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ClusterJPA with non-jta Data Source backup? (no replies)

January 13, 2015, 9:58 am
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I'm currently using openjpa with mysql connector/j to my mysql cluster (using dbcp2 and jdbc:mysql:loadbalance).
I'm doing this in my persistence file using:
<property name="javax.persistence.nonJtaDataSource" value="java:/comp/env/jdbc/mydatasource" />

I want to start using clusterjpa with the NDB brokerfactory, but so far all the examples I have seen have the backup JDBC data source specified directly in the persistence file (url,user,pass).
Is it possible to use my non-jta data source with pooling instead?

On a side note, is there any updated docs on compiling/running with clusterjpa? The last official stuff seems from 7.1.2. Or has nothing really changed since then?

Thanks!

-Tony
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data loss after restart the cluster (1 reply)

January 21, 2015, 3:16 am
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I am using Mysql cluster 7.3.7 and got a problem when I shutdown the cluster from management node and again start the cluster I got result with NO data in mysql data node all the data is loss.
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How to tune for BatchByteSize (no replies)

January 21, 2015, 10:53 pm
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Hi,

How to tune for BatchByteSize, BatchSize, MaxScanBatchSize and TotalSendBufferMemory ?

I need to tune these variables in mysql cluster.

Please help me.
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mysqld api node (no replies)

January 27, 2015, 11:29 am
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Hi Guys

I setup mgm node and two data nodes and I put mysql node in mgm node, I have NDB 7.3 Redhat 6.6. When I do show command, data nodes connected but sql node node not. what is the issue?

Also if I want to fully test the cluster failover, what I have to do?? so from sql node do like : mysql -h data1 and data2, create a dummy database and tables then shutdown one node and add a row to table?? something like that?

Please clear these 2 things for me. many Thanks
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error 4243 'Index not found' while adding constraint (1 reply)

January 28, 2015, 6:02 am
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Hi,

I am getting error 4243 'Index not found' from NDBCLUSTER") 'ALTER TABLE aggregate_metadata ADD CONSTRAINT uniq_aggregate_metadata0aggregate_id0key0deleted UNIQUE (aggregate_id, `key`, deleted)'

The table I try to add constraint to:

CREATE TABLE `aggregate_metadata` (
`created_at` datetime DEFAULT NULL,
`updated_at` datetime DEFAULT NULL,
`deleted_at` datetime DEFAULT NULL,
`id` int(11) NOT NULL AUTO_INCREMENT,
`aggregate_id` int(11) NOT NULL,
`key` varchar(255) NOT NULL,
`value` varchar(255) NOT NULL,
`deleted` int(11) DEFAULT NULL,
PRIMARY KEY (`id`),
KEY `aggregate_id` (`aggregate_id`),
CONSTRAINT `FK_262_282` FOREIGN KEY(`aggregate_id`) REFERENCES `aggregates` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=ndbcluster DEFAULT CHARSET=utf8;

Can I workaround this problem? Anything to change in config.ini?

Thanks for any hints!
Vladislav
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No free node id found for mysqld(API) when executing ndbinfo_sellect_all logbuffers logspaces (1 reply)

January 29, 2015, 9:34 am
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Hello.

I'm running MySQL Cluster 7.3.7 on a CentOS 6.6 x64 with two Data nodes, each one in a separate host, and a Management and SQL node on the same host.

I'm following the documetation here: http://dev.mysql.com/doc/refman/5.6/en/mysql-cluster-programs-ndbinfo-select-all.html

and they give this example: ndbinfo_select_all logbuffers logspaces

I tried running this in the Management Node (which is also the SQL Node) and I got this error: Unable to connect to management server.
I checked the log file (/var/lib/mysql-cluster/ndb_1_cluster.log) and the error is this:

2015-01-29 17:17:39 [MgmtSrvr] WARNING -- Failed to allocate nodeid for API at x.x.x.20. Returned error: 'No free node id found for mysqld(API).'

(x.x.x.20 is the IP address of the Management node)

I've already searched for a solution, but I didn't found anything, maybe the answer is really obvious, but since I'm a newbie in the cluster architecture, I'm not seing it :/

Can anyone help?

Thanks a lot.

Regards,
Vilhena
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Learn how to ensure business continuity with geographically distributed multi-master MySQL clusters (no replies)

January 30, 2015, 1:30 pm
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Global data access can greatly expand the reach of your business. Continuent’s multi-site multi-master solutions enable applications to accept database traffic in multiple locations across on-premises and vCloud Air.

Join us on February 10th to learn about the benefits of combining multiple Continuent database clusters into a global multi-site multi-master topology.

Register at http://bit.ly/1L53VmN
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Lock wait timeout exceeded; try restarting transaction (no replies)

January 31, 2015, 4:49 am
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there are two computer, one act as manage node and data node, the other act as sql node and data node.
when i use 155 clients to excute 'insert' statement, after few minutes, here comes the err below:
Exception in thread "main" java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoader.java:58)
Caused by: java.sql.SQLException: Lock wait timeout exceeded; try restarting transaction
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1055)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3515)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3447)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1951)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2101)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2548)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2477)
at com.mysql.jdbc.StatementImpl.execute(StatementImpl.java:741)
at com.mysql.jdbc.StatementImpl.execute(StatementImpl.java:587)
at test.Test.main(Test.java:83)

how can i prevent from it?
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composite column for primary key in cluster (no replies)

February 10, 2015, 10:14 pm
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Hi,

Are composite primary keys efficient in mysql cluster?

This is script:
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CREATE TABLE `Table1` (
`CONTS_ID` varchar(20) NOT NULL,
`ASSET_ID` varchar(20) NOT NULL,
`EFCT_START_DT` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
`EFCT_END_DT` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
`INSRT_USER_ID` varchar(10) DEFAULT NULL,
`INSRT_DT` timestamp NULL DEFAULT NULL,
`UPDT_USER_ID` varchar(10) DEFAULT NULL,
`UPDT_DT` timestamp NULL DEFAULT NULL,
`ASSET_TYPE_CD` varchar(2) NOT NULL,
PRIMARY KEY (`CONTS_ID`,`ASSET_ID`,`EFCT_START_DT`,`EFCT_END_DT`)
) ENGINE=NDBCLUSTER DEFAULT CHARSET=utf8;
-----------------------

I just changed storeage from innodb to ndbcluster.
Some queries can't use the primary key for join tables and explain result is full scan .

Are composite primary keys good for mysql cluster?
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Lock wait timeout and other errors (no replies)

February 13, 2015, 3:57 pm
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Hello. I'm trying to use MySQL Cluster, but sometimes queries take long time and i get error "lock wait timeout exceeded".

There are following strings in logs:

2015-02-13 23:41:40 27483 [Note] NDB Binlog: Node: 1, down, Subscriber bitmask 00
2015-02-13 23:41:40 27483 [Note] NDB Binlog: Node: 2, down, Subscriber bitmask 00
2015-02-13 23:41:40 27483 [Note] NDB Binlog: cluster failure for ./mysql/ndb_schema at epoch 24339/0.
2015-02-13 23:41:40 27483 [Note] NDB Binlog: cluster failure for ./mysql/ndb_apply_status at epoch 24339/0.
2015-02-13 23:41:40 27483 [Note] Restarting Cluster Binlog
2015-02-13 23:41:40 27483 [Note] NDB Binlog: Ndb object created with reference : 0x80030035, name : Ndb Binlog schema change monitoring
2015-02-13 23:41:40 27483 [Note] NDB Binlog: Ndb object created with reference : 0x80050035, name : Ndb Binlog data change monitoring
2015-02-13 23:41:40 27483 [Note] NDB Binlog: DISCOVER TABLE Event: REPL$mysql/ndb_schema
2015-02-13 23:41:40 27483 [ERROR] NDB Binlog: Creating NdbEventOperation failed for REPL$mysql/ndb_schema
2015-02-13 23:41:40 27483 [ERROR] NDB Binlog:FAILED CREATE (DISCOVER) EVENT OPERATIONS Event: REPL$mysql/ndb_schema
2015-02-13 23:41:41 27483 [Note] table './lsd_test/t_events' opened read only
2015-02-13 23:41:41 27483 [Note] NDB Binlog: DISCOVER TABLE Event: REPL$mysql/ndb_schema
2015-02-13 23:41:41 27483 [ERROR] NDB Binlog: Creating NdbEventOperation failed for REPL$mysql/ndb_schema
2015-02-13 23:41:41 27483 [ERROR] NDB Binlog:FAILED CREATE (DISCOVER) EVENT OPERATIONS Event: REPL$mysql/ndb_schema
2015-02-13 23:41:41 27483 [Note] table './lsd_test/t_messages' opened read only


(every table opened read only, so i didn't include all those strings)

2015-02-13 23:41:41 27483 [Note] table './lsd_test/t_event_members' opened read only
2015-02-13 23:41:42 27483 [Note] NDB Binlog: DISCOVER TABLE Event: REPL$mysql/ndb_schema
2015-02-13 23:41:42 27483 [ERROR] NDB Binlog: Creating NdbEventOperation failed for REPL$mysql/ndb_schema
2015-02-13 23:41:42 27483 [ERROR] NDB Binlog:FAILED CREATE (DISCOVER) EVENT OPERATIONS Event: REPL$mysql/ndb_schema
2015-02-13 23:41:43 27483 [Note] NDB Binlog: DISCOVER TABLE Event: REPL$mysql/ndb_schema
2015-02-13 23:41:43 27483 [ERROR] NDB Binlog: Creating NdbEventOperation failed for REPL$mysql/ndb_schema
2015-02-13 23:41:43 27483 [ERROR] NDB Binlog:FAILED CREATE (DISCOVER) EVENT OPERATIONS Event: REPL$mysql/ndb_schema
2015-02-13 23:41:44 27483 [Note] table './lsd_test/t_relations' opened read only
2015-02-13 23:41:44 27483 [Note] NDB Binlog: DISCOVER TABLE Event: REPL$mysql/ndb_schema
2015-02-13 23:42:11 27483 [Note] table './lsd_test/t_event_members' opened read only
2015-02-13 23:42:14 27483 [Note] NDB Binlog: logging ./mysql/ndb_schema (UPDATED,USE_WRITE)
2015-02-13 23:42:14 27483 [Note] NDB Binlog: DISCOVER TABLE Event: REPL$mysql/ndb_apply_status
2015-02-13 23:42:14 27483 [Note] table './lsd_test/t_relations' opened read only
2015-02-13 23:42:14 27483 [Note] NDB Binlog: logging ./mysql/ndb_apply_status (UPDATED,USE_WRITE)
2015-02-13 23:42:14 27483 [Note] NDB: Cleaning stray tables from database 'information_schema'
2015-02-13 23:42:14 27483 [Note] NDB: Cleaning stray tables from database 'lsd_test'
2015-02-13 23:42:14 27483 [Note] NDB: Cleaning stray tables from database 'lsd_test_innodb'
2015-02-13 23:42:14 27483 [Note] NDB: Cleaning stray tables from database 'mytest'
2015-02-13 23:42:14 27483 [Note] NDB: Cleaning stray tables from database 'ndbinfo'
2015-02-13 23:42:14 27483 [Note] NDB: Cleaning stray tables from database 'performance_schema'
2015-02-13 23:42:14 27483 [Note] NDB: Cleaning stray tables from database 'test'
2015-02-13 23:42:14 27483 [Note] NDB: Cleaning stray tables from database 'test1'
2015-02-13 23:42:14 27483 [Note] NDB: Cleaning stray tables from database 'test_ndb'
2015-02-13 23:42:14 [NdbApi] INFO -- Flushing incomplete GCI:s < 24372/9
2015-02-13 23:42:14 [NdbApi] INFO -- Flushing incomplete GCI:s < 24372/9
2015-02-13 23:42:14 27483 [Note] NDB Binlog: starting log at epoch 24372/9
2015-02-13 23:42:14 27483 [Note] NDB Binlog: ndb tables writable



I have following settings in config.ini:
TransactionDeadlockDetectionTimeout=52000 #default 1200
MaxNoOfConcurrentTransactions=16384
MaxNoOfConcurrentOperations=100000

BatchSizePerLocalScan=512
FragmentLogFileSize=256M
NoOfFragmentLogFiles=22 # 6xDataMemory [in MB]/(4 *FragmentLogFileSize [in MB])

RedoBuffer=48M
MaxNoOfExecutionThreads=4
StopOnError=false
LockPagesInMainMemory=1

#severalnines settings
TransactionBufferMemory=8M

TimeBetweenGlobalCheckpoints=1000
TimeBetweenEpochs=100

TimeBetweenEpochsTimeout=0
DiskCheckpointSpeedInRestart=100M
DiskCheckpointSpeed=10M
TimeBetweenLocalCheckpoints=20

### Heartbeating
HeartbeatIntervalDbDb=15000
HeartbeatIntervalDbApi=15000

### Params for setting logging
MemReportFrequency=30
BackupReportFrequency=10
LogLevelStartup=15
LogLevelShutdown=15
LogLevelCheckpoint=8
LogLevelNodeRestart=15

### Params for BACKUP
BackupMaxWriteSize=1M
BackupDataBufferSize=24M
BackupLogBufferSize=16M
BackupMemory=40M

TimeBetweenWatchdogCheckInitial=60000
TransactionInactiveTimeout=800
RedoOverCommitCounter=3
RedoOverCommitLimit=20
NoOfFragmentLogParts=4

### Increasing the LongMessageBuffer b/c of a bug (20090903)
LongMessageBuffer=16M


I reset TransactionInactiveTimeout to 800 from severalnines config and TransactionDeadlockDetectionTimeout to 52000 from default.

Also there is my.cnf parameters:
#severalnines
ndbcluster=1
ndb-connectstring="192.168.1.5:1186,192.168.1.6:1186"
ndb-force-send=1
ndb-use-exact-count=0
ndb-extra-logging=1
ndb-batch-size=24M
ndb-autoincrement-prefetch-sz=1024
#OTHER THINGS, BUFFERS ETC
key_buffer_size = 32M
max_allowed_packet = 128M
#thread_cache_size=1024
#myisam_sort_buffer_size = 8M
memlock=0
sysdate_is_now=1
thread-cache-size=128
###QUERY CACHE IS DISABLED
###THE QUERY CACHE IN MYSQL CLUSTER CAN HAMPER PERFORMANCE A LOT. HENCE IT IS DISABLED
###BECAUSE INVALIDATION OF IT TAKES TIME (REMEMBER, IT IS A DISTRIBUTED ENVIRONMENT)
###ONLY ENABLE IT AND USE SQL_CACHE TO CACHE ONLY CERTAIN QUERIES ON READONLY TABLES
query_cache_type = 0
query_cache_size = 0


What can I do?
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Need help in installation (no replies)

February 17, 2015, 5:05 pm
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I am trying to follow the instruction of "18.2.2.1 Installing a MySQL Cluster Binary Release on Linux" http://dev.mysql.com/doc/refman/5.6/en/mysql-cluster-install-linux-binary.html , to install MySQL Cluster in a Ubuntu 14.04 server.

But I failed in the first step. In installing into SQL Node, I am supposed to extract mysql-cluster-gpl-7.x.x-linux2.6.tar.gz. But where can I download this file?

From the download area http://dev.mysql.com/downloads/cluster , I can see mysql-cluster-gpl-7.x.x-linux-glibc2.5-x86_64.tar.gz which is mentioned as installation package for the "Data Node" in the instruction, and mysql-cluster-gpl-7.x.x.tar.gz for source code.

Please direct me to download the installation package for the SQL Node, thank you.
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Unable to start one of the management servers (no replies)

February 17, 2015, 6:24 pm
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One of my management servers has recently crashed/raid failure.

I have reinstalled it (Centos 6) but i'm unable to start the actual ndb_mgmd

I am trying to start it via /usr/sbin/ndb_mgmd --ndb-nodeid=1 -c "192.168.1.1:1186" -f /etc/config.ini --configdir=/etc/ --initial

Tried both with "--initial" and without.

The log shows the following:
2015-02-18 03:09:38 [MgmtSrvr] INFO -- Got initial configuration from '/etc//config.ini', will try to set it when all ndb_mgmd(s) started
2015-02-18 03:09:38 [MgmtSrvr] INFO -- Id: 1, Command port: *:1186
2015-02-18 03:09:38 [MgmtSrvr] WARNING -- Failed to convert connection from '192.168.1.228:57950' to transporter: line: 498 : Incorrect state for node 9 state: is connected (2)
2015-02-18 03:09:38 [MgmtSrvr] INFO -- MySQL Cluster Management Server mysql-5.6.15 ndb-7.3.4 started
2015-02-18 03:09:38 [MgmtSrvr] INFO -- Node 1: Node 1 Connected
2015-02-18 03:09:38 [MgmtSrvr] INFO -- Node 1: Node 2 Connected
2015-02-18 03:09:38 [MgmtSrvr] WARNING -- Failed to convert connection from '192.168.1.231:41713' to transporter: line: 498 : Incorrect state for node 12 state: is connected (2)
2015-02-18 03:09:38 [MgmtSrvr] WARNING -- Failed to convert connection from '192.168.1.226:41587' to transporter: line: 498 : Incorrect state for node 7 state: is connected (2)
2015-02-18 03:09:38 [MgmtSrvr] WARNING -- Failed to convert connection from '192.168.1.225:43365' to transporter: line: 498 : Incorrect state for node 6 state: is connected (2)
2015-02-18 03:09:38 [MgmtSrvr] WARNING -- Failed to convert connection from '192.168.1.222:60124' to transporter: line: 498 : Incorrect state for node 3 state: is connected (2)
2015-02-18 03:09:38 [MgmtSrvr] WARNING -- Failed to convert connection from '192.168.1.232:51626' to transporter: line: 498 : Incorrect state for node 13 state: is connected (2)
2015-02-18 03:09:38 [MgmtSrvr] WARNING -- Failed to convert connection from '192.168.1.230:42865' to transporter: line: 498 : Incorrect state for node 11 state: is connected (2)
2015-02-18 03:09:38 [MgmtSrvr] WARNING -- Failed to convert connection from '192.168.1.223:50200' to transporter: line: 498 : Incorrect state for node 4 state: is connected (2)
2015-02-18 03:09:38 [MgmtSrvr] WARNING -- Failed to convert connection from '192.168.1.229:41253' to transporter: line: 498 : Incorrect state for node 10 state: is connected (2)
2015-02-18 03:09:38 [MgmtSrvr] WARNING -- Failed to convert connection from '192.168.1.227:34704' to transporter: line: 498 : Incorrect state for node 8 state: is connected (2)
2015-02-18 03:09:38 [MgmtSrvr] WARNING -- Failed to convert connection from '192.168.1.224:53797' to transporter: line: 498 : Incorrect state for node 5 state: is connected (2)
2015-02-18 03:09:38 [MgmtSrvr] WARNING -- Failed to convert connection from '192.168.1.233:39696' to transporter: line: 498 : Incorrect state for node 14 state: is connected (2)
2015-02-18 03:09:38 [MgmtSrvr] INFO -- Node 2 connected
2015-02-18 03:09:38 [MgmtSrvr] INFO -- Node 1: Node 9 Connected
2015-02-18 03:09:38 [MgmtSrvr] INFO -- Node 1 connected
2015-02-18 03:09:38 [MgmtSrvr] ERROR -- Terminating

I could not find much information about this error, normally it should be connected to the firewall or selinux, but in this case, both selinux and iptables are disabled.

Many thanks!
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Can't start MCM (no replies)

February 19, 2015, 7:09 am
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Good afternoon everyone,
I'm having troubles when trying to start one of my mcm agents. Everything has been working smoothly for quite a long time, but it has suddenly stopped. When I try to start the mcmc this is what I see:

mysql@vm-leg-promesa-04-t:/var/lib/mysql $ /usr/mcm1.3.3/bin/mcmd --log-file=/var/log/mcm/mcmd.log --manager-directory=/var/mcm_data --daemon
mysql@vm-leg-promesa-04-t:/var/lib/mysql $ ps -ef | grep mcm
mysql 5485 1 99 15:53 ? 00:14:44 /usr/mcm1.3.3/libexec/mcmd --plugin-dir=/usr/mcm1.3.3/lib/mcmd --log-file=/var/log/mcm/mcmd.log --manager-directory=/var/mcm_data --daemon
mysql@vm-leg-promesa-04-t:/var/lib/mysql $

mysql@vm-leg-promesa-04-t:/var/lib/mysql $ tail -f /var/log/mcm/mcmd.log
2015-02-19 16:08:38.133: (warning) last message repeated 1 times
2015-02-19 16:08:38.133: (warning) [T0x606010 chass]: Changed type to ENUM : Changing value : query_cache_type for mysqld ==> 0
2015-02-19 16:08:38.181: (warning) last message repeated 1 times
2015-02-19 16:08:38.181: (warning) [T0x606010 chass]: Changed type to ENUM : Changing value : query_cache_type for mysqld ==> off
2015-02-19 16:08:38.229: (warning) last message repeated 1 times
2015-02-19 16:08:38.229: (warning) [T0x606010 chass]: Changed type to ENUM : Changing value : query_cache_type for mysqld ==> 0
2015-02-19 16:08:38.277: (warning) last message repeated 1 times
2015-02-19 16:08:38.277: (warning) [T0x606010 chass]: Changed type to ENUM : Changing value : query_cache_type for mysqld ==> off
2015-02-19 16:08:38.325: (warning) last message repeated 1 times
2015-02-19 16:08:38.325: (warning) [T0x606010 chass]: Changed type to ENUM : Changing value : query_cache_type for mysqld ==> 0
2015-02-19 16:08:38.374: (warning) last message repeated 1 times
2015-02-19 16:08:38.374: (warning) [T0x606010 chass]: Changed type to ENUM : Changing value : query_cache_type for mysqld ==> off
2015-02-19 16:08:38.423: (warning) last message repeated 1 times
2015-02-19 16:08:38.423: (warning) [T0x606010 chass]: Changed type to ENUM : Changing value : query_cache_type for mysqld ==> 0
2015-02-19 16:08:38.471: (warning) last message repeated 1 times
2015-02-19 16:08:38.471: (warning) [T0x606010 chass]: Changed type to ENUM : Changing value : query_cache_type for mysqld ==> off
2015-02-19 16:08:38.519: (warning) last message repeated 1 times
2015-02-19 16:08:38.519: (warning) [T0x606010 chass]: Changed type to ENUM : Changing value : query_cache_type for mysqld ==> 0
2015-02-19 16:08:38.568: (warning) last message repeated 1 times
2015-02-19 16:08:38.568: (warning) [T0x606010 chass]: Changed type to ENUM : Changing value : query_cache_type for mysqld ==> off
2015-02-19 16:08:38.616: (warning) last message repeated 1 times
2015-02-19 16:08:38.616: (warning) [T0x606010 chass]: Changed type to ENUM : Changing value : query_cache_type for mysqld ==> 0
2015-02-19 16:08:38.664: (warning) last message repeated 1 times
2015-02-19 16:08:38.664: (warning) [T0x606010 chass]: Changed type to ENUM : Changing value : query_cache_type for mysqld ==> off
2015-02-19 16:08:38.712: (warning) last message repeated 1 times
2015-02-19 16:08:38.712: (warning) [T0x606010 chass]: Changed type to ENUM : Changing value : query_cache_type for mysqld ==> 0
2015-02-19 16:08:38.761: (warning) last message repeated 1 times
2015-02-19 16:08:38.761: (warning) [T0x606010 chass]: Changed type to ENUM : Changing value : query_cache_type for mysqld ==> off
2015-02-19 16:08:38.810: (warning) last message repeated 1 times
2015-02-19 16:08:38.810: (warning) [T0x606010 chass]: Changed type to ENUM : Changing value : query_cache_type for mysqld ==> 0


Any idea of what's happening and how to fix it?

Regards,
Gabriel Crespo
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Error ndb_mgmd Windows (no replies)

February 20, 2015, 3:02 am
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Hello everyone.

I am trying to set up a MySQL Cluster on Windows 2008 R2.
I tried installing via .msi me

I have all set ( Bin & data ) in a folder C: \ mysql
I use that as a manager and SQL Server Node.

When I try to start the ndb_mgmd ( first thing to do according to the official MySQL documentation) I get the following errors:



Can you help me? Thank you to you.
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recommended thread config for 4 cpu data node? (no replies)

February 23, 2015, 9:34 am
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I'd like to know if there is, or if anyone has, a recommended ThreadConfig/Lock<x>ThreadtoCPU/MaxNoOfExecutionThreads threads config for a 4 CPU/core data node?

Also if it's still recommended to turn RealTimeScheduler off with ndbmtd. I know example configs stated this.

The machine is dedicated to the data node, has eth0 and eth1, eth1 for data node traffic, CentOS 6, EC2 (r3.xlarge).

Thanks
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Test My Cluster ? (8 replies)

February 26, 2015, 1:16 am
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Hello everyone.

I received as a project of a company to make a MySQL clustering on a WAMP environment.
We're not going to dwell on the environment "WAMP", just know that I have to do this on Windows. I prefer my first focus on the pure Cluster than the rest.
I'll try to make a diagram that shows you more precisely my ultimate goal (which can be interesting).

So here's what I use now (I do not have the hardware limitation since I work on a hypervisor)
- 1 Windows Server 2008
- 2 Windows 7

For those who know, to make a MySQL Cluster requires at a minimum:
- 2 NBDB (Data Node): W7 DATA1 & W7 DATA2 (191.168.2.251 & .252).
- 1 SQL Server (mysqld): Windows Server 2008 R2 (191.168.2.3).
- 1 Manager (MGMD): Windows Server 2008 R2 (same as the mysqld) (191.168.2.3).
For the moment I tried to follow a lot of tutorials without really understand and get there (especially confusing saw that everything from in all directions) and apparently I get to make the connection between them:



Now I have a little problem, I do not know how to go test it .. I am trying to connect to MySQL on each DATA (to see if it is replica) but I can not I get an error:

"ERROR 2003 (HY000): Can not connect to MySQL server on localhost (10061)". Then I have difficulty understanding how a client that connects to the front-end (MySQ) written on the DATA ..
Well, I hope you can enlighten me.

Thank you,
Original.
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Unable to start Node and API (1 reply)

February 25, 2015, 1:15 am
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Hi there, problem is my DB nodes are stuck at starting and API can't get connected.

my config.ini file as below:

[NDB_MGMD DEFAULT]
Portnumber=1186


[NDB_MGMD]
NodeId=51
HostName=192.168.168.151
DataDir=/opt/SQL/51/
Portnumber=1186
ArbitrationRank=1

[TCP DEFAULT]
SendBufferMemory=8M
ReceiveBufferMemory=8M

[NDBD DEFAULT]
BackupMaxWriteSize=1M
BackupDataBufferSize=16M
BackupLogBufferSize=4M
BackupMemory=20M
BackupReportFrequency=10
MemReportFrequency=30
LogLevelStartup=15
LogLevelShutdown=15
LogLevelCheckpoint=8
LogLevelNodeRestart=15
DataMemory=700M
IndexMemory=175M
MaxNoOfTables=4096
MaxNoOfTriggers=3500
NoOfReplicas=2
StringMemory=25
DiskPageBufferMemory=64M
SharedGlobalMemory=20M
LongMessageBuffer=32M
MaxNoOfConcurrentTransactions=16384
BatchSizePerLocalScan=512
FragmentLogFileSize=256M
NoOfFragmentLogFiles=5
RedoBuffer=64M
MaxNoOfExecutionThreads=2
StopOnError=false
LockPagesInMainMemory=1
TimeBetweenEpochsTimeout=32000
TimeBetweenWatchdogCheckInitial=60000
TransactionInactiveTimeout=60000
HeartbeatIntervalDbDb=1500
HeartbeatIntervalDbApi=1500
MaxNoOfConcurrentOperations=150000
MaxNoOfAttributes=10000
MaxNoOfOrderedIndexes=512

[NDBD]
NodeId=1
HostName=192.168.168.153
DataDir=/opt/MySQL_Cluster/1/

[NDBD]
NodeId=2
HostName=192.168.168.154
DataDir=/opt/MySQL_Cluster/2/


[MYSQLD DEFAULT]

[MYSQLD]
NodeId=61
HostName=192.168.168.151

[MYSQLD]
NodeId=63
HostName=192.168.168.152

[MYSQLD]
NodeId=65

========================================

Current status:

[root@SQL-Arbiter ~]# ndb_mgm -e show
Connected to Management Server at: localhost:1186
Cluster Configuration
---------------------
[ndbd(NDB)] 2 node(s)
id=1 @192.168.168.153 (mysql-5.6.15 ndb-7.3.4, starting, Nodegroup: 0, *)
id=2 @192.168.168.154 (mysql-5.6.15 ndb-7.3.4, starting, Nodegroup: 0)

[ndb_mgmd(MGM)] 1 node(s)
id=51 @192.168.168.151 (mysql-5.6.15 ndb-7.3.4)

[mysqld(API)] 3 node(s)
id=61 (not connected, accepting connect from 192.168.168.151)
id=63 (not connected, accepting connect from 192.168.168.152)
id=65 (not connected, accepting connect from any host)


===============================

From the log,
[root@SQL-Arbiter 51]# tail -100 ndb_51_cluster.log

2015-02-24 16:55:09 [MgmtSrvr] INFO -- Node 1: Data usage is 0%(0 32K pages of total 22400)
2015-02-24 16:55:09 [MgmtSrvr] INFO -- Node 1: Index usage is 0%(0 8K pages of total 22432)
2015-02-24 16:55:09 [MgmtSrvr] WARNING -- Failed to allocate nodeid for API at 192.168.168.152. Returned error: 'Id 63 already allocated by another node.'
2015-02-24 16:55:11 [MgmtSrvr] WARNING -- Failed to allocate nodeid for API at 192.168.168.151. Returned error: 'Id 61 already allocated by another node.'
2015-02-24 16:55:11 [MgmtSrvr] WARNING -- Failed to allocate nodeid for API at 192.168.168.152. Returned error: 'Id 63 already allocated by another node.'
2015-02-24 16:55:13 [MgmtSrvr] WARNING -- Failed to allocate nodeid for API at 192.168.168.151. Returned error: 'Id 61 already allocated by another node.'
2015-02-24 16:55:14 [MgmtSrvr] WARNING -- Failed to allocate nodeid for API at 192.168.168.152. Returned error: 'Id 63 already allocated by another node.'
2015-02-24 16:55:15 [MgmtSrvr] WARNING -- Failed to allocate nodeid for API at 192.168.168.151. Returned error: 'Id 61 already allocated by another node.'
2015-02-24 16:55:16 [MgmtSrvr] WARNING -- Failed to allocate nodeid for API at 192.168.168.152. Returned error: 'Id 63 already allocated by another node.'
2015-02-24 16:55:17 [MgmtSrvr] WARNING -- Failed to allocate nodeid for API at 192.168.168.151. Returned error: 'Id 61 already allocated by another node.'
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How Many Licenses/subscription I will be required? (2 replies)

February 24, 2015, 2:05 pm
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I am new to MySQL Cluster and I am estimating a budget/cost for running a basic MySQL Cluster CGE setup.

I am planning to do following setup:
2 data nodes
2 sql nodes
2 management nodes

So my question is that how many subscriptions/licenses I have to buy? Do I need to buy license/subscription for each node separately? Or if I buy one subscription, it would include one data node, one management node and one sql node?

Please reply urgent.

Thanks in advance for anticipation.

Regards,
Omer Khan
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Some questions - MySQL Cluster (no replies)

February 26, 2015, 5:33 am
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Hello everyone.
I created a new topic differentiate my two machinations.

I have currently implemented this with MySQL Cluster:

- 2 data nodes (Windows 7)
191.168.2.251
191.168.2.252
- 2 SQL nodes (API) - (Windows Server 2008)
191.168.2.2
191.168.2.3
- 2 Managers node (Windows Server 2008)
191.168.2.2
191.168.2.3

The cluster appears to work correctly, if a PC is dead, we always access to data, if the DATA down, you can still also.

Now I'd like to do two things, and therefore these are my questions:
- The users / programmers need access to MySQL course, however, I would like to ensure it only uses ONE IP and not the two APIs (invisible to them). How can I do?
- For now, to access MySQL, they use "phpMyAdmin" I like to know if there is something else that allows for MySQL Cluster? If possible with phpMyAdmin, do you know how?
- When my two DATA nodes is down, when I write on the other, it does not update when the UP DOWN returns. Is this normal? Can we do something about it?

Well, I hope you could help me, and I apologize for my English.

Best Regards,
Original.
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NDB memory and disk usage (no replies)

February 26, 2015, 12:20 pm
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I have an NDB database with a single table and a simple use pattern of very frequent reads and updates of individual rows i.e. no complex joins, aggregates etc. The table is ~200M rows but the operations are mostly limited to 10% of the rows at any time, or in other words the set of these “active” rows is about 10% of the total number of rows at any given time. The content of the 10% slowly (and unpredictably) changes, where slowly means hours.

NDB memory usage for this database is ~100GB per data node as reported by “all report memory usage”

I want to continue using NDB but reduce its memory usage by taking advantage of the fact that the actual active data set is only 10% of the total data set.
Is this doable and if so how?

Another way of saying all the above is that I’d like NDB to cache in memory only a subset of the data but cannot see a way to do it.

Thanks in advance for any suggestions.
Tom
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