Add apache ivy configuration into an ant build file

To include Apache Ivy library into the build file:

<path id="ivy.lib.path">
<fileset dir="c:/apps/apache-ivy-2.3.0" includes="*.jar"/>
</path>

<taskdef resource="org/apache/ivy/ant/antlib.xml"
uri="antlib:org.apache.ivy.ant" classpathref="ivy.lib.path"/>

This does not require copying the ivy.jar file into the ant’s lib directory.

Configure ZFS RAIDZ on Ubuntu

1. Most of the below commands require the root privilege, so switch to root now:
   
sudo -s

2. Create a new zfs pool with the name of “u” as a raidz, which tolerates a complete failure of one drive without any data loss. For more redundancy, use “raidz2”, which tolerates a complete failure of two drives at the expense of reduced storage capacity.
   zpool create u raidz /dev/sdb /dev/sdc /dev/sde /dev/sdf -f
3. Verify that the pool is successfully created:
   zpool status u
4. Create several filesystems to store movies, music, documents, etc.:
   
zfs create u/movies
zfs create u/music
zfs create u/documents
zfs create u/backup
zfs create u/software
zfs create u/pictures

5. Share these filesystems via nfs:
   
zfs set sharenfs=on u/movies
zfs set sharenfs=on u/music
zfs set sharenfs=on u/documents
zfs set sharenfs=on u/backup
zfs set sharenfs=on u/software
zfs set sharenfs=on u/pictures

6. Pictures are valuable; so, store each file twice:
   
zfs set copies=2 u/pictures

7. Documents are even mode valuable; so, store three copies of each file. In addition, enable compression, since text files compress well.
   
zfs set copies=3 u/documents
zfs set compression=on u/documents


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For information about installing ZFS on Ubuntu, please see the post Install ZFS on Ubuntu.