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[Maria-discuss] New Question: Hybrid replication - issue
by AskMonty KB 11 Sep '15

11 Sep '15

Hello, A new question has been asked in "Replication, Cluster, & Multi-Master" by truptimali. Please answer it at http://mariadb.com/kb/en/hybrid-replication-issue/ as the person asking the question may not be subscribed to the mailing list. -------------------------------- Hi, I have been trying to implement a Hybrid replication. There is Async replication configured between two galera clusters. To begin with I have been trying this out on two datacenters dc1 and dc2. dc1 has two node galera cluster -- node1_dc1 , node2_dc1 dc2 has one node - just one primary galera node . node1_dc2 I have configured async replication between node1_dc1 and node1_dc2. But I am facing strange problem here. I could see replication happening nicely on all the three nodes involved. But When i tried to restart node2_dc1 ,(the secondary node from dc1's galera cluster) - i am not able to login to this node's mysql with root user. Or any user for that matter. Upon investigation using skip grant, found that the mysql.user table is emptied. (You can refer to the attached logs of node2_dc1 where I have highlighted removal messages in log). My doubts/concerns - 1) I am not sure what could have triggered this mysql table's removal in first place. 2) Inspite of this - I could get this node join the cluster. (Atleast as per the wsrep_cluster_size attribute on primary node) sharing my configurations on all the three nodes - 1) node1_dc1 (Primary Node) galera_cnf : [mysqld] #mysql settings binlog_format=ROW default-storage-engine=innodb innodb_autoinc_lock_mode=2 query_cache_size=0 query_cache_type=0 bind-address=0.0.0.0 log_slave_updates=1 #galera settings wsrep_provider=/usr/lib/galera/libgalera_smm.so wsrep_cluster_name=london_galera_cluster wsrep_cluster_address=gcomm:// wsrep_sst_method=xtrabackup-v2 wsrep_sst_auth="root:XXX" wsrep_restart_slave=1 # Galera Node Configuration wsrep_node_address="192.168.XXX.YYY" wsrep_node_name="192.168.XXX.YYY" ************************************ wan.cnf: [mysqld] server-id=101 gtid-domain-id=1 binlog-format=ROW log-slave-updates=1 log-bin=binlog wsrep-restart-slave=1 slave-skip-errors=1396 2) node2_dc1 (Secondary node): galera.cnf: [mysqld] #mysql settings binlog_format=ROW default-storage-engine=innodb innodb_autoinc_lock_mode=2 query_cache_size=0 query_cache_type=0 bind-address=0.0.0.0 log_slave_updates=1 #galera settings wsrep_provider=/usr/lib/galera/libgalera_smm.so wsrep_cluster_name=london_galera_cluster wsrep_cluster_address=gcomm://192.168.XXX.YYY,192.168.YYY.ZZ wsrep_sst_method=xtrabackup-v2 wsrep_sst_auth="root:XXX" wsrep_restart_slave=1 # Galera Node Configuration wsrep_node_address="192.168.YYY.ZZ" wsrep_node_name="192.168.YYY.ZZ" wan.cnf: [mysqld] server-id=102 gtid-domain-id=1 binlog-format=ROW log-slave-updates=1 log-bin=binlog wsrep-restart-slave=1 slave-skip-errors=1396 Node1_dc2 - Single node on datacenter-2 : galera.cnf: [mysqld] #mysql settings binlog_format=ROW default-storage-engine=innodb innodb_autoinc_lock_mode=2 query_cache_size=0 query_cache_type=0 bind-address=0.0.0.0 log_slave_updates=1 #galera settings wsrep_provider=/usr/lib/galera/libgalera_smm.so wsrep_cluster_name=calif_galera_cluster wsrep_cluster_address=gcomm:// wsrep_sst_method=xtrabackup-v2 wsrep_sst_auth="root:XXX wsrep_restart_slave=1 # Galera Node Configuration wsrep_node_address="192.168.ZZZ.XXX" wsrep_node_name="192.168.ZZZ.XXX" wan_repl.cnf: [mysqld] server-id=201 gtid-domain-id=1 binlog-format=ROW log-slave-updates=1 log-bin=binlog wsrep-restart-slave=1 slave-skip-errors=1396 ~ Note unique server-ids and common gtid-domain-id. Attaching logs of both the nodes in galera cluster in datacenter 1. lines to look for in node2.txt - file *********** Sep 10 21:06:21 localhost mysqld: 150910 21:06:21 [Note] WSREP: Shifting PRIMARY -> JOINER (TO: 0) Sep 10 21:06:21 localhost mysqld: 150910 21:06:21 [Note] WSREP: Requesting state transfer: success, donor: 0 Sep 10 21:06:22 localhost mysqld: WSREP_SST: [INFO] Proceeding with SST (20150910 21:06:22.394) Sep 10 21:06:22 localhost mysqld: WSREP_SST: [INFO] Cleaning the existing datadir (20150910 21:06:22.400) Sep 10 21:06:22 localhost mysqld: removed ?~@~X/var/lib/mysql/mysql_upgrade_info?~@~Y Sep 10 21:06:22 localhost mysqld: removed ?~@~X/var/lib/mysql/multi-master.info?~@~Y Sep 10 21:06:22 localhost mysqld: removed ?~@~X/var/lib/mysql/mysql/procs_priv.MYI?~@~Y Sep 10 21:06:22 localhost mysqld: removed ?~@~X/var/lib/mysql/mysql/user.MYI?~@~Y ***************** Sep 10 21:25:51 localhost /etc/mysql/debian-start[16787]: Triggering myisam-recover for all MyISAM tables Sep 10 21:25:53 localhost mysqld: 150910 21:25:53 [Note] WSREP: (81dce617, 'tcp://0.0.0.0:4567') turning message relay requesting off Sep 10 21:32:01 localhost mysqld: 150910 21:32:01 [ERROR] Slave SQL: Error 'Can't find any matching row in the user table' on query. Default database: 'mysql'. Query: 'SET PASSWORD FOR 'root'@'localhost'='*FD9D25929BE2AE3A18896D5D93AB9A7DD78D22E4'', Internal MariaDB error code: 1133 Sep 10 21:32:01 localhost mysqld: 150910 21:32:01 [Warning] WSREP: RBR event 1 Query apply warning: 1, 19504 ****************** -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/hybrid-replication-issue/

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[Maria-discuss] New Question: MariaDB Galera bootstrap
by AskMonty KB 10 Sep '15

10 Sep '15

Hello, A new question has been asked in "MariaDB Community" by cisaksen. Please answer it at http://mariadb.com/kb/en/mariadb-galera-bootstrap/ as the person asking the question may not be subscribed to the mailing list. -------------------------------- Are there any references for a MariaDB Galera setup on a systemd system (SUSE 12). Having trouble getting the bootstrap to work. I can get the db to run but it won't connect to the galera provider. Not only that but i have to run /etc/init.d/mysql start --wsrep-new-cluster to get the script to accept the parameter. If I use service or systemctl they both return invalid parameter or option. Another thing is when I do run /etc/init.d/mysql it will start but systemctl status mysql won't know about it. Thnaks -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/mariadb-galera-bootstrap/

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[Maria-discuss] MariaDB 10.1.7 RC now available
by Daniel Bartholomew 09 Sep '15

09 Sep '15

The MariaDB project is pleased to announce the immediate availability of MariaDB 10.1.7. This is the first Release Candidate (RC) release in the MariaDB 10.1 series. See the Release Notes and Changelog for details. - - Links - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - MariaDB 10.1.7 - Release Notes: https://mariadb.com/kb/en/mariadb-1017-release-notes - Changelog: https://mariadb.com/kb/en/mariadb-1017-changelog - Downloads: https://downloads.mariadb.org/mariadb/10.1.7 About MariaDB 10.1: - https://mariadb.com/kb/en/what-is-mariadb-101/ APT and YUM Repository Configuration Generator: - https://downloads.mariadb.org/mariadb/repositories/ - - MariaDB Webinars - - - - - - - - - - - - - - - - - - - - - - - - - There are several upcoming MariaDB-focused webinars and many previously held ones available to watch on an on-demand basis at: - https://mariadb.com/news-events/webinars - - MariaDB Books - - - - - - - - - - - - - - - - - - - - - - - - - - There is an ever-growing library of MariaDB books available to help you get the most out of MariaDB. See the MariaDB Books page for details and links: - https://mariadb.com/kb/en/mariadb/books/ - - User Feedback plugin - - - - - - - - - - - - - - - - - - - - - - - MariaDB includes a User Feedback plugin. This plugin is disabled by default. If enabled, it submits basic, completely anonymous MariaDB usage information. This information is used by the developers to track trends in MariaDB usage to better guide development efforts. If you would like to help make MariaDB better, please add "feedback=ON" to your my.cnf or my.ini file! See http://mariadb.com/kb/en/user-feedback-plugin for more information. - - Quality - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - The project always strives for quality, but in reality, nothing is perfect. Please take time to report any issues you encounter at: - http://mariadb.org/jira - - Support MariaDB - - - - - - - - - - - - - - - - - - - - - - - - - - If you would like to contribute to the MariaDB Foundation, please see the "contributing" and "donations" pages. We also have merchandise available in a cafepress store. All proceeds go to support the MariaDB Foundation. - https://mariadb.com/kb/en/contributing - https://mariadb.org/en/donate/ We hope you enjoy MariaDB! -- MariaDB Website - http://mariadb.org Twitter - http://twitter.com/mariadb Google+ - http://google.com/+mariadb Facebook - http://fb.com/MariaDB.dbms Knowledge Base - http://mariadb.com/kb

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[Maria-discuss] MySQL 5.7 JSON
by Tom Worster 03 Sep '15

03 Sep '15

Are MySQL 5.7 JSON features <http://dev.mysql.com/doc/relnotes/mysql/5.7/en/news-5-7-8.html#mysqld-5-7-8 -json> likely to end up in MariaDB anytime? If so, would it be 10.2? Tom

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[Maria-discuss] New Question: Table replication with xtra column on slave
by AskMonty KB 01 Sep '15

01 Sep '15

Hello, A new question has been asked in "MariaDB Community" by rahularman. Please answer it at http://mariadb.com/kb/en/table-replication-with-xtra-column-on-slave/ as the person asking the question may not be subscribed to the mailing list. -------------------------------- I have one table DailyMetrics on Interim server like below. Mater DB->Secondary DB--> Interim DB Master DB: Table DailyMetrics ( a char,b char Secondary DB: Table DailyMetrics ( a char,b char Interim DB: Table DailyMetrics ( a char,b char, InsertTime timestamp default current_timestamp) Replication is working fine but added column InsertTime on interim DB is storing 000.000.00 00-00-00 value. It is not storing current system timestamp. When I issue separate insert statement on slave side, it is storing system time but nor with replication. Can anyone suggest me how to achieve system timestamp on slave side. Other details as follows: MySQl DB: MariaDB 5.5.23 Replication Type: Row based. Platform: Linux -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/table-replication-with-xtra-column-on-slave/

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[Maria-discuss] New Question: Login Question
by AskMonty KB 31 Aug '15

31 Aug '15

Hello, A new question has been asked in "MariaDB Documentation" by cisaksen. Please answer it at http://mariadb.com/kb/en/login-question/ as the person asking the question may not be subscribed to the mailing list. -------------------------------- I'm trying to log into a remote MairaDB and keep getting Host [IP] is not allowed to connect to this mariadb server. {client side} tried both mysql -p --port=3307 -h [hostname] mysql -p --port=3307 -h [hostname.domain.xxx] {server side} mysql login accounts tried user/root @ %.domain.xxx user/root @ hostname% Both client and server are in DNS and resolvable. What or how does mariadb determine when to use an IP vs hostname with connection security ? -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/login-question/

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[Maria-discuss] Double linked list
by Roberto Spadim 28 Aug '15

28 Aug '15

hi guys, i'm with some doibts... I'm trying to replicate a double linked list, my information is: 1) insert at position xxx (and move others to next position) 2) update position yyyy 3) change position zzz with www 4) delete position xxxx to vvvv 5) return all positions 6) return positions with value > zzz My doubt is... I have only one writer and many many readers, writer can't be blocked for more than 1-3 seconds Some times i need to read history (functions 1 to 6) and recreate the linked list at a point in time List is something like: Position - json structure (arraylist in c#) like 0-[0,1,2,4,5] 1-[2.3,4,8,0] It update very fast, minimal update interval is 0.001second (max of 1000updates per second) for each list I will have 100-2000 lists --- Doubts : 1) Whats the best method to create the current double linked list? (The list positioned at last operatiom) A memory table? A row level lock table? A cache solution (memcached) with only one key-value and value with the full list? 2) considering a table: 2.1)what the best method to change position? Update set position=if() where position in (xxx, yyy) In this case what should be the primary key? If i use positionas primary key in this update i cam have non unique values... 2.2) ehat to do with delete/inserts? Insert+update positions? Delete+update positions? 3) any idea if oqgraph could solve this or if there's a storage engine solving this problem? Thanks guys :) -- Roberto Spadim SPAEmpresarial - Software ERP Eng. Automação e Controle

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[Maria-discuss] random non-zero exit status 1
by Reindl Harald 26 Aug '15

26 Aug '15

on machines mysqld mysqld regulary for backup reasons i observe over months now *randomly* starting mysqld fails because exit-code 1 leading in systemd stop the service and start it again while the is no single indication on the mysqld error-log anybody else? ________________________________________________________________________________ Aug 26 01:45:02 buildserver systemd: Stopping MariaDB Database... Aug 26 01:45:03 buildserver systemd: Stopped MariaDB Database. Aug 26 01:45:10 buildserver systemd: Starting MariaDB Database... Aug 26 01:45:10 buildserver mysqld: 150826 1:45:10 [Note] /usr/libexec/mysqld (mysqld 10.0.21-MariaDB) starting as process 31936 ... Aug 26 01:45:10 buildserver systemd: mysqld.service: control process exited, code=exited status=1 Aug 26 01:45:12 buildserver systemd: Failed to start MariaDB Database. Aug 26 01:45:12 buildserver systemd: Unit mysqld.service entered failed state. Aug 26 01:45:12 buildserver systemd: mysqld.service failed. Aug 26 01:45:13 buildserver systemd: mysqld.service holdoff time over, scheduling restart. Aug 26 01:45:14 buildserver systemd: Stopping MariaDB Database... Aug 26 01:45:14 buildserver systemd: Starting MariaDB Database... Aug 26 01:45:14 buildserver mysqld: 150826 1:45:14 [Note] /usr/libexec/mysqld (mysqld 10.0.21-MariaDB) starting as process 31988 ... Aug 26 01:45:14 buildserver systemd: Started MariaDB Database. ________________________________________________________________________________ 150826 1:45:02 [Note] /usr/libexec/mysqld: Normal shutdown 150826 1:45:02 [Note] Event Scheduler: Purging the queue. 0 events 150826 1:45:02 [Note] InnoDB: FTS optimize thread exiting. 150826 1:45:02 [Note] InnoDB: Starting shutdown... 150826 1:45:03 [Note] InnoDB: Shutdown completed; log sequence number 17271831 150826 1:45:03 [Note] /usr/libexec/mysqld: Shutdown complete 150826 1:45:10 [Note] InnoDB: Using mutexes to ref count buffer pool pages 150826 1:45:10 [Note] InnoDB: The InnoDB memory heap is disabled 150826 1:45:10 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins 150826 1:45:10 [Note] InnoDB: Memory barrier is not used 150826 1:45:10 [Note] InnoDB: Compressed tables use zlib 1.2.8 150826 1:45:10 [Note] InnoDB: Using Linux native AIO 150826 1:45:10 [Note] InnoDB: Using CPU crc32 instructions 150826 1:45:10 [Note] InnoDB: Initializing buffer pool, size = 16.0M 150826 1:45:10 [Note] InnoDB: Completed initialization of buffer pool 150826 1:45:10 [Note] InnoDB: Highest supported file format is Barracuda. 150826 1:45:10 [Note] InnoDB: 128 rollback segment(s) are active. 150826 1:45:10 [Note] InnoDB: Waiting for purge to start 150826 1:45:10 [Note] InnoDB: Percona XtraDB (http://www.percona.com) 5.6.25-73.1 started; log sequence number 17271831 150826 1:45:10 [Note] Plugin 'FEEDBACK' is disabled. 150826 1:45:10 [Note] Server socket created on IP: '127.0.0.1'. 150826 1:45:10 [Note] /usr/libexec/mysqld: Normal shutdown 150826 1:45:10 [Note] Event Scheduler: Loaded 0 events 150826 1:45:10 [Note] /usr/libexec/mysqld: ready for connections. Version: '10.0.21-MariaDB' socket: '/var/lib/mysql/mysql.sock' port: 3306 thelounge 150826 1:45:10 [Note] Event Scheduler: Purging the queue. 0 events 150826 1:45:10 [Note] InnoDB: FTS optimize thread exiting. 150826 1:45:10 [Note] InnoDB: Starting shutdown... 150826 1:45:12 [Note] InnoDB: Shutdown completed; log sequence number 17271841 150826 1:45:12 [Note] /usr/libexec/mysqld: Shutdown complete 150826 1:45:14 [Note] InnoDB: Using mutexes to ref count buffer pool pages 150826 1:45:14 [Note] InnoDB: The InnoDB memory heap is disabled 150826 1:45:14 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins 150826 1:45:14 [Note] InnoDB: Memory barrier is not used 150826 1:45:14 [Note] InnoDB: Compressed tables use zlib 1.2.8 150826 1:45:14 [Note] InnoDB: Using Linux native AIO 150826 1:45:14 [Note] InnoDB: Using CPU crc32 instructions 150826 1:45:14 [Note] InnoDB: Initializing buffer pool, size = 16.0M 150826 1:45:14 [Note] InnoDB: Completed initialization of buffer pool 150826 1:45:14 [Note] InnoDB: Highest supported file format is Barracuda. 150826 1:45:14 [Note] InnoDB: 128 rollback segment(s) are active. 150826 1:45:14 [Note] InnoDB: Waiting for purge to start 150826 1:45:14 [Note] InnoDB: Percona XtraDB (http://www.percona.com) 5.6.25-73.1 started; log sequence number 17271841 150826 1:45:14 [Note] Plugin 'FEEDBACK' is disabled. 150826 1:45:14 [Note] Server socket created on IP: '127.0.0.1'. 150826 1:45:14 [Note] Event Scheduler: Loaded 0 events 150826 1:45:14 [Note] /usr/libexec/mysqld: ready for connections. Version: '10.0.21-MariaDB' socket: '/var/lib/mysql/mysql.sock' port: 3306 thelounge

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[Maria-discuss] New Question: MariaDB 10.1 system variables
by AskMonty KB 26 Aug '15

26 Aug '15

Hello, A new question has been asked in "What is in the Different MariaDB Releases?" by diptijoshi. Please answer it at http://mariadb.com/kb/en/mariadb-101-system-variables/ as the person asking the question may not be subscribed to the mailing list. -------------------------------- What is the difference between MariaDB 10.1 and MySQL 5.6 system variables ? -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/mariadb-101-system-variables/

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[Maria-discuss] New Question: SET Variable statement
by AskMonty KB 24 Aug '15

24 Aug '15

Hello, A new question has been asked in "MariaDB Community" by cisaksen. Please answer it at http://mariadb.com/kb/en/set-variable-statement/ as the person asking the question may not be subscribed to the mailing list. -------------------------------- I'm trying to write a SQL script that creates a database and a few other things. I'm having trouble with a user defined variable statement. SET @dbname = CAST(trees AS VARCHAR(10)); comes directly from https://mariadb.com/kb/en/mariadb/user-defined-variables/ And I keep getting --> Error: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'VARCHAR(10))' at line 1 Running MariaDB 10.0.20 on SLES 12, I have no idea what the problem is ? -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/set-variable-statement/

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