Probably it is very incomplete. I copied over much of the content from 0.7
that is still applicable, but I added the following:
1. A section on data centers and mirroring
2. Removed the cut-and-pasted scala code in the monitoring section and just
gave a high-level description of what we monitor
3. Added a lot of details about what we have learned about Linux, ext3,
write latency, etc.
Let me know any thoughts on how to improve this.