Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!uunet!hsi!stpstn!lerman From: lerman@stpstn.UUCP (Ken Lerman) Newsgroups: comp.unix.wizards Subject: Re: Why is restore so slow? Message-ID: <6511@stpstn.UUCP> Date: 5 Mar 91 14:27:16 GMT References: <50235@olivea.atc.olivetti.com> <1013@eplunix.UUCP> <480@appserv.Eng.Sun.COM> Reply-To: lerman@stpstn.UUCP (Ken Lerman) Organization: The Stepstone Corporation, Sandy Hook, CT 06482 Lines: 19 In article <480@appserv.Eng.Sun.COM> lm@Eng.Sun.COM writes: > >I believe that a key component to the slowness of restore is the synchronous >nature of directory operations in the Unix file system. For example, a create, ... >--- >Larry McVoy, Sun Microsystems (415) 336-7627 ...!sun!lm or lm@sun.com I was always taught that there is no point in debating how many angels can dance on the head of the pin when one can just go count them. :-) Has anyone out there with the appropriate source done some measurement of where the time goes in restore? How many reads/writes does it do? How long does each take? Do those figures seem reasonable? ...etc... Just a humble suggestion from someone who neither has the problem nor the solution. :-) Ken