Hi Róbert,
Each data node is actually made up of 2 ndbd processes - the main one and its angel. If
you've set STOPONERROR to false then the agent will automatically restart the main ndbd
process should it die.
Regards, Andrew.
-----Original Message-----
From: Róbert Kohányi [mailto:kohanyi.robert@stripped]
Sent: 24 May 2012 12:54
To: cluster@stripped
Subject: Starting a single ndbd instance spawns two processes
I'm experimenting with a basic cluster configuration inside Virtual Box (running Ubuntu
10.04 LTS) using MySQL distrib mysql-5.5.22 ndb-7.2.6, for linux2.6 (x86_64). (I've
downloaded the latest generic Linux binary from the main website.)
I've successfully set up a working cluster inside a single VM (obviously just for
testing), which contains two ndb_mgmd, two ndbd and two mysqld nodes. (In production I
plan to run these on two or more
machines.)
I've posted my cluster configuration[1] and the outline of how I start my processes[2] to
pastebin.
Everything works fine, but I've noticed that there are four ndbd processes running on the
machine.
I've posted some info on these four processes[3] to pastebin too.
I've noticed that each two processes are in a parent-child relationship, and I figure that
this *could* be normal, but I'm not sure. Anyone has an explanation why is this happening?
(I didn't find info on this particular matter in the MySQL 5.5 Reference Manual - not yet
at least.)
Thanks in advance!
Regards,
Kohányi
[1]: http://pastebin.com/raw.php?i=j5jH8nrw
[2]: http://pastebin.com/raw.php?i=MuGRKDtQ
[3]: http://pastebin.com/raw.php?i=RNEJinjn
--
MySQL Cluster Mailing List
For list archives: http://lists.mysql.com/cluster
To unsubscribe: http://lists.mysql.com/cluster
