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OpenVOS Blog
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What's new in OpenVOS Release 17.0?
By Paul GreenI've been fielding questions from VOS customers who are considering upgrading to OpenVOS Release 17.0 and they are all asking the same question -- what's new and why should I upgrade? Read on to find my response.
Using SNMP to monitor your connection to your switch
By Noah DavidsWhen trying to diagnose network problems one of the questions I always ask is “What is the status of the switch port that is connected to the module's interface?” The typical answer is “I need to ask the network people”. Now using the magic of Simple Network Management Protocol (SNMP) and the attached command macro it may not be necessary to ask.How to Influence Stratus (and Other Vendors)
By Paul GreenAre you looking for ways to influence your vendors to offer products and features that incorporate the capabilities that you want and need to run your business? There are more ways to influence your vendors than you might realize. Read on to learn some tips that might help you get what you want, not just from Stratus Technologies, but from other vendors as well.
Do you know where your TCP connections really end?
By Noah DavidsTCP was designed to support end to end connections, that is, one host communicating directly with another host. Sure, there were bridges and routers in between, but those devices didn't touch the TCP header or the payload. That, however, is no longer the case.XML, Expat, and Xerces
By Paul GreenDo you wonder what XML stands for? Or do you know what it stands for, but want to know how to process XML documents on VOS? Read on for more information.
Application Performance Problems and Latency
By Noah DavidsThe impact of communication layer latency is typically under estimated when trying to fix application performance problems but correct understanding is critical if you are to direct your efforts toward practical solutions.
A port of the GNU indent command
By Paul GreenA port of the GNU indent command is now available. Read on for more information.
Dealing with Daylight Savings Time
By Noah DavidsIt is coming up on the end of daylight savings time and that means questions; specifically how to change the time zone, does ntpd need to be stopped and restarted when the time zone changes and if ntpd is running will it change the time zone automagically.
Read More | 3 comments | Last comment at 10/27/2009 12:29pmAre you forwarding packets?
By Noah DavidsI recently ran into a site with several modules, each of which was forwarding packets. The worst case was at a rate of 1 every 2 seconds or so. Not very fast you say, but, there are 86,400 seconds in a day so in 1 day that module could be forwarding 63 megabytes (86,400 / 2 * 1472)1 of data out of your network from a "secure" server or transfering 63 megabytes of hacking tools into your secure network.packet_monitor, mirror ports and taps, Oh My!
By Noah DavidsA network trace often points to the root cause of the problem. At a minimum, it reduces the problem space to something that is manageable. How do you get a network trace? There are three possibilities. . . .