Fwd: Abyssmal dump cache efficiency

[Boris Samorodov]

On Fri, 23 Feb 2007 10:56:17 +0700 Eugene Grosbein wrote:
> On Thu, Feb 22, 2007 at 12:37:00PM -0500, Zaphod Beeblebrox wrote:
> > >Peter Jeremy wrote:
> > >> I've found that you do get a worthwhile improvement in dump|restore
> > >> performance by introducing a large (10's of MB) fifo between them.
> > >> This helps reduce synchronisation between dump and restore (so that
> > >> dump can continue to read whilst restore is busy writing a batch of
> > >> small files and vice versa).  There's a suitable port but I can't
> > >> recall the name because I wrote my own.
> > >
> > >There are several.  The most popular ones are probably
> > >misc/team and misc/buffer.
> > 
> > I can certainly vouch for that , too.  I generally use "team 1m 32" (total
> > of 32meg of buffer).  Team seems to not want to buffer more than 1m per
> > process and I think 32 is the max # of processes.

> Someone, please take a look at trivial patch for team's buffer size here:
> http://www.freebsd.org/cgi/query-pr.cgi?pr=ports/106806

> The maintainer timeout for the PR has occured long time ago.

Committed, thanks for both your patches and patience. ;-)


WBR
-- 
Boris Samorodov (bsam)
Research Engineer, http://www.ipt.ru Telephone & Internet SP
FreeBSD committer, http://www.FreeBSD.org The Power To Serve