Wireless IP KVM mk II

By | Technical | No Comments

If you have been following this blog for a while you might have seen my previous article on the portable, wireless IP kvm that we constructed a while back for datacentre use. This has proven to be an invaluable tool for remotely accessing machines instantly, in fact so invaluable that contention for its use frequently […]

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Large filesystem “support”

By | Technical | 2 Comments

I’ve written recently on how to handle systems with very large storage subsystems. One would think that as we make our way through 2009 that the supporting tools for such large filesystems are at the top of their game, but as I’ve been playing with 24TB of storage I’ve realised that this is hardly the […]

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A delicate balancing act

By | Technical | No Comments

In our day to day use of computers, we try to forget as much about the boring, inane things and concentrate on the cool, useful or interesting things (like lolcats). Unfortunately for us, there are quite a few things which are boring and inane, but are also very important. One of these things is IRQ […]

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Pain-free server migration

By | Technical | No Comments

Being the veteran of a datacentre migration and several whole server migrations I feel like I’m getting the process down to a reasonably fine art. I had to perform another migration last night from another datacentre to ours at Global Switch and the process went very smoothly so I thought I’d share some of the […]

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Standards? Who needs standards?

By | Technical | No Comments

Anyone in the sysadmin or developer worlds will know many examples of flagrant violations of standards in the IT world. Some are perpetrated by our coworkers, but a surprisingly high amount are perpetrated by vendors. Not all of them are by Microsoft, either! One big win for systems administration at Anchor is our use of […]

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IPv6 Implementors Conference

By | Company News, Technical | No Comments

I was dropped a quick note by one of the speakers at the IPv6 Implementors Conference which is being hosted by Google – http://sites.google.com/site/ipv6implementors/conference2009/ Sadly I had no idea this conference was on, as it looks like a valuable opportunity to learn about IPv6 and the progress it is making in the wild. I did […]

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BGP Data Visualisation

By | Technical | No Comments

If you are among the upper echelon of network administrators who happen to have BGP administration within their scope of duties you probably have access to a lot of interesting, albeit quite verbose, information about the Internet at large. Generally, any network with a BGP configuration accepting a full feed from their upstream will have data […]

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Filebucketing to the MAXXXXX

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Every now and then we see an example of application failure so astounding it literally brings tears to our eyes. We have a client whose legacy application is unfortunately still running on an ancient version of Oracle Weblogic and which must be maintained until the new, flashy .NET version of their site is complete. We […]

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Tracing I/O usage on Linux

By | Technical | One Comment

I/O subsystems are a whole industry of their own, and many libraries could be (and probably have been) written on the subject already. The particular sub-topic I’m talking about today is when you are faced with a machine that you suspect to be suffering from heavy I/O load, and you want to find the culprit. […]

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nsscache and LDAP reliability

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Any company with multiple servers in their authentication domain will know of LDAP. Sadly on the Linux platform, OpenLDAP (although arguably the most widely used and well known of the few LDAP servers available) is still not particularly reliable, especially when it comes to replication. The overheads involved in querying even a local OpenLDAP server […]

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