> == Image Formats == > > Image formats are not safe to use with live migration. The reason is that > QEMU caches data for image formats and does not have a mechanism to flush > those caches. The following attempts to describe the issues with the > various formats > > === QCOW2 === > > QCOW2 caches two forms of data, cluster metadata (L1/L2 data, refcount > table, etc) and mutable header information (file size, snapshot entries, > etc). > > This data needs to be discarded before after migration starts.
before after? pick one =) -- Ryan Harper Software Engineer; Linux Technology Center IBM Corp., Austin, Tx ry...@us.ibm.com
