Date: Thu, 8 Apr 1999 15:28:40 +1000 From: Peter Jeremy <peter.jeremy@auss2.alcatel.com.au> To: hackers@FreeBSD.ORG Subject: Re: Volume managers Message-ID: <99Apr8.151534est.40342@border.alcanet.com.au>
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Whilst we're all making up wishlists for things we'd like to see (someone else implement): The `clone filesystem' command supported by Digital UNIX ADVfs is _very_ nice for `point-in-time' backups. (Basically clonefset makes a read-only snapshot of the filesystem - changes to the `active' filesystem are done using copy-on-write). Unfortunately, I suspect it couldn't be implemented within UFS (because UFS relies on blocks being at particular physical locations within a CG - ie superblock, array of inode blocks, data blocks - which would make creating the copy-on-write blocks difficult). Peter To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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