Hi all, i've been weighing the pros and cons of running multiple concurrent 
mysqld's on one server, to have better control over what databases are on 
what physical disks.

System: 4 processor sun box running solaris with eighteen 36Gb drives.

The situation is that i have a bunch of databases on one server that can all 
be classified as either external use or internal use. The internal use 
databases are consistently hit pretty hard, and we want this to have minimal  
impact on the external use databases. Currently we're using 64 index MyISAM 
tables, and with carefully choosing mount points for various physical 
devices, we have the databases separated as we want them. 

It is my understanding that with InnoDB, all tables are put into the 
configured InnoDB file(s) together, which would violate what i am trying to 
accomplish.

The only solution i have come up with to control the physical location of 
InnoDB databases is to run multiple mysqld servers, each one with its InnoDB 
files on the desired device.

Has anyone experienced any success or failure with this sort of configuration?

This is the only reason holding us back from using InnoDB tables for this 
server. (we're using them on other machines)

Thanks much!

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