MySQL Bugs: #16386: DD: Cluster fails to create more then 5 logfile groups in extended dll testing

Bug #16386	DD: Cluster fails to create more then 5 logfile groups in extended dll testing
Submitted:	11 Jan 2006 20:40	Modified:	14 Mar 2006 10:34
Reporter:	Jonathan Miller	Email Updates:
Status:	Closed	Impact on me:	None
Category:	MySQL Cluster: Cluster (NDB) storage engine	Severity:	S2 (Serious)
Version:	5.1.6-alpha	OS:	Linux (Linux)
Assigned to:	Jonas Oreland	CPU Architecture:	Any

Description:
Using the following test case from ndb_dd_ddl_extended.test the cluster can not more then 5 logfile groups. 

I have spent sometime trying to troubleshoot this, but no error or trace files are created for troubleshooting.

--disable_warnings
DROP DATABASE IF EXISTS mysqltest;
CREATE DATABASE mysqltest;
--enable_warnings

let $cnt= 6;
while ($cnt)
{
eval CREATE LOGFILE GROUP lg$cnt
ADD UNDOFILE './lg$cnt/undofile.dat'
INITIAL_SIZE 1M
UNDO_BUFFER_SIZE = 1M
ENGINE=NDB;

eval CREATE TABLESPACE ts$cnt
ADD DATAFILE './lg$cnt/datafile.dat'
USE LOGFILE GROUP lg$cnt
INITIAL_SIZE 1M
ENGINE NDB;

eval CREATE TABLE mysqltest.t$cnt (c1 INT, c2 DOUBLE, c3 FLOAT, c4 TIMESTAMP, c5 TEXT,
c6 LONGBLOB, c7 CHAR, c8 MEDIUMINT AUTO_INCREMENT, c9 BIT(8), c10 DECIMAL(10,2),
c11 char(10), c12 VARCHAR(150), PRIMARY KEY (c8)) TABLESPACE ts$cnt STORAGE DISK
ENGINE=NDB;

eval INSERT INTO mysqltest.t$cnt VALUES(1,1,2.00,'20050101000000',"Testing",repeat('a',1*1024),"T",NULL,b'111111',100.00,"MoreTesting","Disk DataDisk DataDisk DataDisk DataDisk Data");
eval INSERT INTO mysqltest.t$cnt VALUES(2,2,3.00,'20060101000000',"Testing",repeat('b',1*1024),"S",NULL,b'101111',300.00,"MoreTesting","Disk DataDisk DataDisk DataDisk DataDisk Data");
eval INSERT INTO mysqltest.t$cnt VALUES(3,3,1.00,'20070101000000',"Testing",repeat('c',1*1024),"W",NULL,b'111111',1110.10,"MorTeing","Disk DataDisk DataDisk DataDisk DataDisk Data");

dec $cnt;
}

let $cnt= 6;
while ($cnt)
{
eval SELECT hex(c9) FROM mysqltest.t$cnt WHERE c1 = 2;
eval SELECT c10 FROM mysqltest.t$cnt WHERE c8 = 3;

eval DROP TABLE mysqltest.t$cnt;

eval ALTER TABLESPACE ts$cnt DROP DATAFILE './lg$cnt/datafile.dat' ENGINE = NDB;

eval DROP TABLESPACE ts$cnt
ENGINE=NDB;

eval DROP LOGFILE GROUP lg$cnt
ENGINE=NDB;

dec $cnt;
}

How to repeat:
see above

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/3440

Pushed into 5.1.8
Note however, that I also added a limitation for 1 logfile group, due to bugs in system restart.

This means that it is now possible to have only one logfile group per cluster at any one time? If so, how does this affect the default logfile group if I've heard some things about (but haven't yet documented)?

It meant that before this bug was fixed, there was a resource shortage preventing
  more than 5 to be created, this has been fixed.

Now I added an explicit check for max 1.

Thank you for your bug report. This issue has been addressed in the
documentation. The updated documentation will appear on our website
shortly, and will be included in the next release of the relevant
product(s).

Additional info:

Documented feature in 5.1.8 changelog and associated sections of the 5.1 Manual. Closed.