ulinkwo

class tomcat {
  $tomcat_url = "http://mirrors.axint.net/apache/tomcat/tomcat-7/v7.0.25/bin/apache-tomcat-7.0.25.tar.gz"
  $jdk_url = "http://download.oracle.com/otn-pub/java/jdk/6u25-b06/jdk-6u25-linux-x64.bin"

  Exec {
    path  => "${::path}",
  }
  group { "puppet":
    ensure  => present,
  }

ulinkwo

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

rbe

public class PipeTest {

    public static void main(String[] args) throws java.io.IOException, java.lang.InterruptedException {
        java.lang.Runtime rt = java.lang.Runtime.getRuntime();
        // Start three processes: ps ax | grep rbe | grep JavaVM
        java.lang.Process p1 = rt.exec("ps ax");
        java.lang.Process p2 = rt.exec("grep rbe");
        java.lang.Process p3 = rt.exec("grep JavaVM");
        // Start piping
        java.io.InputStream in = Piper.pipe(p1, p2, p3);