Some back-of-the-envelope calculations show that with the given database size, innodb_log_file_size and transfer bandwidth the redo log size can be overrun with the average redo log write rate of just 2.25 MB/sec. Which doesn't look much, as in there are good chances your average load during the backup is higher in 50% cases.
Eugene,
Some back-of- the-envelope calculations show that with the given database size, innodb_ log_file_ size and transfer bandwidth the redo log size can be overrun with the average redo log write rate of just 2.25 MB/sec. Which doesn't look much, as in there are good chances your average load during the backup is higher in 50% cases.
Do you have an estimate on the average redo generation rate on that server? You can find tips on how to figure it out in this post: http:// www.percona. com/blog/ 2012/10/ 08/measuring- the-amount- of-writes- in-innodb- redo-logs/