At Facebook, cache is king. Here’s how it keeps it up.

Facebook had a problem ensuring that its tens of thousands of caching servers were performing at their peak. If they bogged down, so did that site. So Facebook created Claspin, a heat map of the health of its caches that builds on its institutional knowledge.

Once Again, See How Twitter Scales

A day after Twitter experienced its “CNN moment,” John Adams , the messaging service’s operations engineer, posted a nice slide show on how the company has scaled and the tools it uses. Entitled, “Talk Cloudy to Me” the slide show reviews old insights and offers new ones.

NorthScale Caches $10M in VC Funds, Gets New CEO

NorthScale, a Memcached-focused start-up based in Mountain View, Calif. says it has raised $10 million in Series B funding from Mayfield Fund. Previous investors Accel Partners and North Bridge Venture Partners also invested. NorthScale has also hired a new president & CEO – Bob Wiederhold.