BSDCan2007 - Confirmed Schedule
BSDCan 2007
The Technical BSD Conference
| Speakers | |
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Marko Zec |
| Schedule | |
|---|---|
| Day | 3 |
| Room | SITE A0150 |
| Start time | 15:00 |
| Duration | 01:00 |
| Info | |
| ID | 24 |
| Event type | Lecture |
| Track | Networking |
| Language | English |
| Feedback | |
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Network stack virtualization for FreeBSD 7.0
How many machines do you want?
Due to better scalability and significantly lower performance cost than full hardware virtualization platforms, operating system level virtualization frameworks such as BSD jails often become platforms of choice among production hosting environments. Network stack virtualization allows complete networking independence between jails on a FreeBSD system, including providing each jail with its own virtual network interface set, routing tables, firewall, rate limiting, IPSEC configuration and more. This paper describes the design and implementation of a network stack virtualization framework for FreeBSD -CURRENT.
The original implementation of the virtualized network stack for FreeBSD first appeared and was maintained as a patchset against the 4.x versions of the OS kernel. In this paper I'll describe the design issues, choices and experiences from the from-scratch reimplementation of the network stack virtualization for FreeBSD 7.0-CURRENT. The major questions the paper will address are as follows:
- what are the major changes to the internal kernel API-s that the virtualization framework introduces;
- what methodology can be applied for virtualizing the existing kernel code / subsystems - which parts can be done mechanically and which can be expected to be more tricky;
- what are the performance implications of the stack virtualization: benchmarking against the unmodified OS;