Freelance Linux, Windows, and Cisco buff sought for a few days’ work
If you fit the bill for the below, get in touch. This is not for my company, I am spreading it on behalf of a friend.
I can be contacted at dave@dave.io if you want to communicate privately.
Hi,
My current client are looking for someone with knowledge of all of the
following:
• Windows Server networking;
• ASP.NET networking;
• IIS networking;
• Cisco switch configuration;
• Linux networking;
• PHP networking
One of their websites is currently exhibiting strange behaviour. Its
architecture is as follows:
• The website front-end is written in PHP;
• It is running on Apache on CentOS;
• It is plugged in to a Cisco switch;
• It connects to a Windows machine plugged in to another Cisco switch;
• That Windows machine is running IIS;
• The IIS server is running a .NET application that retrieves data
from a database.
Every 5 minutes or so, the site hangs. All the requests freeze, and a
backlog of requests builds up on the web servers. On the Windows
server, the network activity flatlines. The switches are showing
millions of networking errors, possibly due to dropped packets. I
believe this behaviour is being exhibited on several servers. After
spending a week looking at the issue, we are still unable to narrow
down the problem. It does not appear to be caused by the PHP or .NET
code, as their lots are showing normal code execution except for the
affected calls. When a service call from the PHP server to the .NET
server does hang, .NET says it returned results in 145ms and PHP says
it took 10 seconds for the call to complete.
They are looking for someone with knowledge of the issues mentioned
above to work at their office next week for a few days to rectify the
problem. Do you know anyone who may be able to help? if so, please
forward this e-mail to them or call me as soon as possible.
Posted on Friday July 23rd
