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	<title>thattommyhall.com</title>
	<link>http://www.thattommyhall.com</link>
	<description>A Random Walk Through Idea Space</description>
	<lastBuildDate>Wed, 17 Feb 2010 01:14:09 +0000</lastBuildDate>
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	<item>
		<title>How many IOPS can a single disk provide?</title>
		<description><![CDATA[[edit]
I wish I could retract that comment about adding:- at the point the seek is done, you need to wait for the platter to spin into place, on average half a turn (the latency time). They do therefore happen in sequence! (If it was not for those pesky disks always spinning, I&#8217;d have been right!). [...]]]></description>
		<link>http://www.thattommyhall.com/2010/02/15/iops/</link>
			</item>
	<item>
		<title>Dan Dennett &#8211; Darwin&#8217;s Dangerous Idea</title>
		<description><![CDATA[I&#8217;ve just uploaded this to bookcrossing.com , if you want it &#8211; get in touch.
I said I would start to do brief reviews for all the books I read (especially as I intend to release most of them on bookcrossing) so here is this one (also on goodreads.com)
Dan Dennett is one author who has genuinely [...]]]></description>
		<link>http://www.thattommyhall.com/2010/02/14/darwinsdangerousidea/</link>
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		<title>New Site Launched &#8211; UKblazers</title>
		<description><![CDATA[Well, I went and launched a site to get some ideas down for getting some Backblaze Storage Pods in the EU and what to do in the software stack to get robust file and block level storage ontop of those bricks.
It is over at http://ukblazers.com, a blog and a wiki. 
Someone else had started around [...]]]></description>
		<link>http://www.thattommyhall.com/2010/02/09/new-site-launchedt/</link>
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		<title>Cultural Adventures</title>
		<description><![CDATA[The last two weekends I have traveled across to London from Faversham to see friends and visit a few museums.
During the weekend of 9/10th I met up with my sister in the British Museum and showed her around (one of my 101 goals ticked off in the process). I was very pleased to finally see [...]]]></description>
		<link>http://www.thattommyhall.com/2010/01/22/cultral-adventures/</link>
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		<title>Building A Backblaze Storage Pod</title>
		<description><![CDATA[A while ago I saw the Backblaze storage pod and was impressed.

Like many others I thought:

I want one
Wouldn&#8217;t it work great with ZFS
The hardware sucks

Building one
I used to make and sell storage servers using Linux a while ago with media streaming software and easy setup (before all the ready-rolled ones came out) so the software [...]]]></description>
		<link>http://www.thattommyhall.com/2010/01/05/building-a-backblaze-storage-pod/</link>
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		<title>101 Goals in 1001 Days</title>
		<description><![CDATA[I have decided on a kind of hyper-resolution for the new year, 101 goals in 1001 days.
I have a mindmap of the ones I have settled on so far and have started working on some of them already.
To follow (allowing me to tick off some of the meta-goals):
Success criteria for each
Divide them up into &#8220;Sustained [...]]]></description>
		<link>http://www.thattommyhall.com/2010/01/03/101-goals-in-1001-days/</link>
			</item>
	<item>
		<title>Can Google create community?</title>
		<description><![CDATA[I have been meaning to blog for ages about a site I use called Goodreads. It is really excellent, I signed up ages ago and cant remember exactly how I found it but I think it might have been a Rails app. Anyway, it is a fairly simple idea, log what books you read (or [...]]]></description>
		<link>http://www.thattommyhall.com/2009/09/30/can-google-create-community/</link>
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		<title>Getting VMware Certified Professional (VCP) on vSphere 4</title>
		<description><![CDATA[On Saturday I took and passed the VCP410 exam to get VCP4. 
It was not really that hard, though I have been reading about vSphere since before it shipped, follow loads of blogs on VMware, installed it as soon as it came into beta and migrated my companies clusters to it relatively early. I would [...]]]></description>
		<link>http://www.thattommyhall.com/2009/09/28/getting-vmware-certified-professional-vcp-on-vsphere-4/</link>
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		<title>Hiatus, Departure, Return</title>
		<description><![CDATA[It&#8217;s been ages since I blogged as I have been mad busy in work though a lot has happened recently.
I have:

Left thebigword
Packed up my house
Sold/Gave away most of my possessions (keeping only books and my PC, as my friend Ben said &#8220;proves you are principally concerned with knowledge&#8221;)
Left Leeds
Gone to India
Returned (earlier than planned but [...]]]></description>
		<link>http://www.thattommyhall.com/2009/09/22/hiatus-departure-return/</link>
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		<title>FusionIO ioDrive</title>
		<description><![CDATA[Well, I got my hands on one of the fusion-io ioDrives a couple of weeks ago. unfortunately they do not work in the version of VMware ESX that we are using, though they are working on drivers for the 64bit ESX4. I did not have time to set up a physical machine to test on [...]]]></description>
		<link>http://www.thattommyhall.com/2009/07/06/fusionio-iodrive/</link>
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		<title>ZFS, it&#8217;s sometimes good to know how screwed you are.</title>
		<description><![CDATA[I have just had a disk fail on my NAS, actually it happened ages ago but I was too broke to replace it. At the same time as one being faulted, another was degraded through having too many errors. Below is my interaction with ZFS to discover the extent of the problem and &#8220;fix&#8221; it.

(this [...]]]></description>
		<link>http://www.thattommyhall.com/2009/02/11/zfs-its-sometimes-good-to-know-how-screwed-you-are/</link>
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		<title>Christmassy Shizzle</title>
		<description><![CDATA[Last weekend I went down to London again for a Christmas jolly with some great old uni friends, it was a lovely weekend, good wholesome fun.
On the Saturday I went to see the Wallace Collection while some girlies shopped on Kensington Highstreet (where the sales are apparently excellent but I&#8217;m not sure I could have [...]]]></description>
		<link>http://www.thattommyhall.com/2008/12/22/christmassy-shizzle/</link>
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		<title>Byzantium at the Royal Academy of Arts</title>
		<description><![CDATA[I was in London a few weeks ago and saw the wonderful exhibit at the Royal Academy of Arts.
I have been interested in Byzantine history since a historian friend at university described how they were essentially the eastern Roman empire, called themselves Romans, spoke Greek, were Christian and survived well into the Middle Ages. As [...]]]></description>
		<link>http://www.thattommyhall.com/2008/12/06/byzantium-at-the-royal-academy-of-arts/</link>
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		<title>Edinburgh</title>
		<description><![CDATA[I have recently returned from Edinburgh, I caught the tail end of the Fringe festival. It was a good trip, and the first time I have had more than a day off work since February. I saw quite a few acts in the final 3 day.It&#8217;s been ages since I blogged and I&#8217;m out of [...]]]></description>
		<link>http://www.thattommyhall.com/2008/09/13/edinburgh/</link>
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		<title>Summer Fun</title>
		<description><![CDATA[I have been working really hard of late and have decided to block book a load of long weekends this summer and get outdoors a bit. I have been thinking about doing a long distance path for ages and have decided to do one in early August, probably the West Highland Way. It is 95 [...]]]></description>
		<link>http://www.thattommyhall.com/2008/06/15/summer-fun/</link>
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		<title>BodyWorlds In Manchester</title>
		<description><![CDATA[I went a few weeks ago to see BodyWorlds at the Museum of Science and Industry (mosi) in Manchester.
I have only just had chance to get the pics off my phone and am amazed at how well they came out.
    			
All one body, look at the shared foot.

This was the highlight for me, what [...]]]></description>
		<link>http://www.thattommyhall.com/2008/05/10/bodyworlds-in-manchester/</link>
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		<title>Felicini Voucher</title>
		<description><![CDATA[Went here with a friend, pretty yum. 50% off makes it great value too.
http://www.felicini.co.uk/voucher/felicini_voucher.pdf
Expect an update soon on why my brute-forceing below was plain dumb rather than simply naive.

Share on Facebook]]></description>
		<link>http://www.thattommyhall.com/2008/05/09/felicini-voucher/</link>
			</item>
	<item>
		<title>Project Euler 39</title>
		<description><![CDATA[If p is the perimeter of a right angle triangle with integral length sides, {a,b,c}, there are exactly three solutions for p = 120.
{20,48,52}, {24,45,51}, {30,40,50}
For which value of p &#60; 1000, is the number of solutions maximised?
WARNING: CONTAINS MATHEMATICS

You may remember from school



(Difference of 2 squares)
let

and

so


and substituting these into 
gives

Set  and  to [...]]]></description>
		<link>http://www.thattommyhall.com/2008/04/12/project-euler-39/</link>
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		<title>Databases and Lustre on ZFS&#8217;s DMU, New CIFS Stuff</title>
		<description><![CDATA[When I first heard about ZFS and its features, I was intrigued by a comment by Bill More about the possibility  of having a database or other app directly consume the DMU that ZFS uses for filesystems or volumes. After I did a spot of research when editing the ZFS page on Wikipedia I [...]]]></description>
		<link>http://www.thattommyhall.com/2008/04/03/databases-and-lustre-on-zfss-dmu-new-cifs-stuff/</link>
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	<item>
		<title>Two Thumpers For Tommy?</title>
		<description><![CDATA[After me banging on for a year about how cool ZFS is, my boss is finally convinced and wants to get a Thumper (or 2). Depending on budgetary constraints we may be getting a couple of these to implement a warm backup solution for our current data and about 5 years worth from now (they [...]]]></description>
		<link>http://www.thattommyhall.com/2008/04/03/two-thumpers-for-tommy/</link>
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	<item>
		<title>Why are people so credulous?</title>
		<description><![CDATA[
What a load of shit, she clearly cannot make a single correct statement.
Share on Facebook]]></description>
		<link>http://www.thattommyhall.com/2008/03/30/why-are-people-so-credulous/</link>
			</item>
	<item>
		<title>Arithmetic is a great bollocks detector</title>
		<description><![CDATA[Go and read Pupils to get &#8216;new world&#8217; trips from the beeb.
You may think &#8220;trips abroad for kids, great&#8221; , if you are more cynical you may think &#8220;heads choose the kids, not sure I like that&#8221;.
Let us do some arithmetic, 100 kids for 6 weeks each for £1.4M.

£1400000/100 = £14,000 per child
£14000/6 = £2&#8242;333 [...]]]></description>
		<link>http://www.thattommyhall.com/2008/03/29/arithmetic-is-a-great-bollocks-detector/</link>
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	<item>
		<title>tomFS</title>
		<description><![CDATA[As some of you may know I am unusually interested in filesystems. After sending John a link about HAMMER, a new FreeBSD clustered FS and joking about starting a tomFS project, his reply offered some help deciding on features it should have and marketing it.
tomfs can process a huge number of operations in parallel, just [...]]]></description>
		<link>http://www.thattommyhall.com/2008/03/26/tomfs/</link>
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		<title>Geotaged Photos on Flickr, Macbeth</title>
		<description><![CDATA[See the flickr map view or the album.
I walked all over New York yesterday, went along the east side all the way to Central Park and the Metropolitan Museum. The place is amazing. Not quite as good as the British Museum in my view but still a great place, perhaps the architecture is better, I [...]]]></description>
		<link>http://www.thattommyhall.com/2008/03/23/geotaged-photos-on-flickr-macbeth/</link>
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		<title>Tommy In New York</title>
		<description><![CDATA[Landed at 2.30pm yesterday, went straight to our Wall St office and got on with helping them move office. Went and got a bit drunk to help with jet-lag (Being bladdered and knackered in 2 time zones is better than one&#8230; or something)
Got tickets today to go and see Patrick Stewart in Macbeth tomorrow. I [...]]]></description>
		<link>http://www.thattommyhall.com/2008/03/20/tommy-in-new-york-spot-of-culture-tomorrow/</link>
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