On Wed, May 2, 2012 at 6:06 PM, Noah Misch <n...@leadboat.com> wrote: > Can we indeed assume that all support-worthy filesystems align the start of > every file to a physical sector? I know little about modern filesystem > design, but these references leave me wary of that assumption: > > http://www.mail-archive.com/linux-btrfs@vger.kernel.org/msg14690.html > http://en.wikipedia.org/wiki/Block_suballocation > > If it is a safe assumption, we could exploit it elsewhere.
Not to say whether this is safe or not, but it *is* exploited elsewhere, as I understand it: the pg_control information, whose justification for its safety is its small size. That may point to a very rare problem with pg_control rather the safety of the assumption it makes. -- fdr -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
