[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] uClibc

Kip Macy wrote:

At the risk of starting the construction of a bikeshed, what kind of
hardware are you running on? The reason for the increased appeal of
virtual machines over the past few years is that hw performance and
memory availability has increased faster than applications' needs.

I am running on 2.4GHz Dell Optiplexes with 512MB of memory and no swap configured for dom0. Currently I have 16 of them, but in the long run I am hoping to run this on 1000+ nodes with similar config. That means any memory I waste I can multiply with an arbitrarily large number to make it sound scary.

My approach has (to me) many other nice properties, apart from the memory footprint, some of the more important ones being security (much reduced trusted computing base) and performance+isolation (not using shadow page tables, not relying on an external checkpointing service in dom0, being able to delay scheduling badly behaving processes during migration, knowing who is in my ARP cache, etc.), as well as overall better alignment with Saltzer's end-to-end argument.

I would like to create a platform where anyone can purchase resources, without any kind of trust that customer are playing nice, and I think that I am on the right path.

Before Xen came along, I created a similar platform (called NomadBIOS), based on L4, sporting what I now call hosted or managed migration. The system I am building now is my 'second system', for better or worse ;-) I probably spent more time thinking about these issues than most people (though that is no guarantee that my conclusions are correct).

> -Kip


SF email is sponsored by - The IT Product Guide
Read honest & candid reviews on hundreds of IT Products from real users.
Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/
Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.