| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce a number of times of synchronization of an execution state of a virtual machine and a storage, while avoiding loss of data written to the storage of an active system. <P>SOLUTION: At the timing of writing to a storage of an active system, it is determined that whether a storage writing instruction is writing to a memory page (a dirty page) which is changed after the last synchronization or to the same place of the storage. When it is writing to the dirty page or to the same place of the storage, an execution state of a virtual machine of the active system and storage data in the storage of the active system are transmitted to a standby system. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
