[blackbirdpie url=”https://twitter.com/vpsnet/status/116838472219770880″]
Today at around 06:30 EDT, VPS.NET engineers did a test failure at their recently launched Japan cloud and it went really well!
No downtime, no data loss, nothing. Exactly as it should work. Kudos to the VPS.NET team! I really hope that they have found the perfect solution for their SANs and that they will begin rolling-out the new technology to their other SANs soon.
Below is the output of sar, about an hour and a half after the test. The lines that indicate that something was going on (i.e. the test failure) are highlighted.
root@dev:~# sar
Linux 2.6.32-5-xen-amd64 (dev) 09/22/2011 _x86_64_ (3 CPU)
[...]
04:35:01 AM CPU %user %nice %system %iowait %steal %idle
04:45:01 AM all 0.00 0.00 0.00 0.00 0.00 100.00
04:55:01 AM all 0.00 0.00 0.00 0.00 0.00 100.00
05:05:01 AM all 0.00 0.00 0.00 0.00 0.00 100.00
05:15:01 AM all 0.00 0.00 0.00 0.00 0.00 100.00
05:25:01 AM all 0.00 0.00 0.00 0.00 0.00 100.00
05:35:01 AM all 0.00 0.00 0.00 0.00 0.00 100.00
05:45:01 AM all 0.00 0.00 0.00 0.00 0.00 100.00
05:55:01 AM all 0.00 0.00 0.00 0.00 0.00 100.00
06:05:01 AM all 0.00 0.00 0.00 0.00 0.00 100.00
06:15:01 AM all 0.00 0.00 0.00 0.00 0.00 100.00
06:25:01 AM all 0.00 0.00 0.00 0.00 0.00 100.00
06:35:01 AM all 0.02 0.00 0.02 0.01 0.00 99.95
06:45:01 AM all 0.07 0.00 0.04 0.24 0.00 99.66
06:55:01 AM all 0.07 0.00 0.03 6.35 0.00 93.55
07:05:01 AM all 0.00 0.00 0.00 0.00 0.00 100.00
07:15:01 AM all 0.00 0.00 0.00 0.00 0.00 100.00
07:25:01 AM all 0.00 0.00 0.00 0.00 0.00 100.00
07:35:01 AM all 0.00 0.00 0.00 0.00 0.00 100.00
07:45:01 AM all 0.00 0.00 0.00 0.00 0.00 100.00
07:55:01 AM all 0.00 0.00 0.00 0.00 0.00 100.00
08:05:01 AM all 0.00 0.00 0.00 0.00 0.00 100.00
08:15:01 AM all 0.00 0.00 0.00 0.00 0.00 100.00
Average: all 0.00 0.00 0.00 0.13 0.00 99.86
root@dev:~# uptime
08:16:20 up 8 days, 4:35, 1 user, load average: 0.00, 0.00, 0.00