flume pipe

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

1. overview-"three Functions of flume"collecting, aggregating, and movingCollect aggregation Moves2. Block diagram　　3. Architectural Features-"on Streaming Data flowsstreaming-based dataData flow: job-"get Data continuously"Task Flow: JOB1->JOB2->JOB3JOB4-"for Online analytic application.-"flume is only running in the Linux environmentWhat if my log server is windows?-"very SimpleWrite a configuration file,

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

How does the internal pipeline implement-size, organization, ring queue?I. There are several ways of interprocess communication, this article mainly explains the understanding of pipelines. Pipelines are divided into anonymous pipes and named pipes. (1) piping (pipe): also known as anonymous pipes. is a half-duplex mode of communication in which data can only flow in one direction and can only be used between processes that have affinity. A process'

Communication effects between processes1. Data transfer: A process needs to upload his data to other processes2. Resource Sharing3. Process notification Events4, Process Control: Some processes completely control the execution of another process, such as debug State AHWe need to take full control of his every step of the operation;Communication development HistoryThe communication IPC between Linux processes evolved from the following sections:1. Communication between UNIX processes2. Communicat

Multi-Instruction execution Symbol Format Role ; Comd1;comd2 Execute sequentially COMD1 COMD2 COMD1 properly executed, COMMD2 executed,Comm1 execution fails, COMMD2 does not execute | | comd1 | | Comd2 COMM1 execution failed, execution commd1COMM1 execution succeeds and does not execute COMMD2 The difference between a pipe (|) and a red

Use a dual pipeline to communicate to two processes, no need to re-open process high efficiency "use a process to communicate over and over two pipelines four handles, two member variables two local variables" modify the code for single pipe 1 "Paste into the constructor:Modify the name of the variable after pasting into the constructor:The changes are as follows:The code selected above is the paste to be used when executing the command to the followi

First, when there is no data to read O_nonblock Disable:read Call blocking, the process suspends execution until the data arrives. The O_nonblock enable:read call returns a -1,errno value of Eagain. The sample program is as follows: /************************************************************************* > File name:process_.c > Author:simba > Mail:dameng34@163.com > Created time:sat Feb 2013 02:34:02 PM CST * * * / #include # Include #include #include #include #include #include

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.

Time Limit: 3.000 secondsTime Limit: 3.000 seconds Background Background Filters, or programs that pass "processed" data through in some changed form, are an important class of programs in the UNIX operating system. A pipe is an operating system concept that permits data to "flow" between processes (and allows filters to be chained together easily .)In UNIX operating systems, filters are an important class.Program. The format of the data that i

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

http://siqun.blog.163.com/blog/static/213496001201341231121720/Reprint Link: HTTP://HI.BAIDU.COM/HJ11YC/ITEM/9A2EA30CCA773077BFE97EFCNote: Add a little bit of contentinterprocess communication Fork Pipe pie_t usage (Pipeline mechanism communication)Each process has a different user address space, the global variables of any one process can not be seen in another process, so the process to exchange data between the kernel, the kernel to open a buffer,

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

The pipe command is using the "| "This defining symbolpipe Command "| "can only deal with the correct information coming through the previous command, i.e. Standard Output the information, for Standard Error and there's no direct processing capability.The first data that is followed by each pipe must be "command", and the command has to be able to accept the data of Standrad input before it can be a "

Multiprocessing. Pipe ([duplex])Returns 2 Connection objects (CONN1, conn2), which represent both ends of the pipeline, and the default is two-way communication. If DUPLEX=FALSE,CONN1 can only be used to receive messages, CONN2 can only be used to send messages. Unlike Os.open, where Os.pipe () Returns 2 file descriptors (R, W) representing both readable and writableExamples are as follows:#!/usr/bin/python#coding =utf-8ImportOs fromMultiprocessingImp

Multiprocessing. Pipe ([duplex])returns 2 Connection objects (CONN1, CONN2), representing the ends of the pipe, which are two-way traffic. If DUPLEX=FALSE,CONN1 can only be used to receive messages, CONN2 can only send messages. The Os.open is different from os.pipe () Returns 2 file descriptors (R, W) that represent both readable and writable Examples are as follows: Copy Code code as follows:

Multiprocessing. Pipe ([duplex])Returns 2 Connection objects (CONN1, conn2), which represent both ends of the pipeline, and the default is two-way communication. If DUPLEX=FALSE,CONN1 can only be used to receive messages, CONN2 can only be used to send messages. Unlike Os.open, where Os.pipe () Returns 2 file descriptors (R, W) representing both readable and writableExamples are as follows:#!/usr/bin/python#coding =utf-8Import OSFrom multiprocessing i

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