检查点队列上的最早脏的数据块再次被修改以何种顺序刷到磁盘

Alex螺丝钉

这个图是关于buffer header的，可以清楚的看出其上是记录着rba信息的。

Yong Huang

If your point is to prove that RBA is recorded in the buffer header, you can just dump the datafile header. But the question we had earlier was not about *buffer header*. We were asking whether *the checkpoint queue* recorded RBAs. You can say the checkpoint queue is a linked list of buffer headers. But you can't say each entry on the list (i.e. in the queue) contains all info in the buffer header.

Alex螺丝钉

>But you can't say each entry on the list (i.e. in the queue) contains all info in the buffer header.

Yeah, you're right.

boboo2015

十分感谢楼主和Alex螺丝钉 ，二位老师在繁忙工作之余，给小弟指点，衷心感谢！
>Can you give a reference on this, or from your own test?
因为初学知识浅薄 ，操作上生疏，实验场景自己做了几个总觉得不对，没敢发。
再次感谢，Alex螺丝钉老师提供的实验场景，正是我想求证的问题。

请各位老师指点，感谢大家！

Alex螺丝钉

~~不敢当