IPv6 traffic as a percentage of total traffic at isc.sans.org almost tripled from 0.5% to 1.3% of all users of the website. Isc.sans.org is a security institute. The report analyses the provenance of this traffic (lots of tunnels!) and the security implications of this.
If you want to know whatâs cooking on the net, you will at times have to process a lot of measurements. Examples are logs of webservers, and measurements of network activity. You need this ânetwork business intelligenceâ in order to figure out what the users are doing, where the capacity is going, where the delays […]
At the 35th annual international meeting of the Computer Measurement Group (see link), a group of professionals dedicated to performance management and capacity planning, the hot topics were (surprise!) virtualization and clouds. We were presented with stories of companies with hundreds and even thousands of servers. Some of these have utilizations as low as 7%. […]
At the recent Supernova conference (link), thought leaders discussed the network age, and what happens when âcontrol moves to the edgeâ. But does it move to the edge? At Supernova, Harvard Law School professor Jonathan Zittrain dissected the âcomputing cloudâ. His âtale of three cloudsâ presents a critical view of these ephemeral structures. The most […]
This week at the SuperNova conference (link) an impressive set of business and technology leaders meets in what organizer Kevin Warbach calls: the executive forum for the network age. What new opportunities and threats appear with new network technology? Technology allows new good things to happen, like online video sharing. It also allows misuse of […]
The Dutch IPv6 taskforce is running a contest for best contribution to IPv6. 29 submissions have been received for 6 categories. There are some interesting contestants, amongst them WatchMouse, on which I reported earlier. See the full press release (in dutch).
Operations versus development. In a lot of IT organisations these could not be more divided. I have written about that elsewhere (in Dutch though). Operations typically considers every change request as a disruption. Change are the root cause of most problems and outages. A friend of mine sent me a presentation, from Velocity 09. This describes […]
Slowly, but steadily, we see progress on the IPv6 front. Finally, I found a reasonable provider of Virtual Private Server hosting with native IPv6 access (XLS Hosting). Still a few minor issues, but no showstoppers. I have moved a nummber of websites, including this blog to it. So far very few hits (grep “^2…:” /var/www/vhosts/*/statistics/logs/access_log) […]
A couple of weeks ago, I organised a workshop on IPv6 at Hacking at Random.The on-site network had native IPv6 and sflow monitoring, so we could see what was going on. The workshop ran from 10:00 to 11:00 GMT on saturday. As you can see from the graph, IPv6 traffic increased sharply after the workshop. […]
Gmail was down a while. Google describes how it happened. In essence, a mechanism designed to throttle load on heavily used parts of the infrastructure reduced total capacity. If demand is then not reduced this leads to congestion, similar to what happens in a traffic jam. One way for gmail to reduce demand is to […]
