusagent.channels.mysql-channel.transactionCapacity = 100

Answer 1

查看您的配置，您指向在Cosmos Namenode中运行的MySQL服务器。我不知道这是不是一个错误（然后这可能是它无法正常工作的原因），或者这是你真正的目标（在这种情况下我必须警告你，数据库的外部连接将自动下降）。在任何情况下，由于Cosmos仅用于HDFS存储和MapReduce分析，因此MySQL服务器应该存在于您自己的VM中的Cosmos之外。

在Cosmos中存储SQL

1 个答案: