Les Mikesell said: > On Wed, 2006-02-01 at 08:39, Carl Wilhelm Soderstrom wrote: > > On 01/31 08:34 , Dan Pritts wrote: > > > On Mon, Jan 30, 2006 at 08:28:17AM -0600, Carl Wilhelm Soderstrom wrote: > > > > only solution I can think of, would be to use a distributed replicated block > > > > device (DRBD) to mirror the two disks across the network. that 10Mbit/s > > > > bandwidth will be pretty limiting of performance tho. (Also, I've seen DRBD > > > > replication fail a number of times... it's hardly bulletproof tech). > > > > > > Veritas has this kind of functionality in their volume manager product > > > for Solaris, et al. not cheap but it reportedly works well. > > > > there's also a company called Constant Data that has a similar product. I > > have no experience with it, other than sitting down and having a beer & > > burger with a sysadmin from there. > > What would be really nice would be if you could make an LVM snapshot > and rsync the snapshot as a partition image to a remote file or > partition while the source system keeps working.
I've been wondering recently about what technology online backup services use. Both LiveVault and AmeriVault do nearly instantaneous and continuous copies of the data that changes. Sounds like something akin to DRBD, which is constantly intercepting writes to disk, rather than periodical snapshots, as with LVM. Besides that they do some kind of "deltaing", which should further reduce necessary bandwidth. A technology like that would spread replication rather than being concentrated to specific backup windows, so it's more likely to work well over a slow connection. Bernardo Rechea ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=103432&bid=230486&dat=121642 _______________________________________________ BackupPC-users mailing list BackupPC-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/backuppc-users http://backuppc.sourceforge.net/
