Introduction This article follows on from the “Cloud Migrations Crusade” blog post… A single tenancy datacenter is a fixed scale, fixed price service on a closed network. The costs of the resources in the datacenter are divided up and shared out to the enterprise constituents on a semi-random basis. If anyone uses less resources than […]
Read more →Back in the day I had to do quite a bit of COM / .Net interop. For some reason (and I cannot remember what it was), I need to be able to enumerate the COM running objects table (ROT). I think it was to do with createboject/getobject and trying to synthesis a singleton for an […]
Read more →I remember getting weird flashing on my laptop and eventually figured out my icon cache was full. So if you ever get this, try running the script below. This is obviously quite a weird/random post – hope its helpful 🙂
Read more →In technology, there is a tendency to solve a problem badly by using gross simplification, then come up with a catchy one liner and then broadcast this as doctrine or a principle. Nothing ticks more boxes in this regard, than the principle of least privileges. The ensuing enterprise scale deadlocks created by a crippling implementation […]
Read more →I was playing with S3 the other day an I noticed that a file which I had uploaded twice, in two different locations had an identical ETag. This immediately made me think that this tag was some kind of hash. So I had a quick look AWS documentation and this ETag turns out to be […]
Read more →If you need to test out your big data tools below is a useful set of scripts that I have used in the past for aws emr and redshift the below might be helpful:
Read more →So after getting frustrated (and even recreating my ec2 instances) due to a “Permission denied (publickey)”, I finally released that the worpress builds by default as set up for SSH using the bitnami account (or at least my build was). This means each time I login using ec2-user I get: Being a limited human being, […]
Read more →Ok, so I am a windows dude and only after docker and K8 came along did I start to get all they hype around Linux. To be fair, Linux is special and I have been blown away with the engineering effort behind this OS (and also glad to leave my book of Daniel Appleman win32 […]
Read more →This is a short blog, and its actually just simple a plea to AWS. Please can you do three things? North Virginia appears to be the AWS master node. Having this region as a master region causes a large number of support issues (for example S3, KMS, Cloudfront, ACM all use this pet region and […]
Read more →Getting an application knocked out with a simple SYN flood is both embarrassing and avoidable. Its also very easy to create a SYN flood and so its something you should design against. Below is the hping3 command line that I use to test my services against SYN floods. I have used quite a few mods, […]
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