When I read the docs, squasfs is read only, and you need at least the uncompressed space to create the image ... not useful here.
BillK On Fri, 2006-05-12 at 05:17 -0400, ted leslie wrote: > > since you are not looking at writing to this fs, > then you can use cloop or squashfs > > for example, gentoo uses squashfs for its live cd/dvd > > squashfs is considered better, but both are in use on live cd/dvd, > cloop was (At least partially) written by the knoppix dude. > > typically you get 2.5:1 compression with these over a general linux distro > file average. > > either one will put all files starting at a root path into the compressed > structure. > The only real difference between doing it cloop/squashfs and tar.*z > is that cloop/squashfs can be directly accessed (once mounted), > which might be of some use. > > big negative (unless fixed in recent releases) is you need enough ram/VM to > hold the entire > fs (to be compressed) in memory. So if you have 512MB ram and a 1GB VM > allocation, > the biggest fs you can archive using cloop/squashfs would be 2.5GB (approx), > that compresses down to > the 1GB to fit into your VM. > > pretty recent cloop souce is at knoppix web site, > squashfs, IIRC is at kernel.org > squashfs would also be available in gentoo, as gentoo uses it in their live > cd. > > -tl > > On Fri, 12 May 2006 02:47:56 -0500 > Zac Slade <[EMAIL PROTECTED]> wrote: > > > On Thursday 11 May 2006 19:51, W.Kenworthy wrote: > > > What can I use for a compressed file system? I am looking at setting up > > > a loopback mounted filesystem that I want to use to store backups into. > > > Compression is needed as space will become a limitation in the future (I > > > want to do a whole system backup that so far is 2:1 compressed via > > > tar.bzip2. I am thinking of using dirvish into a compressed loopback > > > mount - but how do I set up a compressed fs? > > Have you tried reiserfs? As long as it is NOT mounted with the "notail" > > option it can sometimes save 50% on space compared to ext3/jfs/xfs > > depending > > on your usage. > > > > There is also a possiblility of using LVM2 snapshots also if you have LVM2 > > devices already set up. I'm not sure how dirvish is for backup and I'm not > > sure how good a loopback backup to a file really is anyway. That depends > > on > > the consistency of at least a partition anyway. Maybe you are trying to > > solve the wrong problem? > > > > -- > > Zac Slade > > [EMAIL PROTECTED] > > ICQ:1415282 YM:krakrjak AIM:ttyp99 > > -- > > [email protected] mailing list > > -- William Kenworthy <[EMAIL PROTECTED]> Home! -- [email protected] mailing list
