Older blog entries for idcmp (starting at number 69)

Write Better Comments by Tomorrow Morning

I've spent some time recently trying to improve my code comments.  Most of us just write comments without much thought and carry on with the task at hand, however after a couple of weeks of iterative improvement I have some really simple tips that will make you write better comments tomorrow.

Tip 1: Delete Bad Comments

If you're working on a large code base, you'll invariably find some comment that's questionable, but sometimes you'll find comments that are even worse, and those comments simply need to go.  To me, the two kinds of comments that fit in this category are:

  1. Machine generated comments: These tend to be blatant and useless.  "The getFoo method gets Foo." or "The isNotEnabled method returns the value of notEnabled.".  If you're using Eclipse, the shortcut Ctrl-D can be used to delete a line and these comments are ripe for the killing.
  2. Lies: Over time code is refactored, shaped, copy-pasted, "fixed", outsourced, insourced, sold, bought until it eventually winds up in front of you.  During all this ebb and flow, some comments don't keep up with the code.  If the method signature you're looking at is "public List obtainShipments(Locale locale, Country country);" and the comment is "This method will return true if the system can ship to the given country." then you know it's wrong.   If this is not code you're currently cleaning up, then delete it.  
Wait, this sounds harsh.  You should spend the time to rewrite it as a proper comment, right?  Wrong, and here's why.

If you've been a developer for a while, you know the feeling of being "in the zone".  That time where the entire system you're working on is in your head and you can think of side-effects and how everything works.  You're one with the matrix. If you're not working on the methods with the generated comments and lies, then you're not going to add any value trying to write comments and it's going to pull you out of the zone; so don't.

Also, the comments that you see there will leave you (and others) with the feeling that comments are there to help you.  You've probably scanned a class before and thought "Uh-oh, there's almost no comments here, this could be tricky."  With the above two types of comments in that class it gives you a false sense of security.  You've got source control.  Bad comments are worse than no comments, delete them and move on.

Tip 2:  Explain the WTF's

Sometimes the code you're working on has something weird and counter-intuitive about it.  Things that you totally understand, but others may not.  Usually they're the result of bugs or missing features elsewhere in the system.  When you're writing code that works around a bug, go find the issue # in that project's issue tracker and add the full URL in a comment.  Also explain what you would rather the code do if the bug weren't there.  If there isn't an existing bug then file one.  You may discover you misunderstood some functionality or that it's fixed in a newer version.  

If you can't upgrade the library you depend on, mention that the bug is fixed in a newer version in your comment. Also, if you use a dependency management system like Maven or Ivy, add a comment near the dependency "Version 2.1.2 will fix BUG-7509 and then we can remove the workaround in SuperFancyImpl". This tiny investment of time will help the next developer who looks at the code.

Tip 3:  Describe Relationships

More than the other two tips, this tip takes your comments to the next level.

A developer will stumble across your code, following data flow.  They'll want to know why your code is here and how it interacts with other code, so tell them!

Lets imagine a restaurant simulator.   As a developer you find the "Table" class.  Comments like "A table in a restaurant." or "An implementation of a Table." are good Ctrl-D candidates.  Instead, here's something a little better:
"Tables represent a location in a restaurant where customers are served food.  Restaurant Customers attach themselves to a Table which is then served by a number of TableWorkers including the Server Employee and TableCleaner.  It is often allocated by the Reservation system, check CustomerSeater for how Customers are seated.  Constructed Tables usually come from the TableFactory and are always added to the RestaurantBuilding."
Let's take a look at the recipe this comment follows:
  1. Who Am I: If this class represents a business object or business activity, then copy and paste the description from any documentation or planning sessions you've had.  If there isn't any, then write a note to yourself about why you decided you wanted to make a new class.
  2. My Close Family: This class describes very simply how it interacts with other classes around it, either in the same package or members that would reference it.
  3. Bend Encapsulation: In the comment we mention TableCleaner as an implementation of TableWorker.  Chances are the Table class doesn't have any code reference to TableCleaner, but our comment does.  This can be an "Aha!" moment for a developer.  Eclipse is smart enough to dig around in comments when you're refactoring so it's not as dangerous as you might think.
  4. Use "usually" and "often": Should Table know that it comes from a TableFactory? No.  Should a developer know this? Absolutely.  By saying "usually", we hint to the developer that this is probably the common case, but because of the separation we can't say definitively this will be true.
The last two ingredients are what makes this comment a cut above the rest. It helps guide me up and beyond what most other comments would help me with.

What If I Have To Have Comments?

You might wondering what to do if you have a tool that enforces comments in your system and will fail your CI build if you start getting Ctrl-D happy.  It's pretty simple, disable the rules that force you to write comments.  

At my work place we have rules that all methods must have comments, and comments must end with a period for proper grammar.  Want to know what comment I've seen more times than I'd like to admit?

  * .
    * @return boolean .

Yup.  The problem with enforcing comments is you're enforcing their existence, not their content and simply having a comment isn't ever going to be enough.  The code metric tools don't enforce quality, just quantity.  So ask people around you if it's more important to have lots of comments or if it's important to have better comments.  Maybe for your workplace, quantity is better...
That's It!

I'm still experimenting with other techniques, but so far these have had a great impact in my development. Other tips and ideas are welcome!

Syndicated 2011-09-17 04:25:00 (Updated 2011-09-17 04:25:25) from Idcmp

30 Mar 2011 (updated 8 Apr 2011 at 00:12 UTC) »

Technical Debt

Our build came up recently in a planning session at work. It's a standard big ball of mud, with hidden knowledge all over. It's frail, inconsistent and unhelpful, it's complicated to work with and almost nobody ever gets their local build past "good enough for now" to "working well".

This has been an issue for a while and it hadn't been given the proper attention to be improved. Every change had been reactionary to various needs and it had changed hands so many times that any beliefs or design philosophies it had were long lost.

One developer estimated that wrangling the build system alone accounted for 30% of their development time (that's three days of a two week iteration).

When asked how much effort was required to fix it, the answer was "You can't."

Taking Out Your Technical Loan

While I wasn't originally, I'm now a fan of the term "technical debt". It brings with it a handful of related concepts and terminology that make discussions easier. In this case, compound interest, and bankruptcy.

It all starts when you first make a big investment; probably your first release. Fixing up the last minute bugs before release, cutting corners in the name of getting to market, making "just for now" trade offs going against technical soundness. Each of these things add to your technical debt. There's nothing wrong with this, it's expected.

But then your debt starts adding up pretty quickly:
  • Changes in business needs for the system
  • Changes in company direction
  • Changes in team composition, staff sizing
  • Cutting corners on in-code documentation
  • Industry changes
  • Not keeping up with underlying frameworks
  • Not following proper language techniques
  • Quick security patches
  • Scalability needs
  • Blindly meeting code metrics
  • Over reliance on under-skilled developers
  • Not testing on up to date integration points (databases, operating systems, etc)
  • Quick and dirty bug fixes
  • Minor improvements
Any of these things can put you further into debt, and while you're in debt you'll need to pay compound interest on your technical debt. What was one day of work to fix this iteration can become two days of work a few iterations from now and a week of work next release. Leave it longer and suddenly it's a month of work two years from now.

How does this happen?

Lots of ways.

One of the beautiful things about refactoring is the way it takes into consideration the "context" that a developer has gained in immediately working with the code. Their short-term memory is filled with nuances and intents and allows them to glide smoothly through code. They can envision the refactoring and perform it optimally.

As time passes, they lose some of the context. Surrounding code begins to change, bug fixes are introduced, and other developers build on what was written instead of what was intended. More time passes and other code is refactored, team members come and go or the pattern gets copied elsewhere in your code base.

A few iterations later, there's a hierarchy of dependencies built on this code and what was once a simple refactoring has become a costly code spill cleanup effort.

Eventually the frameworks become out of date and coding styles fall out of style. Instead of wanting to clean up the code, new developers will work around it, introduce a functional duplicate, wrap it or simply make their changes as a series of hacks.

If code quality drops too low, some say morale will follow and keeping more than a handful of experienced developers will become a challenge; attracting developers eager to land their first job, negative velocity developers or those that simply don't care.

This affects your ability to pay off your debt.

Ways To Pay

Every organization has different priorities, goals and principles. As such, calculating how or where to pay for your technical debt varies wildly. Of course, the rule of thumb is "Pay off debt that is costing you the most." There are a handful of ways to do this:
  • Research and Analysis: Work to establish what business functionality should be delivered next then prototype any areas that are known hot spots or developers do not have experience with. With the gained experience determine if the code in question is deeply in debt or if it can afford the new feature.
  • Raise Rates: When asked to estimate a new feature in an area that has high technical debt, focus on estimates which include needed code revitalization. Just as it's the business duty to plan features customers want, it's a developer's responsibility manage risk ensuring it's done technically correct.
  • Foreign Exchange: Exchange the technical currency into salaries as an incentive to keep developers. Many larger, non-technical firms follow this route. It's like buying carbon credits; the debt is still there, but developers are rewarded for tolerating it.
  • Creative Accounting: Buffer estimates and deliverables with needed cleanups. Once someone knows an area of code well, perform small improvements under other ledgers.
  • Get a Second Job: One of the most dire methods is to band together and either work nights or through lunchtime to make the needed improvements.
  • Bankruptcy: Sometimes there's honestly no other choice other than to start over.
Back To The Build

Our build system had gone bankrupt. It had gained such complexity that we could no longer service the interest on the debt.

In our case, this opened the door to switching build tools, cleaning up packaging and performing much needed work on the development environment. It's exciting, as it will not only boost the productivity of each developer, but it hopes to also be something that isn't always dreaded; so developers can focus on solving their problems more effectively and not how to make sure everything builds properly.

And, if the payments are made on it on a regular basis, serve our needs well for years to come.

Syndicated 2011-03-30 04:07:00 (Updated 2011-04-07 23:08:43) from Idcmp

22 Oct 2010 (updated 22 Oct 2010 at 05:16 UTC) »

Who Owns Your Code?

At work, our marketing team is in control of deciding where development spends time on products. This is an effective way to ensure that our product meets the needs of the market we're in.

In fact, I would say we have an effective backlog of "big features" that are desired by our target market. We're only limited by the resources we have on hand to deliver these features. Therein lies the challenge; almost every feature is done on a tight timeline, and once it's in a non-laughable state, it's released and the team goes on to the next big feature. No time is really spent revisiting the overall design of the product, or just bringing its dependencies up to date.

In a previous workplace, the development team had strong say on what was worked on. This was an effective way to ensure the product was relatively nice to work on and its technology up to date. New features were strongly scrutinized and often there was a focus on picking newer technologies that made it easier to develop and service. The challenge was we'd fall behind on bolting on new business features from time to time.

In yet another workplace, our SEO team had the strongest say in what happened. Our main products were publicly accessible websites, but I feel like this was a pretty unique situation. Many technical decisions had to be discussed with the SEO team (which CMS should be chosen, which captcha system should be employed, etc..) and everything from character set encodings, performance trade offs and cache expiry times needed to have their approval. Our challenge there was that the success of some SEO practices are not easily measured, it was difficult to assign a ROI on particular decisions.

Who owns your product? How does that shape it?

Syndicated 2010-10-22 03:05:00 (Updated 2010-10-22 04:45:46) from Idcmp

Negative Velocity Developers

I've worked on a handful of projects over my career where there's been a developer that I've started to coin as "negative velocity".

Their positive impact on projects is best when they're on vacation or spinning their wheels in meetings. Everything they touch could instantly earn an @Deprecated annotation, and often when they're focused on their next tasks, the rest of the team is left to either throw out and rewrite, duplicate in parallel or at best refactor the work they've done.

Some of the best code they write is copy and pasted from other code, some of the worst is of their own design. Often the team works hard to try to minimize the impact of the developer, but they simply just don't understand what they're doing.

Agile projects make the results of this developer even more vicious as they get to choose what area of the project they will molest next. Also, many teams are "agile but" where the team follows some practices, they are not empowered to remove that developer from the team.

Often those that make employment changing decisions don't have the tools to validate such a claim. So what's one to do with a negative velocity developer? How does one capture enough information to prove to someone non-technical that their skill sets would best be used elsewhere?

Note: This is not a current situation for me.

Syndicated 2010-10-13 03:24:00 (Updated 2010-10-13 03:58:44) from Idcmp

11 Mar 2010 (updated 27 Sep 2010 at 02:08 UTC) »

What Your Hiring Process Says About You

What's your hiring experience like? How many "hoops" do you make candidates go through? Why do you make them go through them? In this post I'll recount some hiring processes I experienced and chat a bit about what (as a candidate) they said about the company. At the end I have a potential checklist.

1. Longest: Archiving Company

As a referral, I was spared an initial phone screen and instead was brought in person to meet an operations manager. His questions were non-technical and focused along the "How well do you deal with conflict? How well do you deal with challenging people to work with? Have you been in an environment where people were difficult to get along with?". We ran over time and I was asked to come back to talk to a project manager.

I returned a few days later and the interviewer was reading off situational HR questions, all with a tilt toward conflict resolution.

A few days later, I was asked to complete an assignment - write a service with certain features, complete with documentation and tests. Unfortunately I received the assignment on a Friday and was told it had to be completed before Monday morning. This was a surprise and a bit of a disappointment as it conflicted with birthday plans I had that weekend.

A few days later I was brought in for a third interview with a developer, project manager and product manager. Very few questions were asked about my assignment and the developer asked me some technical questions (some were unrelated to the problem domain they were in). One was my own question that my previous co-worker had brought with him to the company! Further general questions about process followed from their project manager and product manager.

As the interview was closing up, I discovered they'd like me to write two tests: a number matching test and an IQ test. Both timed, both while a loud lunch party was happening through the adjacent wall. The number matching was a doubled-sided, double-columned list. Each entry had a hand written number and a printed number; I was to mark an X on the ones that differed. The IQ test was pretty standard with tricky logic, English and math questions.

Two days later I received a call from their receptionist saying they were no longer interested. Naturally I contacted my reference to find out more. He responded that as far as he knew, they were still discussing it. He confirmed this later, it was a mistake on their part.

The next day he contacted me with their decision; they were no longer interested. Infact, he said that it was a mistake to even begin the interview process with me as they weren't looking for me.

(Had they been interested, I would have been asked back for an additional interview with the CEO.)


Needless to say I was disappointed in this process and if it wasn't for the initial reference, I would have given up on this path much sooner.

Explain the workflow to the candidate. Before I started the process I was told it was similar to a previous company I worked at. It was most definitely not. Not knowing the steps in the hiring workflow, a candidate has no idea that he's about to invest a dozen hours.

Screen for culture. Every organization has a different "culture", and it's important to double check that a person will fit in with the existing employees (or if they'll shake things up in a good way!)

Your questions will reflect what a candidate thinks is important to you. When three separate employees ask questions about navigating difficult people, constantly changing requirements and micromanagement, this is what your candidate will think your place is like. If you ask questions about networking protocols or multi-threaded programming, then your candidate will feel the position will involve both. When I asked "Do you use the technology you're asking me about?", I was surprised their answer was "Not really.".

Sell the company to the candidate. I was walked around the development area on two occasions and got the feel of the environment. I was told about some of the unique perks of the company too. This kept me interested.

Involve only the right people. Out of the five people who interviewed me, one was for technical purposes and the other I would potentially be reporting to. The other three were brought in "just to meet me" and "had no real serious questions to ask". As a candidate, this tells me your decision making process requires people who may be uninvolved with a decision to approve.

Limit an interview time. After about 90 minutes, my ability to continue to answer a barrage of questions begins to diminish. After two hours, I really felt that writing a surprise number-matching and IQ test was quite unfair.

Hiring processes should be fail-fast. As soon as an organization realizes it's not interested, the process should stop. Clearly this one suffered from poor internal communication and lack of direction. Consuming not only my time, but employee time too.

The "assignment" was an interesting project, but given the investment I made and how little it was referenced, I was quite disappointed to waste my time on it. I got the feeling the developer hadn't had time to read it, or that this was just an extra step he disagreed with. The length of this process gave me a lot of experience in what not to do. Had I been accepted, refactoring the hiring workflow was going to be a personal side project.

Shortest: Payment Company

Reading up about the company, I figured that I would be a good fit. I emailed a simple cover letter with some specifics of where I'd fit in. Their CTO responded back and we set up an in-person interview.

The interview with the CTO went well, but he was hoping to have me fill a different role than I was looking for. I met after with two of their developers who were prepared to ask me questions relating to the other role and were ill-prepared to ask me Java related questions.

The next day I heard back from the CTO; his team didn't feel I was Java-savvy enough.


Short, and sweet. Within a few days this company came and left my radar.

Know what you're looking for. Before bringing in candidates, clearly define the role you're looking for. If you're not sure (it happens sometimes), then spend time defining what you're not looking for.

Be prepared. Having stock questions to get a conversation going is fine, but if you haven't read the candidate's resume and don't know what to expect, you'll be ill-prepared to ask the right questions to find out their skills, and most likely opt not to hiring them simply because of this.

They did an excellent job explaining the technology, where they were going and what challenges were ahead for them. The developers I chatted with were interesting, but since they had a "systems guy" and not a "Java guy" mindset, they didn't know what to ask.

Accepted: eCommerce Company

Did some research to discover they'd been looking for someone to fill this position for a while, skipped their online application form and found the email address for hiring. I had customized my cover letter to ensure they realized I was looking for a specific role and highlighted how my experience meshes with what I was looking for.

I received a call back from their hiring team and we set up a phone screen. During the phone screen we discussed what I was looking for, salary expectations, and more about what the company does. From there I was told there was an online Java quiz to do.

The quiz was timed and fairly wide reaching.

I heard back a couple days later that they would like to schedule an in-person technical and HR interview. I asked if this was the interview or if there were multiple steps. At the time I was told that this was the interview, so I fit it in the day before I left on a trip.

I met with a developer there who knew his stuff, and he asked me a stock set of questions and asked me to clarify something from the quiz. Apparently I had got one question wrong but they were still interested. After, I met with the internal recruiter and we talked more about the company and where things were. She let me know that there were two more steps: a refactoring exercise and a second interview.

My first interview went well and I received the assignment while on my trip. Once I returned I sent back my answer and a couple days later I was asked in for a second interview. The assignment took probably an hour or two.

This interview I met with their development manager and we discussed my solution, my decisions, alternatives, drawbacks and technology in general. Later I met with their CTO who asked me some higher level questions.

Then I waited. After what seemed unusually long, I was asked to provide references. After I did, it took an additional week to check them; mid-week I was told why. The company was making some internal changes and this role may not be exactly what it initially was. After discussing it further, I was still on board and was asked for a third interview - more of a just a chat - with the person who would signoff on the hiring paperwork.

I was in the next day and chatted with the VP in question for approximately 10 minutes and he was sold; an offer was made later that day.


Internal political changes made this hiring process a lot longer than it should have been, and being accidentally mislead about the hiring process was a bit of a disappointment.

Funnel Requests. A month prior to emailing them directly, I had filled out an online application form on their site and never heard from them. Since I felt I was a strong potential, I skipped that step when I later saw the role was still unfilled. I still wonder where my first application went.. Make sure that all different interfaces candidates can apply through are given equal priority.

Have Discussions. In a previous company, I would bring whatever problem I was currently tackling to the interview and ask the candidate, providing as much background as I could. We'd work through it together and see where we got. Having a refactoring assignment to chat about simulated this and turned the interview from Q&A to more of a free flowing discussion of ideas.


The eCommerce Company with their phone screen and online quiz had a "fail-fast" process, and I met only with relevant people. They mostly knew what they were looking for, but internal change made the hiring more challenging. I only answered a handful of direct "fit" questions. Everyone I chatted with was open about the challenges they were facing but also quick to highlight some of the great things they really liked. I discovered that both the quiz and the assignment came from existing weaknesses in their team and code base.

The Checklist
  • We explain our complete hiring workflow to candidates up front and keep them informed of their progress.
  • We will stop the hiring process as soon as we feel the answer would be "no". Our process is optimized to make this happen as soon as possible.
  • We limit the time an interview will take, but will cut it short if the answer is a definite "yes" or "no".
  • All potential candidates which enter our hiring system are treated equally, regardless of source.
  • We ensure candidates will be a good fit with the rest of the people here, and we feel we can do this mostly by discussing relevant topics with them.
  • Our interviewers always take time to prepare before an interview.
  • Our questions are relevant to the company, technology and role we're looking to fill.
  • We know the specific skills needed to succeed in the role we're looking to fill.
  • Our hiring process includes conversations with candidates similar to the ones that we have internally already.
  • We involve the fewest people necessary, each person adds unique value to the process.
  • We're honest about our challenges, and we mention the great things about our company throughout the hiring process.

Syndicated 2010-03-10 23:55:00 (Updated 2010-09-27 01:16:32) from Idcmp

Winner of the Worst Java API Award Goes To.....

One of my Java interview questions revolves around the best/worst Java APIs a candidate has worked with.  Tiago Fernandez has thought to take this question to the next level and posted a poll.  While he had less than 100 respondents, it meshes pretty closely with my experience, so I would say that the results are pretty accurate.  Check out the winner of the worst Java API.  Now, how long will we have to wait for JSR-310?

Syndicated 2010-03-06 17:46:00 (Updated 2010-03-06 17:46:17) from Idcmp

My Java Developer Interview Questions

Here it is! Many people have asked for this list - it's one I built, borrowed and tweaked over the years. I place a lot of value in "I don't know" over inventing answers as that's what I'd expect a colleague to do.  

It's really important to tailor questions to each candidate.  I'm a strong believer that a smart, experienced developer can pickup new frameworks, APIs, etc, so a lot of these questions are not Java specific.

Know the answers to any of these? :)

Difference Questions

These are really great kinds of questions, candidates can talk approach the answer however they feel comfortable and aren't required to give "definitions" of things.

  1. What's the difference between TCP and UDP? (if they know, follow up asking about UDP vs ICMP)
  2. What's the difference between Bandwidth and Latency?
  3. What's the difference between an Inner Join and an Outer Join?
  4. What's the difference between NoClassDefFoundError  and ClassNotFoundException?
  5. What's the difference between SAX and DOM?
  6. What's the difference between a Thread and Process?
  7. Order from slowest to fastest: register read, disk seek, context switch, read from main memory.
Design Questions

  1. Let's say you're reviewing (or writing) a simple system that requests an email address, a password and comments (in a textarea) then stores those values in a database. Pretending performance isn't an issue, what kinds of things would you ensure in place before it went live?Sometimes candidates would need some assistance on topics (security, usability, database schemas).
  2. Let's say McDonald's has asked you to develop their "N millions served" counter for their main website.  This value comes from a slower system (via HTTP).  Talk a bit about how you would design this.  
  3. How do you traverse a cyclic graph?
Java Specific Questions
  1. What is autoboxing? Had any problems with it?
  2. Every worked with JMS topic/queue, clustered?
  3. How are Servlets and JSPs different?
  4. What does 'final' mean?  Ever worked with a class marked final? (bonus points if they laugh on the second question)
  5. What does 'static' mean?
  6. List and describe different access modifiers.
  7. How would you diagnose a memory leak?
Random Grab-Bag Questions

A bit of systems, object-orienteering, and such.
  1. How do you check error conditions in bash? (If they list shell scripting)
  2. What's the difference between lazy and greedy regular expressions?
  3. What's a context switch?
  4. Ever worked on an "AJAX"y system?  What challenges did you run into? (a little bit dated now I guess!)
  5. What's a deadlock?  How do you prevent deadlocks?
  6. What is Polymorphism?
  7. What are the characteristics of a singleton?
General Opinion/Discussion Questions

  1. What makes a good build tool?  What makes a bad build tool?
  2. What's your favourite/least favourite API/package? Why?
  3. Have you worked on a high-volume system before?  What is "high volume" to you?
What have you been asked before?

Syndicated 2010-02-24 22:08:00 (Updated 2010-02-24 22:08:25) from Idcmp

97 Things Every Programmer Should Know

Short on the heels of the now-lost 97 Things Every Software Architect Should Know comes a similar list for developers.  It covers a wide variety of ideas from ethics and requirements to code formatting and testing.  You can buy it from O'Reilly or check out the 97 things online.

Syndicated 2010-02-22 20:53:00 (Updated 2010-02-22 20:54:58) from Idcmp

27 Jan 2010 (updated 27 Jan 2010 at 23:07 UTC) »

Four Easy and Practical Tips When Visiting Vancouver for the 2010 Winter Olympics

I've lived in Vancouver for a while now, and realize that you (and 2.3 million of your closest friends) may be coming to visit for the Winter Olympics. Here are some dead easy tidbits that will make your stay more enjoyable. You may want to bookmark this post for while you're here.Tip #1: EatingTypical Vancouver food is Japanese food, mainly sushi. There are many good, cheap Japanese/Sushi

Syndicated 2010-01-26 21:10:00 (Updated 2010-01-27 22:34:43) from Idcmp

Xen vs KVM

I wanted to chime in on the Xen vs. KVM discussions, and give you some food for thought.I've been using Xen now for years, having replaced UserModeLinux on my personal server, and it's seen a lot of production use at my current job. That said, KVM is ultimately the right way to go. Constant maintenance of Xen's hypervisor kernel is what causes Linux distributions grief with Xen. Those that keep

Syndicated 2009-04-03 05:35:00 (Updated 2009-04-03 05:42:45) from Idcmp

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