Hi Laurynas, On Wed, May 6, 2015 at 9:14 PM, Laurynas Biveinis < laurynas.bivei...@gmail.com> wrote:
> Xiaofei - > > > Does InnoDB maintain a dirty > > page table? > > You must be referring to the buffer pool flush_list. > You are right. The flush_list is can be used for recovery and checkpoint. > > > Is fsync called to guarantee the page to be on persistent > > storage so that the dirty page table can be updated? If this is the case, > > when is the dirty page table updated for asynchronous IOs? > > Check buf_flush_write_complete in buf0flu.cc. For async IO it is > called from buf_page_io_complete in buf0buf.cc. > You are right that this is the place it updates the dirty page information. But I still don't understand why the fsync is needed for synchronous IOs, but not for the AIOs. Jan Lindstrom said fsync is also called for other AIO operations. But I could only it true in one of many AIO operations. Or maybe I am missing something still? > > -- > Laurynas >
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