On mercredi, 14 juin 2017 14.45:55 h CEST Philipp Storz wrote: > Hello guys, > > just take a look at this: > >> Software Compression: 99.3 % << > > I guess your disk is totally empty, and probably you store your disk in > something that provides thin provisioning. > > During backup, you read zeros that are provided by the thin provisioning > which is quite fast and which is compressed to only 1,8 GBytes but during > restore 268 GBytes of zeros are really allocated and filled with zeroes in > your disk image. > > So the speed you see is the speed that you can write data into your backend. > > I expect that the iowait during restore is close to 100%, and you could as > well do a > > "dd if=/dev/zero of=/path/to/your/disk/device" > > and have the same speed. > > In your case it would definitely make sense to backup the filesystem inside > of your vm instead of the vm image.
Oh damn how can I have forget that one, good catch Philipp ;-) Eventually, if it's sparse file, you can try to save them as they are See documentation about sparse. But don't try to (un)compress sparse file, so their sparse attribute are not touched. -- Bruno Friedmann Ioda-Net Sàrl www.ioda-net.ch Bareos Partner, openSUSE Member, fsfe fellowship GPG KEY : D5C9B751C4653227 irc: tigerfoot openSUSE Tumbleweed Linux 4.11.4-1-default x86_64 GNU/Linux, nvidia: 375.66 Qt: 5.7.1, KDE Frameworks: 5.34.0, Plasma: 5.10.1, kmail2 5.5.2 -- You received this message because you are subscribed to the Google Groups "bareos-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. For more options, visit https://groups.google.com/d/optout.
