He has asked me not to name him. Suffice to say, he has been working in the field both maintaining and building nuclear plants for many years and in several countries. The man knows his trade. The following is his summary:

What I know about Fukishima follows and has been taken from the International Atomic Energy Agency – IAEA ( http://www.iaea.org/press/ ), the Canadian Nuclear Association – CNA ( http://twitter.com/talknuclear ), Canadian Nuclear Safety Commission – CNSC ( http://cnsc.gc.ca/eng/mediacentre/updates/march-11-2011-japan-earthquake.cfm ) websites.

There were two totally separate, but connected, events.  The first was the earthquake which at 8.9 on the Richter scale was greater than the 8.2 (standard required) against which the plant was constructed.  This meant that the actual forces were seven times greater (the Richter scale is log, not a linear scale).  That being said it appears that the plant withstood the event and the after shocks and is demonstration that it has been robustly constructed.

The the three operating Fukishima plants, along with all other nuclear and fossil plants in the affected areas, were automatically shutdown (as per design).  The earthquake caused electricity pylons to collapse and as a result no external power (from unaffected areas in Japan) was available to run the motors of the pumps required to pump cooling water into the reactor units.  So, as designed, the standby diesel generators started automatically and provided the necessary power.  All was in order and running per design.

About an hour following the earthquake a tsunami occurred.  This huge wall of water caused these diesel generators to fail.  It is unclear to me as to precisely what happened; the available data suggest that the diesel fuel was either cut off or contaminated by water.  In either case the result would have been the same – loss of power generation.  So now the next back-up power supply was employed and that was from the batteries which were used until they ran down.  At this point all forced cooling would have been lost.

Since that time I am led to believe that large “transportable” diesel generators and fuel have been delivered to the site and power restored to the pumps (how much power and how reliable the supply I do not know) to cool the fuel.  It would appear that the explosions and fires may have impacted on the “recovery” process.

The essential thing is to ensure that the fuel is cooled.

Following reactor shutdown the heat from fission is immediately cut off, however the decay heat remains.  Somewhere between three and six percent % of full power, assuming 3000 MW thermal, (probably about 90 to 180 MW thermal – the equivalent of 90,000 to 180,000 electric kettles) is the amount of heat being provided by decay heat from fission products.  This heat input drops over time as the fission products decay.

If the cooling is lost then the fuel cladding (a zirconium alloy) will heat up.  As the cladding heats significantly above its normal about 350 degrees C temperature (when reactor is at power) a reaction between water and zirconium is possible.  In this case hydrogen can be generated as the zirconium picks up oxygen (water is made of hydrogen and oxygen).  [You may recall the issues with HMS Sheffield during the Falklands war which were compounded by high temperature water metal (aluminium) reactions leading to hydrogen production.]  This hydrogen is in addition to that is added on purpose to control corrosion when under power operation.

Hydrogen at concentrations between 4 to 75 percent in air forms an explosive mixture.  An explosion will occur should a spark and/or sufficient energy be available in this concentration range.  The explosions that have occurred in the Fukishima units were the consequence of hydrogen air mixtures existing in vent pipework/ducting.  The consequence has been to damage the exterior of the building but not damage the area in which the reactor is housed.  The hydrogen had to be released due to pressure build-up primarily due to steam.

Back to fuel in the reactor.  The zirconium water reaction at about 1100 degrees C (water is now steam) becomes exothermic (gives out heat) and the alloy will get hotter, hence keeping the fuel cool is essential.  The zirconium alloy melts at about 1850 C.  Once the alloy has melted then the fuel is now exposed.  The fuel starts out as uranium dioxide.  Uranium dioxide has excellent properties to capture fission products.  As the hot fuel oxidizes on exposure to water/steam the uranium oxide (structure) changes.  The ability of the fuel to hold fission products is reduced.  At this point the volatile fission products can be released.  The filters in the venting systems are designed to retain these volatile fission products. If the venting system has been damaged then the extent of that damage will affect the fission product retention capability.

Fuel in the cooling pond/bay.  Fuel from Unit 4 is in the cooling pond. Even though this fuel was removed some months ago heat from decay of fission products must still be removed.  Should cooling be lost the bay water temperature will increase and similar reactions to those described above with the zirconium are possible.  However, the immediate danger is reduced as after about 40 days the majority of the remaining radioiodine will have decayed away, but other longer lived fission products will remain.  HOWEVER, I have been reminded that this is not CANDU (natural uranium isotopic 0.7%) but enriched (U-235) fuel and in one unit mixed oxide (U & Pu) fuel.  In order to prevent criticality in the spent fuel bay  soluble poison is used, usually a boron compound in BWRs.  The bad news is that if a bay drains there is the possibility of a criticality event.  The good news is that fuel that has been used (“burned”) has reduced fissile (U-235/Pu-239/Pu-241) content.  That being said, the fact that the fuel was enriched initially means that the fissile content will certainly be greater than for CANDU fuel.

I have recently heard that the fuel pool, or cooling pond, of one unit has drained and that the fires may have been related to hydrogen generation from the zirconium steam interaction described above.

At the start of this event I was fairly upbeat about the issue with respect to Japan and Fukishima area.  As time has passed and we have learned more, I have become less optimistic that the issue will be solved easily and quickly.  The good news as far as Countries to the west of Japan is that the prevailing winds are to the east – towards the Americas.

With respect to the Uk and Canadian reactors I believe safety is more than adequately covered.  In all honesty I believe that the CANDU reactors are the safest in the world.

He has also passed on to me the following presentation. Alas, it’s in Microsoft Silverlight and so I can’t see the thing. Hopefully it will be of interest to you though.

Presentation Details:
Title: Public seminar on Fukushima event
Date: Thursday, March 17, 2011
Time: 7:00 PM EDT
Duration: 3:00:00

http://mediasite.uoit.ca/mediasite/Viewer/?peid=158b513526014159b694242e7f922dad

• Fullscreen (Host+F)
• Hidden Menu (Host+Home. This only works in full screen)
• View>Virtual Screen 1>Use Host Screen 2

Voila. Simple once you know.

When you go to open a new python project hit the ‘Please configure an interpreter..’ link. Then click the Auto Config button. Ok. Apply. Ok. I’m on Ubuntu Lucid 10.04 so my grammar is 2.6 (you can find your version in the terminal via:$ python –version ). Your interpreter is Python. Finish. And you’re done

Brendan didn’t really have as structured a talk, and one wonders if perhaps he relied more on gimmicks in his slides than the message he was trying to convey. The method he calls ‘Boil, Simmer, Reduce’ is basically his three part plan in creating a product. Frankly it seems a very logical, if not slightly fluffy minded way to work.

Boil
This is basically filling your head with stuff. So it’s just about throwing anything and everything in to the ideas pot. When you embark on a development process you are already indirectly thinking about it all the time, whether you are watching a film, reading a fictional book or just contemplating the meaning of life. The premise is just to be grabbing ideas from all over the place and throwing them all in.

He also pointed out when discussing shots from films he likes that symmetry in itself makes things pretty.

Simmer
This is looking at all considerations of what you want. It is important that you’re not considering technical restrictions, but rather getting down to the nub of what you’d like to do. As with the Boil stage, there are no rules, you can really just do whatever you like.

Around this point Brendan suggested that good design can breed good behaviour. He spoke of work he did for a tourist information office using Microsoft Surface as a map display. There were discs which they would place on the surface which would represent hotels, and by placing that on the map it would create a ring around that item with dots showing where the hotels are in that surrounding area. By turning the disc it would amplify the area of interest. This was in Manchester and it was quite a rough area of the centre of town – “a high proportion of scallies”. The place was concerned that the discs would get stolen. But it was a beautiful space that they created through design, and nothing was stolen. He argued that this proved his belief that “good design can bring good behaviour”.

Reduce
“A design is finished when there is nothing left to take away”. Take the iPhone. It’s such a simple design, one button, an absolute minimum and it’s the sort of thing where anything can be placed on it. It can be anything you want it to be.

You should justify everything shown on a screen. This doesn’t necessarily mean that everything must serve a purposeful action. His favourite thing about the iPhone was that when you scroll up and get to the top, it creates a little bit of space with nothing underneath which simply springs back when you let go. This doesn’t really serve a purpose, bar perhaps a small mental indicator. It is just a little piece of aesthetic satisfaction. It’s just nice. That in itself can justify the feature.

He talked a bit about how he made something for the iPhone which was born out of a need. He wanted to watch a film on a train journey and couldn’t get his iPhone to sit in a good position, so he made a simple piece of cardboard that evening that would just clip onto the side. They thought it was sell-able and went through a few iterations. There was one which was so close to being right but it just wasn’t quite there. They then decided to apply Da Vinci’s Golden Ratio to the position of the cut in the rectangle. That was it. Fixed.

He also mentioned how he thinks the pencil is absolutely wonderful in design. A few of reasons he mentioned were:

1) It has a big arrow pointing to which end you use.
2) Built-in progress bar.
3) You can cut it up, and make many more of the same with it.

New ideas like this still apply to the old and best designed products.

I went to four talks on four very topics, which is perhaps a little surprising considering the focus of the day: Non Profits and Tech engagement

Social Monitoring

This was a two part talk with the focus being on monitoring information within social media. This could take the form of following discussion on a topic relevant to a charity’s engagement, or could equally be applied to monitoring a brand activity. I noted two tools in the first half which I thought could be of use. The first was Social Mention, which is best used for tracking social sentiment on the various social networks (Twitter, et al). The second was Board Tracker, which can be used for checking various forums for keyword mentions. There was also discussion of using the advanced mode of Google search. The second half was a brief discussion of a theoretical Twitter filter that would allow someone to summarise the important points of conversation using an quasi-AI approach. The interested parties of which broke of into a group to discuss the implementation of the project.

FLiP

This was a talk given by my boss Dave Fletcher. I was involved in the projects inception at the Jailbrake weekend hosted by Social Innovation Camp, so I was very interested to see how the project had progressed. I was pleased to hear that even after talks with various authorities and forthcoming pilot runs, the project had retained its original good ideas; to get friends to help you identify your key skills in a structured and playful format which will hopefully aid you in gaining employment. This is such a promising project and I feel really proud for even the small part that I played in its creation.

Giving What We Can

Well this talk absolutely blew me away. It was one of those ones that starts interesting and makes you chuckle and finishes with you feeling shocked at what you’ve learnt. The presenter, Toby Ord, has actually appeared in various mainstream media publications discussing his project, but as he readily pointed out, it isn’t a message designed for the 140char social conversation. I think it would be difficult for me to do him justice. This is a man who has such belief in the difference he can make to so many peoples lives that he is pledging to donate a significant portion of his income for the rest of his life. His argument is convincing and I sincerely hope you will visit his site, givingwhatwecan.org and take the time to read what he has to say.

Music, The Ultimate Non Profit

The last talk I went to was actually more for fun than engagement, but considering my rock background I really can’t be blamed This was Ben Walker of Twitter song fame discussing his life as a niche geek semi-celebrity. Fun and quirky.

All in all, I had really fun and interesting time. I will certainly be going to another Barcamp at my next chance. Barcamp Non-Profits will be coming back, perhaps in spring and probably in London next time. You can find out more by going to barcampnonprofits.com or by following them on Twitter @barcampnfp. If you get the chance make sure you go.

Marty Neumeier – The Designful Company

As I’m sure you can imagine, I only made some quick notes as I was listening to the talk, so what you will find here is an amalgamation of the talk and my own thoughts. Please do not consider this as their words or even mine.

I don’t know much about any of the dConstruct speakers – Marty from first appearance was a middle aged gentleman, smart with suit jacket, jeans and shoes.  This seemed to be a common style amongst the new media gang. Fashion aside, Marty’s talk was a discussion on branding and getting a good product within a brand. To this end he reference many tech business luminaries, though like most people there he was an Apple-afficianado. For example, he was fond of a particular Steve Jobs anecdote. ‘After a marked increase in sales, Jobs was asked “how do you intend to keep this up?” To which he replied: “we intend to keep innovating”’. Marty had a theme which he both uses as his opener and closer, very neatly done too, and it is simply this: “If you wanna innovate, you gotta design”.

Marty’s assertion was that Harvard business school teaches by case study, solving problems by looking how they have been solved previously. This is counter to successful tech businesses and brands, as is testament with Jobs’ statement of the importance of innovation.

So he talked about what really gets a product there is where you need to be designing, on that edge between radical and useful, those differences between what’s good and different. He talks about that traditional style brand-development where to go for something different is a risk, and many a CEO wouldn’t take that risk. The problem is if you don’t take that risk, there is a good chance of the brand dropping into obscurity. Consider the ubiquity of swoosh logos and then globe logos and how their commonness means the brand becomes unmemorable.

So, what are some of the most successful brands and how does one get there? Marty presents a path to follow in brand development where you have the vision at one end of the scale, and the product at the other end of the scale. He suggests that to be successful you’ve got to get from one end of that scale to the other. The path to follow has three stages: knowing, making and doing. It is to this end that you need a clear visionary that can manage these stages. One needs a leader who can picture the goal, has the resources available to build the product and impetus to actually put this together without diluting the vision or compromising on the product development.

Marty also talked about how business is speeding up…  I’ll be honest, I’m doubtful, I feel this is a cliche statement that many people make based on regurgitation. Still, he made a fair point and one that is difficult to dispute, but it could do with some kind of citation. “There are now more financial transactions in one day than the whole of 1965″.

So, what do consumers want? Well, we’ve always said these things: Pick two; good, cheap or fast. What he pointed out though, is that consumers have a new demand, they want free, perfect, now. So if you want your product to be successful you’ve got to give it everything. Let’s be honest, this is something we expect when one considers products like Google docs.  He then pointed out that just to be free, perfect and now isn’t necessarily enough! In an ever-cluttered market place you have to be really different, not just a little bit different, but really different. He talked about how we organise information in our mind using categories and compartmentalisation. So what you’re ideally looking for in a product is to get it in one of those compartments by itself.  So take the example of a smart phone – you want to have your product there by itself, like the iPhone, which for some time everyone thought of as the only smart phone. A successful brand is a walled category.

Historically, to make your product a successful one you would have started with factories. By having factories you can product more than anyone else, you can supply for the demand, you’d be at an advantage. When others realised this and everyone built factories, the next step was to get the most capital, allowing you to buy out the competition. After capital was patents. Patents were a means of securing your market. Of course they can only work for so long. So the final stage is where we are at now, brands. This saves a certain amount of process because in people’s own minds they will compartmentalise and protect your brand for you as a consumer. So, to summarise, we are talking about how in the past it was very much physical – factories and a physical present which keeps your product dominant in the market, whereas now it’s a mental thing within the mind of the consumer.

If a brand is good and different, it’s a gut feeling. Your brand is what the consumer says it is and for you to stand out, that’s where you have to be really different. Example – if we have Nike, do we need Reebok? Do we need Wimpy if we have McDonald’s?  A brand has to be truly radical and good, which is indeed a big risk.

I think in all the Apple-loving I heard on this day there is a tech brand that is more ubiquitous than iProducts will ever be: Linux. How different is that? Totally radical, and it’s everywhere. Just my 2p.

Marty presented a scale with which to measure brand success using the variables of good versus different on the z and y axes. He believed a brand generally fell into one of four sectors:

1) good, not different – common, does well in tests, and at first sales, but never really dominates its market.
2) good and different – this is the sweet spot. Often does poorly in tests, which means if often won’t get to market, slow in market, but customers will in time equate the weirdness to good : and eventually it will take a dominant position in the market. Example: Aeron chairs. (btw, I love Aeron chairs
3) not good and different – won’t do well in tests, and won’t be successful, people will equate weird to bad.
4) not good and not different – you just don’t want to be here, do you? But, this one often does well in tests because it’s not different, so it’s familiar to people. But it doesn’t challenge.  A surprising amount of products sit here, like Gillette fusion razors. Five blades. Five. Whoop-de-doop. Not exactly going to dominate the market.

As your brand visionary leader man, there are four key things you need:
1) empathy
2) intuition
3) experience
4) judgement

Let’s finish how Marty did. If you wanna innovate, you gotta design.

Close Eclipse.

Delete:  /path/to/workplace/.metadata/.plugins/org.eclipse.jdt.core

Open eclipse and let it rebuild its indexes. Job done.

I’ve been keeping my head down for some time now. I’ve really been wanting to get good at what I’m doing before I start to think of other things. But I’m happy to say that recently I’m starting to ‘get it’ with many of the techs that I’m using. I know I still have sooo much to learn, but it’s a good feeling to be making progress.

Oh yeah, I use Ubuntu for both work and play now. Good times

Hmm, what else is new… I move in a couple of weeks, to a place in Headington. At the moment there are five of us living in a four bedroom house in East Oxford. It’s fun and communal and all, but I’m really looking forward to moving in with just myself and Emily. You should check her blog by the way: emilychiang.wordpress.com.

Actually, I think that’s it for now. Take care.

I recently got a reasonable size list of blog URLs. What I wanted was to import all these into a feed reader (via OPML). There seemed to be a lack of conversion scripts for batch URL->find RSS link->feed reader import file (I may be wrong, please let me know if I am , so I made one in PHP. I guess this is like an automatic-blogroller. I have just used this as a command line script, I’m not recommending you use this in ‘the wild’ as one might say, I have made little concession to security as I had a trusted list of URLs.

There are basically three steps to this

1. Take an input file of newline seperated URLs, in my case blogs.
2. Find (auto-discover) associated RSS feed of each blog URL
3. Output an OPML file that you can use to import into a feed reader

What it does:

• Takes a well formed list of newline separated URLs of blogs and turns it into an OPML
• If the URL source doesn’t contain a <link> to an RSS feed in the head it doesn’t add it to the OPML
• Detects the <title> and adds that to the OPML text field, or uses the URL if <title> isn’t present

What it doesn’t:

• Check the RSS feed is validated XML
• Any other checking really
• Come with any sort of warranty/guarantee

Some of the key functions are from Keith Devens work. Thanks.

Without any further ado, here is the script:

<?php
/*
 * @author @skinofstars Kevin Carmody
 * GPLv3 - http://www.gnu.org/copyleft/gpl.html
 *
 * this is really a command line app with no flags
 * for turning a bunch ofurls into an OPML file
 *
 * 1.takes input file of newline seperated urls, normally blogs
 * 2.finds (autodiscovery) associated rss of each url
 * 3.outputs an OPML file for you to use in a feed reader
 */

// file config
$inputFile = "/path/to/URLlist.txt";
$outputFile = "/path/to/blogroll.opml";

// OPML config
$opmlTitle = "Some Select Blogs";
$opmlOwnerName = "Kevin Carmody";
$opmlOwnerEmail = "kevin@skinofstars.com";

/** no need to edit after this   **/
$inHandle = @fopen($inputFile, "r");//read-only
$outHandle = @fopen($outputFile, "a");//append

if ($inHandle && $outHandle) {
	$headerOut = opmlHeader($opmlTitle,$opmlOwnerName,$opmlOwnerEmail);
	fwrite($outHandle,$headerOut);

	while (!feof($inHandle)) {
		$buffer = fgets($inHandle, 4096);
		$source = getFile($buffer);
		$rssURL = getRSSLocation($source, $buffer);
		$rssTitle = htmlentities(getTitleAlt($source));
		if($rssURL){
			if($rssTitle){
				$entryOut = opmlEntry($rssURL,$rssTitle);
				fwrite($outHandle,$entryOut);
			} else {
				$entryOut = opmlEntry($rssURL,$rssURL);
				fwrite($outHandle,$entryOut);
			}
			//echo ".";//uncomment to print a dot to screen on each success, nice for seeing progress
		} else {
			echo "Fail on: ".$buffer;
		}
	}
	$footerOut = opmlFooter();
	fwrite($outHandle,$footerOut);

	fclose($inHandle);
	fclose($outHandle);
} else {
	if(!$inHandle){
		echo 'not got a handle on input file: '.$inputFile."\n";
		die;
	}
	if(!$outHandle){
		echo 'not got a got handle on output file: '.$outputFile."\n";
		die;
	}
}

echo "\nAll done  \n";

/**
 * basic opml header
 * @param string $opmlTitle
 * @param string $opmlOwnerName
 * @param string $opmlOwnerEmail
 * @return string
 */
function opmlHeader($opmlTitle,$opmlOwnerName,$opmlOwnerEmail){
	$oheader = "<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>\n"
	."<opml version=\"1.1\">\n"
	."	<head>\n"
	."		<title>".$opmlTitle."</title>\n"
	."		<dateCreated>".date("r")."</dateCreated>\n"
	."		<ownerName>".$opmlOwnerName."</ownerName>\n"
	."		<ownerEmail>".$opmlOwnerEmail."</ownerEmail>\n"
	."		</head>\n"
	."	<body>\n";
	return $oheader;
}

/**
 * just returns a test footer
 * @return string
 */
function opmlFooter(){
	$ofooter = "  </body>\n"
	."</opml>";
	return $ofooter;
}

/**
 * creates an XML entry for the OPML file
 * @param string $feedURL
 * @param string $feedTitle
 * @return string
 */
function opmlEntry($feedURL,$feedTitle){
	$outline = "    <outline text=\"".$feedTitle."\" type=\"rss\" xmlUrl=\"".$feedURL."\"/>\n";
	return $outline;
}

/**
 * returns the page title extracted from source
 * @param string $html
 * @return string
 */
function getTitleAlt($html) {
	if (preg_match('/<title>(.*?)<\/title>/is',$html,$found)) {
		$title = $found[1];
		return $title;
	} else {
		return;
	}
}

/**
 * http://keithdevens.com/weblog/archive/2002/Jun/03/RSSAuto-DiscoveryPHP
 * public domain
 */
function getFile($location){
	$ch = curl_init($location);
	curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
	curl_setopt($ch, CURLOPT_HTTPHEADER, array('Connection: close'));
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
	curl_setopt($ch, CURLOPT_TIMEOUT, 15);
	$response = curl_exec($ch);
	curl_close($ch);
	return $response;
}

/**
 * http://keithdevens.com/weblog/archive/2002/Jun/03/RSSAuto-DiscoveryPHP
 * public domain
 */
function getRSSLocation($html, $location){
	if(!$html or !$location){
		return false;
	}else{
		#search through the HTML, save all <link> tags
		# and store each link's attributes in an associative array
		preg_match_all('/<link\s+(.*?)\s*\/?>/si', $html, $matches);
		$links = $matches[1];
		$final_links = array();
		$link_count = count($links);
		for($n=0; $n<$link_count; $n++){
			$attributes = preg_split('/\s+/s', $links[$n]);
			foreach($attributes as $attribute){
				$att = preg_split('/\s*=\s*/s', $attribute, 2);
				if(isset($att[1])){
					$att[1] = preg_replace('/([\'"]?)(.*)\1/', '$2', $att[1]);
					$final_link[strtolower($att[0])] = $att[1];
				}
			}
			$final_links[$n] = $final_link;
		}
		#now figure out which one points to the RSS file
		for($n=0; $n<$link_count; $n++){
			if(strtolower($final_links[$n]['rel']) == 'alternate'){
				if(strtolower($final_links[$n]['type']) == 'application/rss+xml'){
					$href = $final_links[$n]['href'];
				}
				if(!$href and strtolower($final_links[$n]['type']) == 'text/xml'){
					#kludge to make the first version of this still work
					$href = $final_links[$n]['href'];
				}
				if($href){
					if(strstr($href, "http://") !== false){ #if it's absolute
						$full_url = $href;
					}else{ #otherwise, 'absolutize' it
						$url_parts = parse_url($location);
						#only made it work for http:// links. Any problem with this?
						$full_url = "http://$url_parts[host]";
						if(isset($url_parts['port'])){
							$full_url .= ":$url_parts[port]";
						}
						if($href{0} != '/'){ #it's a relative link on the domain
							$full_url .= dirname($url_parts['path']);
							if(substr($full_url, -1) != '/'){
								#if the last character isn't a '/', add it
								$full_url .= '/';
							}
						}
						$full_url .= $href;
					}
					return $full_url;
				}
			}
		}
		return false;
	}
}

Though this was really a one time hit for me it may well be useful to others. Please let me know if you can think of ways to improve it and I will update accordingly.

Thanks,
Kevin

So I’ve spent this week moving our company hosted SVN from Beanstalk to Springloops. I feel I’ve been swinging between hell and zen, but the learning has been awesome. As a summary of what I’ve found I thought I’d give a quick walk through how I did it.

Most of this stuff was the usual dump/load cycle, but there are a couple of things which needed some extra attention.

Firstly, both Beanstalk and Springloops have the ability to export and import SVN dumps via easy-to-use web interfaces. This really could be as easy as download, upload. Try that first.

We had a couple of problems though. Previously we had a mishmash of company repos and project repos; these had to be merged and sorted. We also had different usernames on each system(!) which meant that during an import previous commits were not matched to current system users.  The author attribute needed to be updated for all previous revisions.

This was all done on OS X, but should be applicable to any Unix-like with the appropriate libraries, etc.  So we’ve got our dump from Beanstalk, now we just need to create a local repository to do our work on (always work on a backup!!).

$ svnadmin create --pre-1.4-compatible newrepo

We use the pre 1.4 compatible flag to overcome files system changes within SVN between versions. These changes can potentially cause errors (svn: Expected FS format ’2′; found format ’3′) when propset-ting revision histories, in my case, author/committer names.

Next job, import your dump file.

$ svnadmin load newrepo < dumpfile

If you’re looking to do the merging, as I was, then you want to make yourself a directory in your repository (usual ‘svn mkdir’ commands) and then load it in the following fashion:

$ svnadmin load newrepo --parent-dir myfolder < seconddumpfile

Ok, we’ve done our merging, now we’re going to update our author histories.  Now the SVN manual gives you information on doing this one version at a time with a propset.  It also talks about other recursive actions such as deleting files, which isn’t our concern.  For changing authors, I found a tidy script called svn-author-tweak.py from CollabNet.

If you want to give your repository a check before you upload it, just checkout to a local test.

$ svn co file:///path/to/newrepo /path/to/test/repo

Once that’s done, dump the file.

$ svnadmin dump newrepo > my.dumpfile

Upload

???

Profit