> One point that I no longer recall the reasoning behind is that xlog.c > doesn't think O_SYNC is a preferable default over fsync. We'd certainly > want to hack xlog.c to change its mind about that, at least on Windows; > assuming that the FILE_FLAG way is indeed faster. I also confirmed that the totally un-cached mode in windows (FILE_FLAG_WRITE_THROUGH | FILE_FLAG_NO_BUFFERING) will only work if the amount of data written is some multiple of 512 bytes. Can WAL work under this restriction?
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