My New Home on the Web

Perhaps obviously, the content on this blog is very old; I have not maintained it in many years. Nevertheless, I still occasionally have people looking for me wind up here. 

If you would like to follow my adventures these days, the best place is Get Smarter and Make Stuff, where I chronicle my adventures attempting to do those two things. It's an umbrella project for a blog, a YouTube channel, and whatever else I decide to add.

As one note, it is NOT generally a programming project. I get enough of that at my job these days, so I focus more on building physical objects. But that line gets pretty blurry when you get into things like CNC, so I'm not saying it won't have ANY software content.

ThinkRelevace: The Podcast, Episode 011

The latest episode of the podcast is available in the usual place. On this one, we talk to Jen Myers, one of our designers. I've worked with her a few times now, and she's great. We had a fun conversation about the various things she's into, most notably Girl Develop It Columbus.

Quite a long time elapsed between recording this episode and posting it. That certainly had nothing to do with my desire to get it out there, but other episodes had tighter timing considerations. So I'm very glad that the schedule cleared enough that we could finally get this one out there.

Go have a listen, already!

ThinkRelevance: The Podcast - Episodes 009 and 010

I've been a bit remiss in posting here. I imagine most people that listen to the podcast are watching out for new episodes over at the company blog, anyway. Still, I wanted to call out these episodes because they're two of my favorites so far.

First, on episode 009, I got a chance to talk to Alan. We talked about Relevance's recent re-launch of our training efforts, which was cool. But my favorite part of the interview was the bit in the second half where Alan launches into a really interesting explanation of some academic papers he's been looking at lately. Good stuff.

On episode 010, I finally got to interview Stu Halloway. I've wanted to have Stu on since the beginning of the podcast. We talked about Datomic, of course, although not exclusively. You can tell by the extensive show notes that we covered a lot of ground.

Both episodes were a lot of fun for me, and I'm already looking forward to having both of these guys on again.

ThinkRelevance: The Podcast, Episode 008

I realize we just released a podcast two days ago, but a) there hadn't been one for almost a month before that, and b) I had already recorded this one with Fogus talking about Himera, his ClojureScript compilation web service. Himera just got a facelift and some new functionality, so it seemed like a good time to put out an episode where we talk a bit more about it.

Of course, we didn't limit ourselves to just talking about ClojureScript. We also hit reading, German rock, and a bunch of other interesting stuff.

Go listen!

ThinkRelevance: The Podcast, Episode 007

I just published ThinkRelevance: the Podcast, episode 007 to the intertubes. Have a listen! We talk to Clinton Nixon (the man so awesome it took two presidents to name him), about his Ruby on Rails setup. Clinton is an interesting guy, and I had fun talking to him.

ThinkRelevance: The Podcast, Episode 006

The latest episode of ThinkRelevance: The Podcast is up. On this episode, I had a chance to talk to Larry Karnowski, mostly about Relevance culture. Relevance has a very interesting set of practices and traditions that are a large part of both why it's so fun to work there and why we're so good at what we do (if I do say so myself). Larry is one of the key keepers of that culture, and he does a great job of explaining what many of those practices and traditions are.

Have a listen!

ThinkRelevance: The Podcast, Episode 005

Ever since I began thinking about doing a Relevance podcast, I knew that I was going to want to have Michael Parenteau on the show. Michael is head of our design department, and a designer himself. He has a great attitude, and brings both that and his considerable talent to everything he does. I happened to be down in Durham the week that we released the new website, which Michael had a big hand in bringing about, so I knew the time was right to have a conversation with him about it.


Check out the latest episode over at the ThinkRelevance blog!

ThinkRelevance: The Podcast, Episode 004

This time, I interview Aaron Bedra, who has left the company. And yes, we knew he was leaving when we did the podcast, which I think is really cool. I like working at a place where we feel comfortable posting interviews with people who have decided to go work somewhere else.

Check out the episode here.

ShadowSpawn Version 0.2.2

Version 0.2.2 of shadowspawn is out. Go download it!

This version fixes issue #14, where shadowspawn wasn't correctly handling options that started with a dash. The biggest problem with that, of course, is that it stopped people from using shadowspawn together with rsync, which is a pretty killer combination. I use that setup myself, and it means I can do things like have dozens of full copies of my hard drive, but files that are the same from one backup to the other don't take up any additional space. Nice.

ThinkRelevance: The Podcast, Episode 003 - Brenton Ashworth on ClojureScript One

Episode 003 of ThinkRelevance: The Podcast is out. We talk to Brenton Ashworth about ClojureScript One. Check it out at http://thinkrelevance.com/blog/2012/01/12/podcast-episode-003.html.

Look, Ma, I'm on the Polytechnicast!

While I was in Minnesota over the holidays, I made a point of going to hang out with my good friend Rob Stenzinger. We talked about nerd stuff, as we always do. One thing led to another, and before I knew it we were recording a screencast about Clojure. Have a look, and try not to laugh too much when I forget the semantics of set literals.

ThinkRelevance: The Podcast, Episode 002 - David Liebke

I'm a little behind on posting this, but the second episode of Think Relevance: The Podcast, is out. In this one, we talk to David Liebke about Avout, a Clojure library for coordinating distributed state changes.

CraigBlog is Back

Well, it was painful, but I appear to have gotten the ol' blog back on the air, including all my old posts going back to 2003, and something like 90% of all comments. The formatting has not survived the trip intact, but everything I've looked at has been at least readable. Here's hoping that my new home is the last one I'll have for a long, long time.

ThinkRelevance: The Podcast, Episode 001

I recently had a chance to sit down with Justin Gehtland, CEO of Relevance, Inc. to talk about everything from how Relevance got started to why Relevance is a B Corporation.

Check it out at our company blog.

And yes, I'm still working on getting all the content from my old blog moved over here. I haven't hit any blockers yet, and have been making good progress.

Interim Post

Unfortunately, my old blog has rather unexpectedly gone off the air. I have all the old posts, and I'm scrambling to get them moved here, but it's going to be a little while before I can complete that process.

Sorry about that.

Update: I managed to get everything moved over. Links should be working, but if you're looking at this post, the chances are that the one you followed didn't. Might I suggest you search for it, including the term "CraigBlog"? The search engines should have indexed everything in its new location by now.

If all else fails and you can't find something, feel free to email me at candera@wangdera.com and I'll dig up whatever it is you're looking for. Thanks, and sorry again!

Announcing ShadowSpawn

One of the great things about working at Relevance is having every Friday to work on non-client work. I've been spending mine on various open-source projects, like Artifact and a core.logic port of The Reasoned Schemer. But I haven't forgotten my Windows roots entirely. One of the things I've been trying to do is to continue to improve hobocopy, the open-source backup tool I wrote that can copy in-use files. I initially released it about five years ago, and in that time it has been downloaded something like 100,000 times. In the half year since I re-launched it on github, it has been downloaded around 15,000 times. So clearly, people are using it, and this is a reasonably successful open source project. 

But as the project has picked up steam again I've noticed that the things people want tend to fall into two categories: 1) fixes for mysterious issues with the Volume Shadow Service that I can't do much about, and 2) feature requests around the copying part of hobocopy. I'm sort of stuck on #1, but on #2 I could actually roll up my sleeves and implement copying of streams, or correctly enabling the SE_BACKUP privilege, or any one of the myriad other things that go into correctly copying a file from point A to point B; it's a surprising complex problem. 

Or I could cheat. 

For a long time now, I've been contemplating an alternate approach. Rather than have a piece of software that would make a shadow copy of a volume and then make copies out of it, I thought it would be handy to have a piece of software that would simply make a shadow copy, temporarily make it available on some drive letter, and then run an arbitrary command [1].  If that arbitrary command happens to be Robocopy, then you've got all the advanced copying ability you could ever want. But you could just as easily use notepad if all you wanted to do was look at a file that was locked. 

Thus was born ShadowSpawn. I worked with the ever-excellent Kim Wolk, and this last Friday we got everything to the point where it works reasonably well. We've slapped a 0.1.0 version label on it and made it available for download. I'm not using it in my nightly backups at home yet, the way I do with hobocopy (I plan to make the switch soon), so consider it to be beta: we expect issues, but it should generally work.

Here's a simple example of how to use it: 

shadowspawn C:\some\directory Q: robocopy Q: D:\some\other\directory

That would snapshot your C: drive, mount the snapshotted version of C:\some\directory at Q:, run the robocopy command against it, and remove the Q: mapping when robocopy finished. More details are available at the website.

Anyway, we hope you find it useful. Feel free to ask for help on the mailing list, or to make a feature request or bug report on the issue tracker.

[1] Indeed, a tool called VShadow lets you do exactly that, albeit in a slightly different way. But I had additional reasons for wanting to take on this project. 

Hobocopy Lives!

 

It’s hard to believe it has already been almost over four years since I wrote
a little tool called hobocopy. The name was a pun on the truly-awesome robocopy, which does a great
many things and is a truly useful tool. Hobocopy doesn’t do a tenth what
robocopy does, but it does do one thing that robocopy can’t:
copy files that are currently in use. It does that by using the Volume Shadow
Service, which is the same facility Windows uses to create Restore Points. You
can read more about hobocopy here
and here.

I worked on hobocopy for a while, but as often happens, I got pulled onto
other things. I tried to see if someone else would pick up the torch, but was
unable to find anyone. Still, at least some people were able to get some use out
of it: there have been something like 100,000 downloads from SourceForge as of
this writing, and I get regular but infrequent questions about its use. So I
felt bad that I had let development languish.

Well, now I work for Relevance, and
they have a
very progressive policy on open source work. Of course I have far more
projects I want to tackle than I could do in a decade of Fridays, but still, I
figured that hobocopy deserves some love. So I’ve been spending a bit of time on
it lately. I've created the hobocopy Google group, and I've moved the code to its
new home on GitHub.

As you might imagine, there’s still a lot to do, but I’ll be
chipping away at it as I’m able to. Help of any sort (including bug reports!)
is, of course, welcome. 

 

2010 - The Year in Review

Forgive me, Internet, for I have sinned. It has been way too long since my last blog post. But I like to have an end-of-year post (here's last year's), so here at the end of 2010 seems an appropriate time to toss out something about what's been going on. This past year was ridiculously full, both from a personal and a professional standpoint. Any one of several of things that happened would have made the year notable.

For starters, we bought a new house and moved into it in June. I love the new place, but of course moving is always difficult, and months later we still have a significant amount of unpacking to do. By itself, moving would have been enough, but my wife and I seem to have a propensity for doubling (or tripling, or quadrupling) down. So at the same time we were moving, we did a major renovation of and rented out our old place, helped my wife's parents move, and took a cruise to Alaska. Right after that, my oldest daughter started Kindergarten, which was quite a shock to the daily routine.

Simultaneously with the move, I finished up at MSDN, having helped to ship VS2010. Having spent almost all of the last decade working in .NET, it made it a great time to make a major change. None of you who read this blog will be surprised that I wanted that change to involve doing Clojure. Clojure is a really interesting language, but also a very new one. We're seeing lots of growth right now, but of course it's a small market compared to what we hope it will be in a year or three. So I was fortunate that I was able to find some Clojure consulting work at Relevance. 

Relevance is a fascinating place. Even aside from the opportunity to do Clojure on a daily basis, I find it to be truly different from anywhere else I've ever worked. They take Agile seriously and (IMO) do it right. And where they don't do it right, well, they have a process for changing the process. It quite literally took me weeks to get used to the pace at which they get stuff done: it is a high-intensity, hard-core, hacker (in the best sense of that word) culture where they also manage to keep doing the right thing by the customer a top priority.

Which is why I am pleased to announce that I will be starting there as a full-time employee on January 3rd. See, I told you that 2010 was a big year: among all the other stuff, it also marks the end of an eleven-year span of being an independent consultant. It was a great run, but I'm genuinely excited about the opportunity to work at Relevance in a full-time capacity. I simply could not pass up the chance to participate in the unique combination of culture, technology, and people. And the people include, of course, my good friend Tim Ewald, who started at Relevance last month. This marks the fourth time we have worked together at one company or another, but the first time we've ever both been employees at the same time.

So 2010 was a year of big changes for me and my family, almost all of them good. What will 2011 bring? I have no idea, but I'm going into it in a pretty good mood. :) 

An Updated Nerd’s Halloween

[Update: corrected a minor typo. Also, I find it heartening that Peter is 70% of the way to his donation goal. Thanks to those that contributed.]

I don’t blog much any more. Partly that’s just blog fatigue (I started in 2003), and partly that’s having two little kids (one of whom just started Kindergarten), a new gig (at Relevance! Doing Clojure!), and having just moved to a new house. But I came across something that’s a pretty interesting, and a bit too long to do full justice to on my Twitter account.

Once upon a time, in a small way, I helped a guy make an awesome Halloween. He emailed me the other day to let me know about his latest project, which is even crazier and more amazing. Check out the picture of what he’s going to try to do:

But he needs some help raising funds. In his own words:

Craig,

It's me again, the guy who likes Halloween more than most humans! This was the post you did on your blog:

http://www.pluralsight.com/community/blogs/craig/archive/2008/10/01/you-think-you-like-halloween.aspx

If you don't remember me [Ed: how could I forget?!], check out the quoted material at the bottom of this email.  I noticed that you're not blogging much lately, but you are using Twitter. I was hoping you could blog and/or tweet about a project I'm trying to do this year. I'm trying to get the word out about my fund raising efforts to build this giant steampunk drilling machine prop (see attached photo) for Halloween this year.  Someone who had emailed me on my site (www.SoCalHalloween.com ) a couple of years ago created this entry on his blog:

http://superpunch.blogspot.com/2010/09/help-fund-building-of-giant-steampunk.html

A plug on your blog (or a tweet) would really help.

I'm using a site called "Kickstarter", which is designed to help do fund raising for any sort of creative project, using Amazon for payments. The rules are really simple: If you make or exceed your funding goal by the specified deadline, you get the money. If you don't make the goal, you get nothing.  In my case, my deadline is October 14, so there are 21 days to raise the money.  Also, people get gifts to thank them for pitching in. Any amount is helpful.  $10? Sounds great.  $20?  Even better.  $50? Say, you *do* care!

Please go to my Kickstarter page for Halloween 2010 to get more information, see how the fund raising works, and (hopefully) donate if you're so inclined: http://www.kickstarter.com/projects/1163328321/halloween-2010-journey-from-the-center-of-the-eart

If there are any problems with line wrapping, here's a shortened URL that will take you to the same page: http://tinyurl.com/2879mqk

I have also modified the main page of the SoCalHalloween website to carry the video, a link to the Kickstarter page, and some pictures.  It also has all the rest of the video and pictures that are always available: http://www.socalhalloween.com

So if, like I do, you think this is a really great idea, consider helping Peter out with a few bucks. Thanks!

Clojure Concurrency Tutorial Available

Update: all six parts are now available. That’s over two and a half hours of Clojurey goodness.

Update: There are now downloadable versions available in wmv and mp4 formats in a variety of resolutions. Just click the download button by each module. Also, the refs module is now up.

A while back, I wrote up some slides on concurrent programming in Clojure that I used at a DC ALT.NET presentation. Since I had them ready, and since Pluralsight has a great infrastructure for doing online training (it’s called Pluralsight On-Demand!), it made sense for me to record the content and make it available. So I have.

I’m happy to announce the immediate availability of the first four parts of my six-part Clojure concurrency tutorial, a screencast. You can find it here. It is freely available, and no registration is required. The final two parts will be available in less than a week.

I wrote the tutorial from the perspective of a .NET programmer who is new to Clojure. I don’t focus on the language itself, but rather the concurrency support in it. However, I don’t assume any prior knowledge of Clojure, so we start by covering just enough language syntax to get us through the demos. From there we dive into vars, atoms, agents, refs, promises, futures, and all sorts of good stuff.

If you’ve been reading my blog, you’ll know I’m a big fan of Clojure. One of the reasons for this - but not the only reason - is its fantastic support for concurrent programming. I like to say that it provides “sanity in the face of concurrency”. If you’re interested to learn more, check out the tutorial, and please – let me know what you think!