On Fri, Sep 9, 2011 at 7:46 PM, Florian Pflug <f...@phlo.org> wrote: >> I am going to use the whole partition device for the DB (like /dev/sda1) >> , so no filesystem code will be used. Also I am using asynchronous IO >> (the aio_read and aio_write) and I don't know if they can be combined >> with the fdatasync() syscall? > > Someone else (maybe the POSIX spec?) must answer that as I know very little > about asynchronous IO. >
There's an aio_fsync as part of the aio api, But you could use fsync or fdatasync -- I assume you would have to wait for the aio_write to have finished before you issue the fsync. But if you're going to fdatasync all your writes right away you may as well open with O_DSYNC which is, I gather, exactly how aio is intended to be used. -- greg -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
