stefano@angmar.sublink.ORG (Stefano Longano) (03/09/91)
Archive-name: library/usenix/sprite-lfs/1991-03-06 Archive: sprite.berkeley.edu:/lfsUsenix90.ps [128.32.150.27] Original-posting-by: stefano@angmar.sublink.ORG (Stefano Longano) Original-subject: Re: Why is restore so slow? Reposted-by: emv@ox.com (Edward Vielmetti) In <480@appserv.Eng.Sun.COM> lm@slovax.Berkeley.EDU (Larry McVoy) 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, >something that occurs quite often in restore :-), is synchronous. It has to >be, those are the semantics of a Unix file system (can you say lock files?). These operation need not to be syncronous to retain the semantics of the Unix file system. You could read the paper presented at the Summer '90 USENIX Technical Conference by Mendel Rosenblum and John Ousterhout about the Sprite Log-structured File System. This paper is available for anonymous FTP from sprite.berkeley.edu. -- Stefano Longano WW WW EMAIL : stefano@angmar.sublink.ORG Viale Trento 1 ||wwwwwwwwwww|| Happy are those who dream dreams 38068 Rovereto (TN) || --- || and are ready to pay the price Tel : +39 (464) 436042 ||____|_|____|| to make them come true