Am 23.12.2011 22:42, schrieb Wm Mussatto: >> so you have a REAL consistent backup with minimal downtime you can restore >> on any machine and pull dumps of whatever you really need instead of >> breaindead hughe dumps with long locking time while they are done or >> withut locking inconsistent state >> >> the first rsync runs while the server is online and the second one >> after mysqld is stopped takes a few moemnts because only changed data >> in the meantime have to be synced again >> >> this way you can backup many GB of mysql-data with minimal downtime >> and 100% consistence >> > This is true if the problem is many relatively small tables. Not sure how > well it would work if the problem was one or more very large tables.
does not matter if you look how rsync works i am using rsync ober the WAN each day for backups or some TB real data with only 3-6 GB traffic each day to give an specifiy example how good this works a part of this backups is a mysql-server for dbmail with one table-file (innodb) > 10 GB, the whole backup over a 22Mbit wire limited to 800KB/Sec. takes ususally around 30 minutes
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