Bookmarks for 24 mag 2013 through 29 mag 2013

These are my links for 24 mag 2013 through 29 mag 2013:

  • DNSViz | A DNS visualization tool – DNSViz is a tool for visualizing the status of a DNS zone. It was designed as a resource for understanding and troubleshooting deployment of the DNS Security Extensions (DNSSEC). It provides a visual analysis of the DNSSEC authentication chain for a domain name and its resolution path in the DNS namespace, and it lists configuration errors detected by the tool.
  • intoDNS: checks DNS and mail servers health – IntoDNS checks the health and configuration and provides DNS report and mail servers report. And provides suggestions to fix and improve them, with references to protocols’ official documentation.
  • Master & Slave PowerDNS – LinuxManage.com – In this short tutorial we will show you how to configure powerdns running as master and slave. For this tutorial purpose, master powerdns host will have ip address 192.168.56.3 and hostname ns1.example.com, slave ip: 192.168.56.4 and hostname: ns2.example.com
  • Sendmail relay configuration on AIX | Leave No Bit Unturned – This document describes how to set up a Sendmail e-mail gateway or relay which will be able to process incoming mail and route it to different mail servers based on domain information. The routing table is based on the Sendmail mailertable feature instead of the usual MX record based routing. This will come handy when there is a need to route mail internally in a different way than externally.

Bookmarks for 25 lug 2012 from 14:52 to 15:47

These are my links for 25 lug 2012 from 14:52 to 15:47:

  • Disaster: LVM Performance in Snapshot Mode – MySQL Performance Blog – In many cases I speculate how things should work based on what they do and in number of cases this lead me forming too good impression about technology and when running in completely unanticipated bug or performance bottleneck. This is exactly the case with LVM
    Number of customers have reported the LVM gives very high penalty when snapshots are enabled (leave along if you try to run backup at this time) and so I decided to look into it.
  • Netexpertise » Mysql Ultra-Fast Backup with LVM – It is generally good practice to respect the two following points when backing up databases. The backup has to be:
    consistent
    fast
    Consistency is easily achieved putting a read lock on all tables beforehands. However, this isn’t always applied, and WILL definately lead to a database integrity problem at some stage.
    Once a lock has been set on the database, the backup has to be as quick as possible, all write instructions being held in the queue.
  • MIME and HTML in Email – How to encapsulate HTML in an email message and send via sendmail