Monthly Archives: July 2004

Boot from Software RAID5

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How to boot from a software RAID5 array?

I just stumbled upon a this post to debian-user

I’ve just had success migrating Debian Sarge to root on LVM on RAID. Here’s an account of what I’ve done. I believe it could be of interest to both the debian-installer people on debian-boot and to the Debian user community on debian-user, hence the cross-posting to both lists; apologies to anyone subscribed to both. I’m not subscribed to either, so any replies please CC me.

Always on the lookout for creative solutions to this issue, I kept reading. The poster suggests using a pair of mirrored (RAID1) /boot partitions on two of the drives in your RAID5 array to boot from and mount everything else from a RAID5. Does this sound like a Good Thing?

It’s All About Graphs

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Stefano Mazzocchi has an interesting entry It’s All About Graphs

Exerpt:

People in all sort of communities realize how important semi-structured data is and how much it will be in the future. These people tend to think that XML will solve the problem for them and once we have a serious XML query language, we’ll be set forever.

Well, wrong. Relations are tables, XML documents are trees, and, guess what, RDF models are graphs. Yep, you got it, RDF can describe both.

A colleague and I have been discussing the various post-relational approaches to structured data. We have a pair of very interesting use cases to work on. I’ll try and post more on this topic eventually.

WordPress CSS Guides

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There is an excellent WordPress CSS Guides site, check it out:

These tutorial pages are an attempt to help explain some more about the CSS that controls your WordPress weblog, and enable you to both see how CSS affects your page, and hopefully remove any worries you have about it.

The Jeff Pulver Blog: So…Who is Reading This Blog?

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Jeff Pulver wants to know more about his readers, so I dropped him a line.

When you have a moment, please feel free to drop me a line and let me know a little about yourself. I’d like to get to know some of the people who read this. Please send your email to: jeff.pulver@gmail.com.

And Jeff, why doesn’t your blog have a domain name?

Maven vs Ant

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Updated: Since I’ve noticed quite a few Google hits on this entry, I thought I’d post some more information.

I’ve finally figured out what Maven is all about. (No one seems to say it outright.) This enlightenment comes after writing a previous post

The basic difference is fundamental: where Ant allows you to build your own targets to do anything you wish, Maven takes your description of your project (directory structure, etc) and uses standard, pre-written, tasks (goals in Maven-speak) to achieve the usual build needs.

Maven has a bunch of built-in plugins and goals. You can write your own using Jelly.

I’ll be updating this post with some more info shortly. (Ok, so I guess it took a while. My conclusion seems to be staying with Ant, particularly with the addition of new extensions.)

Some relatively clean information is available here

JJar

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JJAR promises to be a tool/service that the Java community sorely needs. We are all too familiar with Jar hell.

From the site:

A distributed repository consisting of jars from various projects (which we call packages) as well as version and dependency information about those packages. This logical repository consists of a central main repository, and any number of sub-repositories, each responsible for a given project (or projects.)

A toolset to allow the navigation and fetching from this repository, as well as direct access to repository information, such as project dependencies.

The general idea is that you setup a repository for your jars, including full dependancy information, which then allows you to use the Ant task as noted here

However, I see very little activity on this project. CVS has nothing interesting in over 2 years. Anyone know its status?

I do intend to test it this week, even though it seems inactive. (Probably because of Maven