[Users] Live Migration Optimal execution

[Devon B.]

Suspend/dump shouldn't have anything to do with the disk size of the 
container AFAIK.   That should only be dumping the memory of the 
system.  Have you tested multiple times?  Maybe a process hung during 
the suspend?  It might also be useful for you to track the size of the 
dump file.

> Nipun Arora <mailto:nipunarora2512 at gmail.com>
> Saturday, November 22, 2014 12:09 PM
> Hi All,
>
> I was wondering if anyone can suggest what is the most optimal way to 
> do the following
>
> 1. Can anyone clarify if ploop is the best layout for minimum suspend 
> time during live migration?
>
> 2. I tried migrating a ploop device where I increased the --diskspace 
> to 5G, and found that the suspend time taken by live migration 
> increased to 57 seconds (mainly undump and restore increased)... 
> whereas a 2G diskspace was taking 2-3 seconds suspend time... Is this 
> expected?
>
> 3. I tried running a write intensive workload, and found that beyond 
> 100-150Kbps, the suspend time during live migration rapidly increased? 
> Is this an expected trend?
>
> I am using vzctl 4.7, and ploop 1.11 in centos 6.5
>
> Thanks
> Nipun
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