Upgrading Linode II: Xen to KVM

It's been a while since my last Linode upgrade (about five months judging by the uptime-o-meter).

uptime

This upgrade took about fifteen minutes and from what I can tell resulted in no side effects.

While the last upgrade came with about 60% increase in throughput, this upgrade was closer to 16%. Take it with a grain of salt though; my previous benchmarks were run while using the amazing Webpass ISP whereas these results were done using the ever shitty Comcast connection.

Pre-Upgrade Benchmark (Xen)

$ siege -c 20 -r 100 https://thomashunter.name
** SIEGE 3.1.0
** Preparing 20 concurrent users for battle.
The server is now under siege...

Transactions: 2000 hits
Availability: 100.00 %
Elapsed time: 265.33 secs
Data transferred: 55.56 MB
Response time: 2.12 secs
Transaction rate: 7.54 trans/sec <--
Throughput: 0.21 MB/sec
Concurrency: 15.96
Successful transactions: 2000
Failed transactions: 0
Longest transaction: 3.02
Shortest transaction: 0.66

Post-Upgrade Benchmark (KVM)

$ siege -c 20 -r 100 https://thomashunter.name
** SIEGE 3.1.0
** Preparing 20 concurrent users for battle.
The server is now under siege...

Transactions: 2000 hits
Availability: 100.00 %
Elapsed time: 227.75 secs
Data transferred: 55.56 MB
Response time: 1.73 secs
Transaction rate: 8.78 trans/sec <--
Throughput: 0.24 MB/sec
Concurrency: 15.15
Successful transactions: 2000
Failed transactions: 0
Longest transaction: 2.83
Shortest transaction: 0.63
Thomas Hunter II Avatar

Thomas is the author of Advanced Microservices and is a prolific public speaker with a passion for reducing complex problems into simple language and diagrams. His career includes working at Fortune 50's in the Midwest, co-founding a successful startup, and everything in between.