prometheus io

analysis of high performance IO model Server-side programming often requires the construction of high-performance IO models, with four common IO models: (1) Synchronous blocking IO (Blocking io): The traditional IO model. (2) Sync

here's a new piece. It's kind of a mend. AnywayWhat is the difference between synchronous (synchronous) IO and asynchronous (asynchronous) Io, blocking (blocking) IO and non-blocking (non-blocking) IO respectively. The problem is that different people may give different answers, such as wikis, that asynchronous

here's a new piece. It's kind of a mend. AnywayWhat is the difference between synchronous (synchronous) IO and asynchronous (asynchronous) Io, blocking (blocking) IO and non-blocking (non-blocking) IO respectively. The problem is that different people may give different answers, such as wikis, that asynchronous

These two articles analyze 5 kinds of IO models under Linux http://blog.csdn.net/historyasamirror/article/details/5778378 http://blog.csdn.net/hguisu/article/details/7453390 Many people do not understand the concept of blocking/non-blocking, synchronous/asynchronous, do not know the difference between non-blocking and asynchronous Io, and generally think that non-blocking

First you need to knowWhat is Io:io is the input/output interfaceRead this article to take the following questions1. Cluster bottlenecks why IO?2. How much do you know about IO?This is only a personal point of view:When we are confronted with a cluster of operations, what we want is to be read. But in the face of big data, reading data needs to go through IO, whe

---restore content starts---Copy of 1.linux standard IO#include int main (int argc,char **argv){if (argc{printf ("Use:mycp file1 file2\n");return-1;}File *src=fopen (argv[1], "R");// Open source fileif (src==null){printf ("No file!\n");return-1;}FILE *dest=fopen (Argv[2], "w");if (dest==null){printf ("No file!\n");Fclose (SRC);return-1;}int Ret=fseek (src,0,seek_end);Long Len=ftell (SRC);Rewind (SRC);Char Buffer[len];Ret=fread (BUFFER,LEN,1,SRC);Ret=f

Reprint: http://blog.csdn.net/jay900323/article/details/18141217performance analysis of Linux five IO modelsDirectory (?) [-] Conceptual understanding Five types of IO models under Linux Blocking IO Model Non-blocking IO model IO multiplexing

I. Conceptual understandingThere are four types of IO in Linux: synchronous (Sync) and asynchronous (async), blocking (block) and non-blocking (unblock)Sync: When a function call is made, it waits until the result is returned without getting the results.Async: When an asynchronous procedure call is made, the caller cannot get the result immediately. Notifies the caller by notification mechanism or callback function after completionBlocking: The curren

Add another theoretical analysis with high handwriting to facilitate a deeper understanding. From: http://blog.csdn.net/historyasamirror/article/details/5778378 ========================================================== ================================== What are the differences between synchronous I/O and asynchronous I/O, blocking I/O, and non-blocking I/O? Different people may give different answers to this question. For example, wiki considers asynchronous

Related noun analysisSynchronization (synchronous): When a process executes a task, another process must wait for it to finish before it can continue execution#所谓同步, that is, when a function call is made, the call does not return until the result is obtained. By this definition, the vast majority of functions are synchronous invocations. But generally speaking, we are talking about synchronous and asynchronous tasks, especially those that require other components to collaborate or need to be don

1. Questions:Recently in the real-time synchronization of the log, before the online is done a single part of the online log stress test, Message Queuing and client, the machine is no problem, but did not think of the second log, the problem came:A machine in the cluster top see the load high, the cluster of machine hardware configuration, the deployment of software are the same, but only this one load problem, the initial speculation that there may be hardware problems.At the same time, we also

Tags: Optimize modify understand table store reference response a traditionalI. IO introductionThere are four types of IO: continuous read, random read, random write and continuous write, the IO size of continuous reading and writing is usually larger (128KB-1MB), the main measure of throughput, and random read and write IO