On 07/03/2014 11:42 AM, Hongyang Yang wrote:
I wonder if there is anyway to coordinate this between COLO, Michael
Hines microcheckpointing and the two separate reverse-execution
projects that also need to do some similar things.
Are there any standard APIs for the heartbeet thing we can already
Hi Michael,
Thank you for paying attention on this.
On 07/08/2014 02:06 PM, Michael R. Hines wrote:
On 07/03/2014 11:42 AM, Hongyang Yang wrote:
I wonder if there is anyway to coordinate this between COLO, Michael
Hines microcheckpointing and the two separate reverse-execution
projects tha
> > Thanks Dave:
> > Whether the randomness value/branch/code path the PVM and SVM
> may
> > have, It is only a performance issue. COLO never assumes the PVM and
> > SVM has same internal Machine state. From correctness p.o.v, as if
> > the PVM and SVM generate Identical response, we can view
> >
> > Let me clarify on this issue. COLO didn't ignore the TCP sequence
> > number, but uses a new implementation to make the sequence number to
> > be best effort identical between the primary VM (PVM) and secondary VM
> > (SVM). Likely, VMM has to synchronize the emulation of randomization
> >
> >
> > I didn't quite understand a couple of things though, perhaps you can
> > explain:
> >1) If we ignore the TCP sequence number problem, in an SMP machine
> > don't we get other randomnesses - e.g. which core completes something
> > first, or who wins a lock contention, so the output strea
* Dong, Eddie (eddie.d...@intel.com) wrote:
> > >
> > > Let me clarify on this issue. COLO didn't ignore the TCP sequence
> > > number, but uses a new implementation to make the sequence number to
> > > be best effort identical between the primary VM (PVM) and secondary VM
> > > (SVM). Likely, VMM
Am 01.07.2014 14:12, schrieb Dr. David Alan Gilbert:
> Are there any standard APIs for the heartbeet thing we can already
> tie into?
Maybe the http://www.linux-ha.org/wiki/Heartbeat daemon?
Andreas
--
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany
GF: Jeff Hawn, Jennifer Guil
* Dong, Eddie (eddie.d...@intel.com) wrote:
> > >
> > > I didn't quite understand a couple of things though, perhaps you can
> > > explain:
> > >1) If we ignore the TCP sequence number problem, in an SMP machine
> > > don't we get other randomnesses - e.g. which core completes something
> > > f
Hi David,
On 07/01/2014 08:12 PM, Dr. David Alan Gilbert wrote:
* Hongyang Yang (yan...@cn.fujitsu.com) wrote:
Hi Yang,
Background:
COLO HA project is a high availability solution. Both primary
VM (PVM) and secondary VM (SVM) run in parallel. They receive the
same request from client, and
* Hongyang Yang (yan...@cn.fujitsu.com) wrote:
Hi Yang,
> Background:
> COLO HA project is a high availability solution. Both primary
> VM (PVM) and secondary VM (SVM) run in parallel. They receive the
> same request from client, and generate response in parallel too.
> If the response packets
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