On Thu, Nov 12, 2009 at 6:37 PM, Fajar A. Nugraha <fa...@fajar.net> wrote:
> On Thu, Nov 12, 2009 at 5:10 PM, Mr. Teo En Ming (Zhang Enming) > <space.time.unive...@gmail.com> wrote: > > Hi, > > > > I don't think I will be using the LVM snapshot method. I will simply > ensure > > that my domU is not running, > > Ah, so you can live with the down time. It makes things a lot simpler then. > > > then I proceed to do the losetup and kpartx > > procedure. > > Like others mentioned, you don't need losetup for LVs. It will only > make things slower. > > > Subsequently I will backup the MBR of my domU by dd-ing > > /dev/loopX and clone all the filesystems of the domU using fsarchiver. > > > > I would like to use fsarchiver because it can support LZMA compression. > LZMA > > can compress better than bzip2 and decompress 3x faster than bzip2. > > partimage only supports gzip and bzip2. > > > If your concern is the size and speed of backup, here's one final note > from me: you might want to look at zfs. Possible use scenarios : > - use opensolaris as dom0. Probably the most supported option when it > comes to xen + zfs, but you need to be familiar with how opensolaris > works. > - use external storage server running solaris/opensolaris as iscsi > SAN. Think of it as poor-man's Netapp. > - use zfs-fuse inside Linux dom0, and store domU storage as files > - use zfs-fuse on domU, and do backup from domU instead of dom0. > > With zfs, you'd get zfs snapshot (which is like instaneous in-place > backup), incremental block-level send (can greatly reduce backup > storage size if your data doesn't change often), optional transparent > compression for live data (like what ntfs has). > > -- > Fajar > I am not familiar with OpenSolaris but that may change with time. -- Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics) BEng(Hons)(Mechanical Engineering) Alma Maters: (1) Singapore Polytechnic (2) National University of Singapore My Primary Blog: http://teo-en-ming-aka-zhang-enming.blogspot.com My Secondary Blog: http://enmingteo.wordpress.com My Youtube videos: http://www.youtube.com/user/enmingteo Email: space.time.unive...@gmail.com Mobile Phone (Starhub Prepaid): +65-8369-2618 Street: Bedok Reservoir Road Country: Singapore
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