I can't get into the portal... can anyone help?
wonder why I was booted...
up_the_irons: can you help me get back into the portal?
tmarble: just sent you a response to your ticket
tmarble: in fact, you should have a password reset email in your Inbox
I generated one just now
yep, trying it
yea, i'm in!
up_the_irons: thx! (wondering how you can do the live VM migrations??)
live migrations mean copying memory contents over network
so basically it just looks at the state of your vm, and recreates that on another host
the storage itself can be accessed from multiple locations so doesn't need to be replicated
that's crazy! is it with lxc, virtbox, xen or something else?
kvm/qemu
nice!
backend is ceph
i.e. you kind run "swap" to ceph and let it do the "network distribution" for you?
.. but page out everything
ceph stores the whole block device
and distributes it across multiple servers
oh.. the disk sure
so you can lose one server and keep going etc
how about memory?
but it also means that you can join the network between two locations
and access the same storage from another location
and storage can be moved from one location to another with no down time too
memory it basically justs read in all of the memory and sends it to the other host
so literally there's only a couple of seconds (to risk of transactions in flight) to pivot the "master"?
that can take a few seconds, so after it's done that it copies any new changes
is that something qemu supports out-of-the-box?
well it's like swap, it'll trap  all new memory accesses
so it knows to send them
umm sort of
it's out of the box.. but ceph, etc is reasonably complicated to setup
understood
you need at least 3 or 4 storage hosts to run ceph storage
but it scales out nicely
it's the free/open source equiv of S3 :)
but it means that very small setups aren't really used with it
ceph has a few things, an object store like s3 is one of them
it also has rbd which we're using, and a file system
rbd is basically optimised for block device storage
and supports useful things that cater to that like resizing the block device
cool!
Whats the network capacity / link between the 2 cages? And is it routed via the Meet Me Room, or direct cage to cage?