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Servers & Storage Feed

Sun Servers and Storage, Solaris, Oracle Linux, Red Hat Linux, Oracle VM for x86, Oracle VDI and Virtualization resources, news, and support articles.

Our Next Test Day is September 15: Xen Project 4.6 RC3

The Third 4.6 Release Candidate to be Tested on Tuesday

TestDayOur Xen Project Test Days help insure that upcoming releases are ready for production, beyond what our automated testing through our Test Lab can accomplish.

Software: Immaculate, fetid and grimy

Once, long ago, there was an engineer who broke the operating system particularly badly. Now, if you’ve implemented important software for any serious length of time, you’ve seriously screwed up at least once — but this was notable for a few reasons. First, the change that the engineer committed was egregiously broken: the machine that served as our building’s central NFS server wasn’t even up for 24 hours running the change before the operating system crashed — an outcome so bad that the commit was unceremoniously reverted (which we called a “backout”).

node-oracledb 1.1.0 is on NPM (Node.js add-on for Oracle Database)

Version 1.1 of node-oracledb, the add-on for Node.js that powers
high performance Oracle Database applications, is available on href="" >NPM

Compiling GNU 5.2.0 on CentOS 6

1. Prerequisites:
You will need

  1. gmp 4.3.1-7.el6_2.2
  2. mpfr  2.4.1-6.el6
  3. mpc 0.19-1.el6.rf and
  4. isl-0.14

For 1 to 3, do take a look at Compiling GNU 4.8.1 on CentOS 6. For 4, do take look at Compiling isl-0.15 library

Hadoop – Decommission datanode

Decommissioning is process to remove one or multiple datanodes from Hadoop.
To decommission a datanode you need to use following process:
Login to namenode host.
Add follwoing configuration in/home/guest/hadoop-2.5.1/etc/hadoop/hdfs-site.xml


After adding dfs.hosts.exclude property you need to restart HDFS.

Compiling isl-0.15 library

isl-0.15 is required to build GCC with the Graphite loop optimizations. You can download the isl-0.15 from
Compiling isl-0.15
# bunzip2 isl-015.tar.bz2
# tar -xvf isl-0.15
# ./configure --prefix=/usr/local/isl-0.15  --with-gmp-prefix=/usr/local/gmp-4.3.2
# make && make install

Ansible Playbook – Syntax check and dry run

To perform syntax check and dry run for ansible playbook use following command:
ansible-playbook -i hosts_file --syntax-check --list-tasks playbook.yml
where, –syntax-check is used to check syntax of a playbook & –list-tasks is to all tasks that are executed.

Using DBMS_OUTPUT with Node.js and node-oracledb

The DBMS_OUTPUT package is the standard way to "print"
output from PL/SQL. The way DBMS_OUTPUT works is like a
buffer. Your Node.js application code turns on
DBMS_OUTPUT buffering, calls some PL/SQL code that puts
text into the buffer, and then later fetches from that buffer. Note:
any PL/SQL code that calls DBMS_OUTPUT runs to completion
before any output is available to the user. Also, other database
connections cannot access your buffer.

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