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gesteckt1 · 6 years

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A reader named Elmars asked us not to use his surname, but we can’t leave him out because his story is remarkable: kit on the rack you see at right was acquired in the Baltic countries and eventually shipped to the USA where Customs became rather interested in X-Ray images of its UPS batteries.“I am a senior systems engineer running a much larger VMware farm for a cloud-based product for the printing industry,” Elmars wrote. “VMware certification is very expensive and I have yet to find an employer willing to stump up the >$5k for the required courses and certification. They are much more willing to throw me a decommissioned server or other gear - sometimes accompanied with the phrase 'knock yourself out'. With at least one supervisor, I was never really sure if it was meant figuratively or literally.“All told, probably about $3k in my own money invested and it has brought me a lot more benefit than a piece of paper titled 'Certified'.”

An ancient IBM dual P3 server (933MHz eServer x340) with 4GB RAM attached to a 1.5TB SCSI storage shelf, and 1TB internal SATA array. A dual-port Intel gigabit NIC makes sure the network floods the backplane at will. A SATA storage shelf that is a work in progress. Two VMware hosts licensed for Essentials. V5.1. The hosts are IBM x3455 machines with two sockets and four cores each and 48GB RAM. “These came out of an HPC shop in Texas for cheap,” Elmars says. “They replaced a pair of first generation IBM x3950 machines I had picked up in Germany. It was cheaper to replace the x3950 machines than to power them as they together ate 1KW just to run at idle and don’t support ESXI 5.x.” The last machine at the bottom is an old Rackable box with 8GB RAM and a pair of 2nd generation Opterons serving as OpenFiler NAS providing the data stores for the ESXi hosts. Elmars adds: "35MB/s sustained write speed is good enough for me." “An HP switch I don't even remember where I picked up.” Kiwi reader Andrew Gall says his lab only looks a little messy because when he took the shot below he’d lived in his current home for just two weeks.

Here's your chance to re-create the Osborne 1. Only in colour. With networking. And no chance of shoulder dislocation. Thanks to the recent explosion in hobbyist electronics - Adafruit and Arduino, I'm looking at you! - the availability of small off-the-shelf HDMI capable LCDs with driver boards has blossomed. There's a variety to choose from 1.5in up, so a Nintendo-scale 'nanobook' isn't totally out of the question.Davies told us the rig below is: “A CloudStack 2.0 implementation using a mix of equipment including Dell R900, R710, T610, R510, three 2850s and AX150 FC SAN, Equallogic PS6000, Power connect switches and a pair of Cisco firewalls.”“With the HP kit, my company have been very supportive and generous over the years and frankly I can't thank them enough. The Sun kit was donated by a friend who works for a hedge fund outside the UK.Nothing in the rig was new, but Chris says it has nonetheless "been incredibly useful to me over the years".Edward Alekxandr says one important element of his lab, which he uses to “learn (and play!) with VMware vSphere [as] we didn't have budget for a test lab at work, is “one very tolerant partner!”

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Edward says the lab: “Kinda expanded to host some apps for my brother-in-law for his car garage as well, but mainly to give me a sandbox to play around without breaking stuff at work.”What kind of stuff? “I've used it to test out upgrading our exchange server to 2010 before doing it for real, and could we replace our fileserver with Solaris 11 zFS (turns out yes!) and de-duplication,” he wrote.Here's one that makes good use of the RPi's other special characteristics: it's really small and physically lightweight. So hanging it on the ceiling next to a projector isn't going to cause the office Stealth & Safety crew too many sleepless nights. And yes, it's cheaper than a dedicated PC. Thanks to some decent LCD/LED projectors out there, for a number of situations it's much cheaper than, say, a 64in display screen.The RPi is ideally suited to the role of weather station: small, low cost and low power. The RPi makes a great data-logger, and you don't even need a network connection, just a large enough SD card. There tools and Python scripts out there to graph your data, or present it via a web page. And once it's up and running, you can contribute your data to shared sites like the WeatherUnderground.

GPIOs make it easy to hook it up to external sensors directly, or there are weather station boards to available to build. You can avoid a soldering iron altogether too: kits from Maplin or RS (for less than £60) that include all the basic pre-built sensors, or open source tools like Weewx let you talk to professional USB-compatible weather stations.John Robson’s rig, which he used to do some serious work on Seti@Home, represents the most unusual location, as is visible below.The rig is defunct but once comprised 17 PCs “from a P166 (on firewall duties) to a Dual CPU P III 800 (the 1GHz Athlon (water [email protected]) downstairs, all on a 10MB hub (not switch) and running flat out doing SETI@Home processing, with a local data cache of three days.”John notes: “17 PCs in a one bedroom flat was a little excessive, and it has mostly been donated/mothballed.”We’re happy about that, as the roof cavity location of John’s lab looks a far from ideal location for a computer of any sort, never mind 17 humming away producing heat.

John worried about that too, telling us “the tallest machine (on the left) used to run a little warm - the case still has rubber embedded into the top from when the feet of the keyboard melted.”David Given had the most exotic rig, as the server he has set up to drive his website and do what he calls “the usual routing/caching/proxying/firewalling/fileserving roles” has a motherboard built from “a customised Mele A1000 set-top box, based on a Cortex-A8 ARM core with 512MB RAM. For storage it has a 64GB Kingston SSD and 2TB Seagate spinning disk.“The big black square on top which makes it hard to photograph is a sound-absorbing baffle made out of a neoprene mouse pad. The console is an old laptop plugged in via USB.”Ashley Black runs a mail server VPN he uses to access resources at work and a home network from “the little under-stairs cupboard that even Harry Potter would find cramped.”The Reg wishes Tim and all those who took time to send us descriptions and images of their home labs all the best with their efforts. And their power bills.

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Is he having a laugh? Nope, thanks to apps like OwnCloud and BarracudaDrive, you too can jump on the latest bandwagon for under £30. Yes, you really can run a cloud server from your RPi. Why would you want to? The sales pitch is that it avoids the possible privacy issues of Box, Dropbox, iCloud and their ilk, but it also helps to get around over-enthusiastic firewalls at work. Plus, turns out a cloud server on the local network is really just a self-important NAS server. Who knew?As someone clearly on the mortally-wounded side of morbidly obese, I have found it personally upsetting that one can't as yet purchase a set of speak-your-weight bathroom scales featuring a choice of 'No coach parties, please'-style repartee. A niche market missed, I think. No matter. It is but the work of a moment (ahem) to whip up a RPi connected set of scales, and some Python scripts to play and display the appropriate (health warning) message.

Asterisk, the well-known open source telephone tool, will quite happily compile and run on an RPi, handling up to ten calls (or conference participants) without apparent strain. Getting your landline connected to your RPi may take some fiddling, and you'll need some external hardware. There are also options for ISDN connections. Just remember, you're saving on the PC hardware. But if you're just trying it out, you can configure it to use SIP instead. Before you know it, you'll be configuring voice-gaol, caller id, and cheesy country and western hold-music.Here's one just for the non-UK brethren, clearly. Turns out that with some pre-compiled C and a short piece of wire, you can trick the RPi's GPIO pin four into broadcasting FM Radio. How cool is that? So why aren't we being swamped by teenager pirate radio stations? It's certainly illegal in the UK. With a decent 75Ω aerial, a no band-pass filter and a following wind, the mighty calculations say you're looking at a signal strength somewhere in the 9-14mW range, well over the 50nW UK limit. Hey ho.

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