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How to verify work of Data Node in MySQL cluster?
Posted by: alibek Ismailov
Date: May 13, 2019 02:19AM

Hi, I configured Mysql cluster. I have Management and SQL on 1 node and 2 Data nodes.
Command "ndb_mgm> show" gives me this:
[ndbd(NDB)] 2 node(s)
id=2 @1.1.1.2 (mysql-5.7.26 ndb-7.6.10, Nodegroup: 0)
id=3 @1.1.1.3 (mysql-5.7.26 ndb-7.6.10, Nodegroup: 0, *)
[ndb_mgmd(MGM)] 1 node(s)
id=1 @1.1.1.1 (mysql-5.7.26 ndb-7.6.10)
[mysqld(API)] 1 node(s)
id=4 @1.1.1.1 (mysql-5.7.26 ndb-7.6.10)

Status of Data node:
[ndbd] INFO -- Angel connected to '1.1.1.2:1186'
[ndbd] INFO -- Angel allocated nodeid: 2

But on two Data nodes i don't have .dat files. I have only folders LCP, D1, D2
(according to article https://dev.mysql.com/doc/ndb-internals/en/ndb-internals-ndbd-filesystemdir-files.html).
Is it correct or no? How can i check work of Data nodes?
Should i start MySQL server on Data nodes?

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