flume samples

Recently learned the use of the next flume, in line with the company will be independent of the development of the log system, the official website user manual: Http://flume.apache.org/FlumeUserGuide.htmlFlume schema A. ComponentFirst move, the structure of the Internet.As you can see from the diagram, the Flume event is defined as a data stream, a data stream consisting of an agent, which is actually a JVM

{ return null; } }4. Return to a usable sinkIf a failure occurs, then look at the execution logic of the first half of the code in the process:Long now = System.currenttimemillis (); while (!failedsinks.isempty () Failedsinks.peek (). Getrefresh () Prerequisites: Failedsinks is not empty and the sink activation time of the team header is less than the current time1, poll out the queue of the first Failedsink2, using the current sink processing, if the processing is successful, then

I am testing HDFs sink, found that the sink side of the file scrolling configuration items do not play any role, configured as follows:a1.sinks.k1.type=hdfsa1.sinks.k1.channel=c1a1.sinks.k1.hdfs.uselocaltimestamp=truea1.sinks.k1.hdfs.path=hdfs:/ /192.168.11.177:9000/flume/events/%y/%m/%d/%h/%ma1.sinks.k1.hdfs.fileprefix=xxxa1.sinks.k1.hdfs.rollinterval= 60a1.sinks.k1.hdfs.rollsize=0a1.sinks.k1.hdfs.rollcount=0a1.sinks.k1.hdfs.idletimeout=0The configur

1. Introduction to Flume Flume is a distributed, reliable, andHigh AvailabilityA system that aggregates massive logs. It supports customization of various data senders to collect data. Flume also provides simple processing of data and writes it to various data receivers (customizable) capabilities.Design goals: (1) Reliability When a node fails, logs can be trans

This article is a simple example of the flume official document in the practice and description of the official example Http://flume.apache.org/FlumeUserGuide.html#a-simple-example Flume's Netcat source automatically creates a socket Server that can fetch data simply by sending the data to the netcat source of this socket,flume. Examples are as follows: 1, first configure the agent: in Flume's conf dire

This paper will take timestampinterceptor as an example to analyze how interceptors work in Flume.First, consider the implementation structure of the Interceptor.1. Interceptor interface is realizedThe method of the interface is defined as follows: public void Initialize (); Public event intercept (event event); Public list public void close ();/** Builder implementations must have a no-arg constructor * * Public Interface Builder extends configurable { Publ IC Interceptor Build (); }2.

ObjectiveFirst look at the definition of event in Flume official websiteA line of text content is deserialized into an event "serialization is the process of converting an object's state into a format that can be persisted or transmitted. Relative to serialization is deserialization, which transforms a stream into an object. These two processes combine to make it easy to store and transfer data ", the maximum definition of event is 2048 bytes, exceedi

From Bin/flume this shell script can see Flume starting from the Org.apache.flume.node.Application class, which is where the main function of Flume is.The Main method first parses the shell command, assuming that the specified configuration file does not exist and then dumps the exception.According to the command contains the "no-reload-conf" parameters, decided

I. Introduction of FlumeFlume is a distributed, reliable, and highly available mass-log aggregation system that enables the customization of various data senders in the system for data collection, while Flume provides the ability to simply process the data and write to various data-receiving parties (customizable).Design objectives:(1) ReliabilityWhen a node fails, the log can be transmitted to other nodes without loss.

IconAs shown in the Red box section, I do stability testing, when the flume run a few days later, I found that the counter value gradually become larger, to a certain value, and then become smaller, there is a cycle of the process, and therefore the desire to produce research, the following to see:if (Txneventcount = = 0) { sinkcounter.incrementbatchemptycount (); } else if (Txneventcount = = batchsize) { Sinkcounter.incrementbatchc

internal selection of a valid sink for processingThe exception section, we found that triggered the informsinkfailed () method, let's take a look at the methodpublic void Informfailure (T failedobject) {//if There are no Backoff this method is a no-op. if (!shouldbackoff) {return; } failurestate state = Statemap.get (Failedobject); Long now = System.currenttimemillis (); Long delta = now-state.lastfail; /* * When do we increase the Backoff period? * We Basically calculate the ti

Flume load Balancing is the choice of a certain algorithm per sink output to the specified place, if the file output is very large, load balancing is still necessary, through the output of multiple channels to alleviate the output pressureFlume built-in load balancing algorithm by default is round robin, polling algorithm, ordered selectionHere's a look at the specific examples:# Name The components in this agenta1.sources = R1a1.sinks = K1 k2a1.chann

Multiplexing technology is intended to send an event to a specific channel based on configuration information.A source instance can specify multiple channels, but a sink instance can only specify one channel.Flume supports fanning out the flow from one source to multiple channels. There is modes of fan out, replicating and multiplexingFlume supports two modes of output from source to multiple channel: copy and Reuse1. In copy mode, the event data received by source is output to all channel confi

Basic concepts of flume, data stream model, and flume data stream1. Basic concepts of flume AllFlumeAll related terms are in italic English. The meanings of these terms are as follows. FlumeA reliable and distributed system for collecting, aggregating, and transmitting massive log data. Web ServerOne generationEvents. Agent flumeA node in the system contains thre

good performance where multiple disks is not available for checkpoint and data Directori Es.It is natural that the channel data is synchronized to disk and performance degrades, but the checkpoint mechanism is added to prevent data loss.For the deformed memory channel, which is the memory channel and the file channel used together, we do not explain here, because this mixed use, the official also give hints-not recommended in the production environment to use.The reason for this is that data lo

a certain range, it will flushprivate void Flusheventbatch (listFlush is the event in the EventList that is now being saved and emptied1. Put the event into the configured channelFor (event event:events) { listHere is the detailed procedure for putting the event into the channel, but here you notice that there are two selector getchannel methods, because there are two types of channel selector modes: Multiplexing and Replication if (restart) { logger.info ("Restarting in {}ms, ex

What is a. Flume?Flume is a distributed, reliable system. It can efficiently collect, consolidate, and move large amounts of data from different sources to data center storage.Flume is a top-level project under Apache. Flume not only collects consolidated log data, because the data source can be customized, flume can b

1. OverviewToday, I would add a blog about flume, which was omitted when explaining the highly available Hadoop platform, and this blog will tell you the following: Flume ng Brief Introduction Single point flume ng construction, operation Highly Available flume ng construction Failover test Pre

Reprint marked Source: http://www.cnblogs.com/adealjason/p/6240122.htmlRecently want to play a nasty calculation, first saw the implementation of the principle of flume and source codeSource can go to Apache official website to downloadThe following flume principle and code implementation:Flume is a real-time data collection tool, one of the ecosystem of Hadoop, mainly used in the distributed environment of

Introduction to IBM biginsights Flume Flume is an open source mass log collection system that supports real-time collection of logs. The initial flume version was Flume OG (flume original Generation), developed by Cloudera company, called Cloudera