I moved 54 sites of mine to a Linode 720 + a Linode 360 (For the DB) both running Ubuntu 8.10 32 bit and cannot say enough! Keep up the great work guys!
Just this morning, I launched a new, pretty high profile website and it has already received many thousands of unique visitors and 100's of thousands of requests and the server is humming along like nothing ever happened. Most of the 54 sites are Wordpress 2.7.x or another CMS.
The load is low and memory use is WELL within the capacity of my nodes.
Code:
Tasks: 31, 1 running
Load Average: 0.05 0.03 0.00
Uptime: 7 days, 21:21:21
total used free shared buffers cached
Mem: 720 579 140 0 53 320
-/+ buffers/cache: 206 514
Swap: 511 6 505
This is with 30-40 concurrent users at this moment JUST on the new site, not counting any of the other blogs/CMSes.
Total estimates are 15-20,000 unique visitors a day to all the sites and 400-500,000 requests.
I have offsite rsync backups running nightly and occasional random offsite (S3) backups running. Speed to the Internet is superior compared to the provider I moved from both externally and on the private internal network. External speeds are especially helpful when backing up 1gb+ at a time to S3.