On Mon, Jun 11, 2012 at 10:04 PM, Magnus Hagander <magnus@hagander.net> wrote:
> On Sun, Jun 10, 2012 at 4:02 PM, Fujii Masao <masao.fujii@gmail.com> wrote:
>> On Sun, Jun 10, 2012 at 7:55 PM, Magnus Hagander <magnus@hagander.net> wrote:
>>> How about this?
>>
>> + /*
>> + * Set flushed position to the last byte in the previous
>> + * file. Per above we know that xrecoff%XLOG_SEG_SIZE=0
>> + */
>> + flushedpos = blockpos;
>> + if (flushedpos.xrecoff == 0)
>> + {
>> + flushedpos.xlogid--;
>> + flushedpos.xrecoff = XLogFileSize-1;
>> + }
>> + else
>> + flushedpos.xrecoff--;
>>
>> flushedpos.xrecoff doesn't need to be decremented by one.
>> If xrecoff % XLOG_SEG_SIZE = 0, the position should be the last
>> byte of previous (i.e., flushed) WAL file.
>
> Hmm. I thikn I confused myself with "last byte written" vs "current
> position". And we're dealing with current position here...
>
> So it should just be flushedpos = blockpos and be done with it, right?
Yep.
> Though before I commit anything with this, we need to decide what to
> wrt syncrep on that, per the other thread.
Yep.
Regards,
--
Fujii Masao