couchtuner io

Disks are usually the slowest subsystem of the computer and are the most prone to performance bottlenecks because the disk is farthest from the CPU and the CPU accesses the disk to involve mechanical operations such as rotating shafts, track-seeking, etc. The speed difference between accessing the hard disk and accessing the memory is calculated in order of magnitude, just like the difference between 1 days and 1 minutes. To monitor IO performance, it

Transferred from: http://www.cnblogs.com/fanzhidongyzby/p/4098546.htmlThis is the clearest article I've ever seen explaining the IO model, and of course, if you want to learn more about it, continue to chew on the Sapphire book.Server-side programming often requires the construction of a high-performance IO model, with four of common IO models:(1) Synchronous blo

Chapter Content　　1 synchronous, asynchronous, blocking, non-blocking concepts25 IO Models: Blocking IO, non-blocking IO, multiplexed io, signal driven IO, asynchronous IO individual featuressynchronous, asynchronous, blocking, non

According to UNIX network programming, IO models can be divided into: blocking io, non-blocking io, io multiplexing, signal-driven IO, and asynchronous Io, divided into two classes according to POSIX standards: synchronous

First, IO Model:1.blocking io blocking IO2.nonblocking io non-blocking IO3.IO Multiplexing IO Multiplexing4.signal driven IO signal driven IO5.asynchronous io Asynchronous IOSecond, blo

Preface Before seeing a very humorous way to explain the windows of the socket IO model, to borrow this story to explain the Linux socket IO model; Lao Chen has a daughter who works in the field and can't often come back, Lao Chen and her through letter contact.Their letters will be delivered by the postman to the mailroom in front of their neighborhood. This is very similar to the socket model. The foll

Reprinted from Http://www.cnblogs.com/fanzhidongyzby/p/4098546.htmlServer-side programming often requires the construction of a high-performance IO model, with four of common IO models:(1) Synchronous blocking IO (Blocking io): The traditional IO model.(2) Synchronous non-bl

Disks are usually the slowest subsystem of the computer and are the most prone to performance bottlenecks because the disk is farthest from the CPU and the CPU accesses the disk to involve mechanical operations such as rotating shafts, track-seeking, etc. The speed difference between accessing the hard disk and accessing the memory is calculated in order of magnitude, just like the difference between 1 days and 1 minutes. To monitor IO performance, it

1.I/O Basic Knowledge 1.1What is a file descriptor? In a network, a socket object is a 1 file descriptor, and in a file, 1 file handles (that is, the files object) are 1 file descriptors. In fact, it can be understood as a "pointer" or "handle", pointing to 1 socket or file object, when the file or socket changes, the object corresponding to the document descriptor, will also change accordingly.1.2What is I/O1, first understand what is I/O?I/O (input/output), which is input/output. The operating

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

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

PrefaceHave seen in a very humorous way to explain the Windows Socket IO model, borrow this story, explain the Linux socket IO model;Lao Chen had a daughter who worked outside and could not come back often, and she contacted her by letter.Their letters will be delivered by the postman to the mailroom in front of their neighborhood. This is very similar to the socket model.The following is an example of the

Co-process: switch on IO operation.But when do you cut it back? How do I know I'm done with IO?Many programmers might consider using a "thread pool" or "Connection pool." The thread pool is designed to reduce the frequency of creating and destroying threads, maintaining a reasonable number of threads, and allowing idle threads to re-assume new execution tasks. Connection pooling maintains a connected cache

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

---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