The Archives

• ict / computers, networking

  Network performance on VMware

  12.08.08 | Permalink | 2 Comments

  For the past month or so I’ve been working on a problem a client has with his VMware farm(s). They’re using Vizioncore vReplicator to replicate VMs from their production farm (containing three VMware ESX 3.5 servers connected to an HP EVA fibre SAN) to their backup facility (two VMware ESX 3.5 servers with a similar [...]

• blog, ict / computers

  Gimme powerrrr

  10.28.08 | Permalink | Comment?

  There was a power failure at the NIKHEF data center tonight, one of the (if not THE) biggest AMSiX hubs. Ouch! All connectivity lost to the super data center my little server is in. So…server doing fine, data center doing fine, upstream data link dead. Damn. Back up inside two hours is pretty good though, [...]

• ict / computers, networking

  Cisco TelePresence is pretty cool, actually

  07.24.08 | Permalink | Comment?

  Yes, this is a glitzy marketing video, and yes, the product itself will probably cost an arm, a leg and selling your soul to the devil, but still I’d quite like to have this and work with it. Of course, that would mean I’d need to shave more often before going to work… You need [...]

• ict / computers, networking

  Using EtherChannel for high availability on Cisco switches

  07.21.08 | Permalink | 11 Comments

  When building high availability networks or systems the three golden rules are: No single points of failure All failovers are automatic and swift Use non-proprietary technologies where possible When coupling server to the network I myself quite like using EtherChannel. EtherChannel allows multiple physical Ethernet links to combine into one logical channel, which allows the [...]

• ict / computers

  PowerDNS – I like it!

  07.03.08 | Permalink | Comment?

  As a long, long, long time user of Bind (and quite frankly not being the only one by far) I’m afraid I’m losing faith. Yes, Bind still does what it does (which is: being a kickass name server or DNS) and does it well,but today a colleague introduced me to PowerDNS. Whoa! Why I like [...]

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