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Re: [Xen-users] live migration breaking...aoe issue?


  • To: lee hartley <leeslist@xxxxxxxxx>
  • From: Marcelo Messa <mrmessa@xxxxxxxxx>
  • Date: Tue, 15 Jan 2008 22:49:12 -0200
  • Cc: xen-users@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Tue, 15 Jan 2008 16:50:01 -0800
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"aoe-stat" command will show the state of your disks.

AoE have a 300 seconds for default timeout. Try set aoe_deadsecs to 30 seconds (or less if is your intention).

You can set aoe_deadsecs from command line (echo in /sys), with sysctl or with a parameter to module (you can put in /etc/ modprobe.conf "alias aoe aoe_deadsecs=30".

Cheers
    Marcelo Messa

Em 15/01/2008, às 18:57, lee hartley escreveu:

I am trying to get a proof-of-concept type setup going...I have a
storage box and 2 xen servers...I am using file based disk that live
on the aoe device...i can run the vm from either host without
issue...when I run the live migration, the domain leaves the xm list
on host 1 and shows up on host 2 (however there is a pause for pings
of about 2 minutes?)...after it is on host 2, I can xm console and
connect to it, I checked the uptime and it was inline with what I
expected, but if I ssh into it or run "last" it hangs...can still be
pinged, but the console just hangs indefinitely...

another observation - when I go to the directory on host 1 and create
a file, I do not see it show up on host 2 unless I remount it...which
is why I have been thinking there is a syncing, caching
issue...thinking that maybe the host moves over and the disk it
accesses is not "fresh"...

I have not worked with aoe or xen before so, I am hoping there is just
a config stage I missed...

any thoughts/suggestions would be great!

thanks
lee

--
Everything should be made as simple as possible, but not simpler. --
Albert Einstein

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