From: Andrew Morgan Date: May 25 2012 12:31pm Subject: RE: Starting a single ndbd instance spawns two processes List-Archive: http://lists.mysql.com/cluster/8351 Message-Id: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi R=C3=B3bert, 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 automatic= ally restart the main ndbd process should it die. Regards, Andrew. -----Original Message----- From: R=C3=B3bert Koh=C3=A1nyi [mailto:kohanyi.robert@stripped]=20 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 (ru= nning Ubuntu 10.04 LTS) using MySQL distrib mysql-5.5.22 ndb-7.2.6, for lin= ux2.6 (x86_64). (I've downloaded the latest generic Linux binary from the m= ain website.) I've successfully set up a working cluster inside a single VM (obviously ju= st 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 p= rocesses[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, an= d I figure that this *could* be normal, but I'm not sure. Anyone has an exp= lanation why is this happening? (I didn't find info on this particular matt= er in the MySQL 5.5 Reference Manual - not yet at least.) Thanks in advance! Regards, Koh=C3=A1nyi=20 [1]: http://pastebin.com/raw.php?i=3Dj5jH8nrw [2]: http://pastebin.com/raw.php?i=3DMuGRKDtQ [3]: http://pastebin.com/raw.php?i=3DRNEJinjn -- MySQL Cluster Mailing List For list archives: http://lists.mysql.com/cluster To unsubscribe: http://lists.mysql.com/cluster