On 01/28 08:26 , David Rees wrote: > Is the backup RAID array at least the same size as the original? Your > best bet is probably to use tar + gzip to send the whole raw partition > over the network to the remote machine, but for this to work, you will > need to be able to unmount the primary so that it doesn't change > during the backup (which will take a while over a 10Mbps link).
dd over netcat, possibly piped through gzip (experiment for yourself), is likely going to be faster. tar follows the filesystem structure, causing a lot of disk seeks and redundant reads (because of hardlinks). dd will beat the pants off it in most cases. Mind you, 1.5TB over a 10M link is likely to be a several-days-long operation. Not a very tractable problem, as things exist now. 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). -- Carl Soderstrom Systems Administrator Real-Time Enterprises www.real-time.com ------------------------------------------------------- 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 [email protected] https://lists.sourceforge.net/lists/listinfo/backuppc-users http://backuppc.sourceforge.net/
