something about vm migration

VM migration

一、 What should be migrated

      1）cpu state

     2）network state

      3）memory state

      4）disk state

 

二、Existing technologies

      1）pre-copy

      2）post-copy

      3）memory de-duplication (merge the same page)

      4）memory compression

      5）parallelization migration (multi-threads)

      6）just translate the state of the disk

      7）trace and replay

     

三、Trend

      1）one → many

      2）gang migration

      3） parallelization

      4） heterogeneous storage environment

 

四、methods used in live storage migration

1)     dirty block track (DBT)

2)     I/O mirroring

 

五、live migration tools

1)     VMWare  Vmotion

2)     Xen              XenMotion(pre-copy)

3)     KVM             libvirt&virtmanager(pre-copy)

4)     hyperv          hyper-v(pre-copy)

 

六、migration performance

1)     total migration time

2)     down time

3)     impact on other application running on thesource host