VIRTUAL MACHINE REPLICATION AND MIGRATION

Virtual machine replication and migration are provided. Examples herein relate to checkpoint replication and copying of updated checkpoint data. For example, a memory controller coupled to a memory can receive a write request with an associated address to write or update checkpoint data and track updates to checkpoint data based on at least two levels of memory region sizes. A first level is associated with a larger memory region size than a memory region size associated with the second level. In some examples, the first level is a cache-line memory region size and the second level is a page memory region size. Updates to the checkpoint data can be tracked at the second level unless an update was previously tracked at the first level. Reduced amounts of updated checkpoint data can be transmitted during a checkpoint replication by using multiple region size trackers. 虚拟机复制和迁移。本文中的示例涉及检查点复制和更新的检查点数据的复制。例如，耦合到存储器的存储器控制器可以接收具有相关联地址的写请求，以写入或更新检查点数据并基于至少两个级别的存储器区域大小来跟踪对检查点数据的更新。第一级别与比与第二级别相关联的存储器区域大小更大的存储器区域大小相关联。在