How to check mogilefs tracker is *actually* connects to MySQL slave?

[Kensuke Kaneko]

Hello, everyone.

I try to use "mogadm slave" option, and add one slave setting. It works fine.

So, I think how can I check tracker actually connect to MySQL slave
server and send SELECT queries to MySQL slave server.

I watched slave DB's processlist (mysqladmin -i 1 processlist), but
many mogilefs process is displaying every time.

When I shutdown MySQL master server, mogtool extract fail.

How to check or debug tracker's query sending?

These are my settings:

  #mogadm slave list
  10.0.111.222 --dsn=DBI:mysql:mogilefs:host=10.0.111.222
--username=mogile --password=mogpass

  #mogadm settings list
           enable_rebalance = 0
             schema_version = 9
         slave_10.0.212.117 =
DBI:mysql:mogilefs:host=10.0.111.222|mogile|mogpass
                 slave_keys = 10.0.111.222

mogtool works well. I can inject file, extract returns correct URLs.

# mogtool extract key -
Fetching piece 1...
        Trying http://10.0.111.111:7500/dev1/0/000/000/0000000273.fid...

# mogtool extract key -
Fetching piece 1...
        Trying http://10.0.111.222:7500/dev2/0/000/000/0000000273.fid...

I read this ML's archive searching keyword 'slave', but I can't find
nice answer for me.
Thanks.


-- 
Kensuke Kaneko <kyanny at gmail.com>