A Method for Online Migration of Virtual Machines across Virtualized Data Centers
A data center and virtual machine technology, applied in the field of resource management of virtualized data centers, can solve the problems of long migration time and downtime of virtual machines, incomplete recovery, large data volume, etc., and achieve good use value and market prospects , improve migration time and downtime, and reduce migration overhead
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[0041] figure 1 It is a flow chart of the method for online migration of virtual machines across virtualized data centers according to the present invention. Such as figure 1 As shown, the method includes:
[0042] Step 1, deploy multiple virtualized data centers on the wide area network, wherein the service nodes of each virtualized data center run virtual machines, and the storage nodes of each virtualized data center store virtual machine images;
[0043] Step 2, connect multiple virtualized data centers through a virtual private network VPN of a two-layer bridge mode (tap);
[0044] Step 3, in the virtual machine I / O driver process on the source node, monitor the dirty block (Block) that the migrated virtual machine writes to the disk each time, and create a migration thread (S_thread) for the virtual machine I / O driver process ), the migration thread performs pre-migration of user private data files and migration of dirty block monitoring records, wherein the dirty blo...
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