The buffer pool save/load that Percona first introduced and then was put into the general MySQL 5.6 codebase is a great idea.
I am not sure where to look in the 5.6 code but is there a disk buffer that can be increased to improve buffer pool load times?
This is for a 90GB cache, it takes roughly 40 to 50 minutes, which is “only” 30-40MB/sec
04:22:05 InnoDB: Loading buffer pool(s) from .//ib_buffer_pool
05:29:10 InnoDB: Buffer pool(s) load completed at 5:29:10
03:54:34 InnoDB: Loading buffer pool(s) from .//ib_buffer_pool
04:39:54 InnoDB: Buffer pool(s) load completed at 4:39:54
04:49:01 InnoDB: Loading buffer pool(s) from .//ib_buffer_pool
05:26:59 InnoDB: Buffer pool(s) load completed at 5:26:59
03:32:01 InnoDB: Loading buffer pool(s) from .//ib_buffer_pool
04:50:49 InnoDB: Buffer pool(s) load completed at 4:50:49
02:32:04 InnoDB: Loading buffer pool(s) from .//ib_buffer_pool
03:41:20 InnoDB: Buffer pool(s) load completed at 3:41:20