Python*

Welcome to the Dev Story/*HACK THE CODE*/ Sticky Thread

Working on modifications, mini-challenges or new levels?

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To create Dev Story/*HACK THE CODE*/ we used the Intel XDK and Crosswalk with a couple of open-source javascript libraries.

Panda.js – HTML5 Game Engine
Pixi.js – 2D webGL renderer with canvas fallback

Hadoop Hbase 升级

Hadoop HDFS 与Hbase升级笔记

由于之前使用了hadoop1.0.2,hbase 使用的是hbase-0.92.1 但是一次事故导致元数据丢失,且修复元数据的类本身有BUG
所以摆在眼前的只有两条路:
1、修改hbase源码重新编译 hbase 修复BUG
2、升级到下一个版本,且这个版本已经修复了此BUG 从release node中看到 0.92.2及以后版本均修复了此bug
  所以决定升级到最新的稳定版 hbase-0.94.3 而此版本的hbase 和hadoop-1.0.4 的兼容性最好,所以hadoop 连带升级到hadoop-1.0.4

1. Hadoop升级步骤:
 (1)停止集群上的所有MR任务,包括Hbase(如果Hbase在使用中,先停掉,接着是zookeeper)
 (2)停止DFS(1、2两步也可以在hbase和zookeeper关闭后使用stop-all.sh脚本直接关闭)
 (3)删除临时数据,即在core-site.xml中设置的hadoop.tmp.dir的value所文件目录下的文件
 (4)备份HDFS元数据

java socket 多线程网络传输多个文件

     由于需要研究了下用 java socket 传输文件,由于需要传输多个文件,因此,采用了多线程设计。客户端每个线程创建一个 socket 连接,每个 socket 连接负责传输一个文件,服务端的ServerSocket每次 accept 一个 socket 连接,创建一个线程用于接收客户端传来的文件。

1、服务端

The Core Software Strategy - 9 years old and still true!

I wrote this post on my Intel Software Blog back on September 20, 2006. Unfortunately, the post was apparently too old, and I must have missed the notice that it was going to be unpublished. Fortunately, Google caches this stuff, so I was able to resurrect the text, which I am reposting below. Thanks, Google!

The 0-Day Challenge: What is the Pulse of the Internet?

The core components of the Internet get updated constantly. Every time the source changes, the health and performance can change. A single source code change can fail to build, can break compatibility with existing code and can change the performance anywhere from a fraction of a percent up to 10% or more on major customer workloads. We're trying to read the pulse of our core components (Python, PHP, HHVM) every day. We call this our "0-day Lab". Here's how it works:
Iscriversi a Python*