balloons io

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

First, the concept NiO is the new IO, the library is introduced in JDK1.4. NiO and IO have the same effect and purpose, but the implementation is different, NIO is mainly used in blocks, so the efficiency of NIO is much higher than IO. Two sets of NIO are provided in the Java API, one for standard input output NIO and the other for network programming NiO. Ii. t

A good introduction and use of Linux IO monitoring commands.1. System Level IO monitoring IostatIostat-xdm 1 # Personal habits%util indicates how busy the disk is. 100% indicates that the disk is busy and 0% indicates that the disk is idle. Note, however, that disk busy does not represent high disk (bandwidth) utilizationArgrq-sz submitted to the drive layer IO r

IO model1, blocking IO2, non-blocking IO3, multiplexing IO4, asynchronous IOOne, blocking IOThe blocking IO is characterized by a block of two phases of IO execution (two stages of waiting for data and copying data).Virtually all IO interfaces (including the socket interface) are blocking, unless specifically specified

Java IO producer stream and byte streamI. Basic Concepts Stream: flows from one end to the other, from the source to the destination.Always centered on the program, it is a program and a file | array | Network Connection | database operations. Ii. IO stream classification 1. Flow Direction: Input stream and output stream 2. Data: Byte stream: Binary. It can process text files, videos, and audios.Upload stre

Original address: http://tutorials.jenkov.com/java-nio/nio-vs-io.htmlauthor : Jakob Jenkov translator : Guo proofreading: Fang FeiAfter learning the APIs for Java NIO and Io, a problem immediately poured into my mind:When should I use IO and when do I use NIO? In this article, I'll try to clearly parse the differences between Java NiO and Io, their usage scenario

Transferred from: http://blog.csdn.net/keda8997110/article/details/19549493After learning the APIs for Java NIO and Io, a problem immediately poured into my mind:When should I use IO and when do I use NIO? In this article, I'll try to clearly parse the differences between Java NiO and Io, their usage scenarios, and how they affect your code design.The main differ

{alert ('The browser does not support WebSocket ~ ');} Currently, browsers such as chrome and firefox support websocket, but IE does not. Next, let's briefly talk about the server's support for websocket. The server supports many websocket languages and has related open-source projects, such as php phpwebsockets: http://code.google.com/p/phpwebsockets/, Java's jwebsocket:http://jwebsocket.org /.For more information, see this article: Start Using HTML5 WebSockets Today.Socket.

Transferred from: http://www.cnblogs.com/zhaoyl/p/5901680.htmlAfter reading this article, the title is self-evident. Transfer from http://blog.chinaunix.net/uid-27105712-id-3270102.htmlIn Linux development, there are several things related to performance, technical staff are very concerned about: process, cpu,mem, network io, disk IO. This paper intends to be detailed and comprehensive, in layman's terms. P

After learning the APIs for Java NIO and Io, a problem immediately poured into my mind:When should I use IO and when do I use NIO? In this article, I'll try to clearly parse the differences between Java NiO and Io, their usage scenarios, and how they affect your code design.The main differences between Java NiO and IOThe following table summarizes the main differ

Generalized synchronous/asynchronous, blocking/ non-blocking Synchronous vs Asynchronous (synchronous vs asynchronous) A message communication mechanism that synchronizes and asynchronously concerns. Synchronization and Asynchrony are just the mechanisms for how messages of concern are notified. In the case of synchronization, it is up to the handler to wait for the message to be triggered (take the initiative to get the state), and asynchronously to notify the processing message by the trigge

With the development of Oracle databases, ldquo and I/O have become a trend. One of the important features of the ExtraData all-in-one machine is to maximize the I/O capability. With the development of Oracle databases, ldquo and I/O have become a trend. One of the important features of the ExtraData all-in-one machine is to maximize the I/O capability. Oracle Database is developing to this day, and I/O is king. One of the important features of the ExtraData all-in-one machine is to maximiz

in the 37degree of small partners to work together, Zhuge IO Refined operational analysis tools on February 13, 2015 formally met with you! While there are a number of statistical analysis tools present in front of us, we firmly believe that in the field of mobile data analysis, Zhuge IO analysis Tools will be an important of Change. Zhuge io- will let you read

Tags: mapping example virtual ALT address Space Col OS return readSome concepts:Virtual Space : is the space in which all the addresses that the process sees are composed. A process in the virtual space remapping all the physical addresses assigned to it.The addressing return is related to the number of bits in the computer. It is divided into kernel space and user space. For 32-bit Linux systems, the highest 1G bytes are kernel space. The lowest 3G bytes are user space.Process Blocking : This i