Please check out this mildly technical article about how Vista has a bug in the IPV4 implementation. Especially those people with big sites using loadbalancing and other techniques (e.g. BigIP’s from F5) should be aware of this. Windows 7 doesn’t seem to have the same bug though.Although the “Imminent Death of the Net Predicted” is [...]
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Today I spent half a day on an issue with JMeter. I do lots of HTTPS testing and on some of my new PC’s running Ubuntu 8.10 JMeter would only give me… java.net.SocketException: Unconnected sockets not implemented After a lot of searching I discovered that this seems to be an HTTPS change in the Java [...]
SSH is one of the staples when administrating *nix servers. One thing many people know but don’t use is that Blowfish SSH encryption is much faster than AES encryption. This comes in very handy if you are scp-ing large files or piping something over SSH.The speed difference is significant. It can be around 4-5x faster [...]
Lots of us depend on RAID 5 for the security of our data (plus backups of course!). We often don’t really think about what RAID 5 is and the deeper workings of it. Well, I just got a wake-up-call. A good tester should take nothing for granted. Not even RAID 5 (or RAID 6 for [...]
I’ve just finished another performance testing project for a government project. The application was not too testing but like a lot of projects the servers and users are dispersed across the country. This makes the influence of the network a key factor in performance issues. Networks are an unknown beast to most testers and there’s [...]
I do a lot of performance testing in my testing job. Performance testing compared to all other forms of testing is a little out there. It is more of an investigation than a test (testing as where there is a concise goal that is to be reached). There is much to be said for performance [...]