As Data Center infrastructures become more virtualized, the desire for virtualized network services increases. We see 2 types of offerings: virtual appliances delivered in a VM image, such as the Netscaler VPX from Citrix hardware appliances that can be virtualized, such as Cisco ACE or ASA
The availability of any enterprise application is only as good as the monitoring solutions utilized. The reason being that a well thought out / well deployed monitoring solution not only detects when an application has failed to respond to requests, it can also take steps to being remedy the problem without involving human intervention. The last thing any admin wants… Read more →
Ever asked yourself the question of “I wonder what a trace of my favorite application protocol looks like”? I did that today and found myself browsing through the collection of sample packet captures on wireshark.org. The collection is quite impressive. There are nearly 50 categories of packet captures available, from HTTP to NTP to SQL to IPSec to Kerberos. You… Read more →
Not many people know what LVS is. I ran World Health Organization’s public website (www.who.int) using a pair of Compaq DL360 servers running Linux Virtual Server, which is an open-source load-balancer. And guess what, during SARS, we saw over 14 million hits a day at the peak. While I don’t have the specific cps / concurrent conn numbers (we didn’t… Read more →