Chris Danford » Uncategorized

HTML5 boilerplate

chrisdanford — Sun, 12 Jun 2011 05:04:24 +0000

HTML5 Biolerplate (by Paul Irish of Modernizr fame) is a nice skeleton for starting new projects. The pieces I’m most interested in and have copied from are the CSS (reset and baseline), .htaccess (MIME types, cache settings, rewrites for pretty/canonical URLs), HTML skeleton (asynchronous Google Analytics, iOS directives and touch icons, IE conditional classes).

Even if you don’t have an immediate use for these things, it’s worth a peruse to become familiar with some of the more widespread browser compatibility and performance problems, and the popular techniques to solve them.

Browser tab management

chrisdanford — Tue, 15 Mar 2011 07:13:54 +0000

I’m one of those people that uses the browser as a todo list – there are multiple 100s of tabs open across my browsers and several computers. These are extensions and settings that I’ve found invaluable.

Vertical Tabs

for Firefox 4 – Tree Style Tab extension
for Chrome – type “about:flags” into the URL, enable “Side Tabs“, restart, right-click in tab area and choose Side Tabs

Tab Thumbnail View

for FireFox 4: Panorama (built in)
for Chomre: Sugar extension

These aren’t exactly tab-related, but they allow for mostly seamless hopping between browsers and between computers.

Password Sync for both Firefox 4 and Chrome: LastPass extension
Bookmark Sync for both Firefox 4 and Chrome: Xmarks extension

Intel RAID5: pretty much worthless

chrisdanford — Wed, 02 Jun 2010 17:02:51 +0000

I have a co-located server with a 3-disk RAID5 array (Intel ICH8 controller). Things seemed fine when I was setting up the server – pull a disk drive, re-insert, volume rebuilds, everything keeps working.

What I didn’t test though is how degraded the performance is while rebuilding. A disk array that was getting 100MB/s reads during normal operation is now getting < 1MB/s reads while rebuilding, and my database application can’t complete requests at that speed. To add insult to injury, the completely idle server with all disks healthy takes over 100 hours to rebuild a 2TB volume (~5.8MB/s).

Googling reveals dozens of similar horror stories with Intel RAID5 rebuilding. Do yourself a favor and rule out Intel’s RAID5 if you care about usable uptime.

Edit: I’ve changed to a 2-disk software RAID1 and am getting 80MB/s read during rebuilds.