MySQL Cluster : MySQL's Distributed Database

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MySQL Cluster online backup vs mysqldump. Automatization of cluster backups

There is some special kind of backups in MySQL Cluster: online backup It creates copies of data at Data Nodes. If I understand correctly this is backup of all data that can be stored at Data Nodes, ...
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270 views

Does MariaDB-Galera Cluster support LAST_INSERT_ID and mysql_info?

As far as I understand, Galera does not support table locking, but what information can be retrieved about the last query? LOCK/UNLOCK TABLES cannot be supported in master-master replication. Lock ...
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348 views

All four data nodes in MySQL Cluster in same node group

I am testing MySQL Cluster 7.2. I have two servers, mysql1 and mysql2. I want the management server and two data nodes to run on mysql1 and two other data nodes to run on mysql2. My config.ini file ...
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MySQL Cluster performance variables? [closed]

I will setup MySQL Cluster with 3 nodes (one MGMT node and two Data & SQL nodes) so I'm looking for the best way to manage this. I want to know if there are some variables to consider such as ...
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292 views

mysql cluster table full error

I installed a new mysql cluster on windows (for evaluation). I created a table using command below. After I insert just over 1 million records into the table it gives me the "table datadump is full" ...
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371 views

Mysql cluster fast inserts but slow selects

I have a mysql cluster with 3 Data Nodes and one SQL node. Curently I have 1million 1kb records. The inserts are very fast, takes only a few ms. But the selects are very slow >20s. All machines are ...
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320 views

How to removing or reduce the size of redo logs in MySQL cluster

Can anybody tell me that how can we reduce the redo log file size or can we remove the redo log file size in MySQL Cluster and also what will be the impact of it on performance of cluster.Also can we ...
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MySQL Cluster lock wait timeout exceeded when trying to deal with huge amount of queries

I'm trying to deal with many connections and sometime I get following error: ERROR : Lock wait timeout exceeded; try restarting transaction The bigger number of queries the least number of ...
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29 views

MySQL cluster replication: Slave cluster should not store any data except data replicated from master cluster?

I am researching MySQL cluster replication. I read a section "We assume that the slave server or cluster is dedicated to replication of the master, and that no other data is being stored on it" in ...
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57 views

MySQL cluster: Failover between data node

Today, I do some expirements for understanding MySQL cluster better. MySQL cluster works fine: ndb_mgm> show Connected to Management Server at: localhost:1186 Cluster Configuration ...
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MySQL Cluster work well but ndb_desc doesn't work

I have deployed and configured MySQL cluster. It works fine. ndb_mgm> show Connected to Management Server at: localhost:1186 Cluster Configuration [ndbd(NDB)]2 node(s) id=2@192.168.56.2 ...
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32 views

MySQL replication issue when master gets restarted

I have the following environment: NodeA and NodeB in NDB cluster. NodeC InnoDB outside cluster. NodeB is replication master and NodeC is slave. I have set up replication and it works fine. The ...
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Problem with MySQL Cluster in practice

I am researching MySQL cluster. For the purpose, I do a demo with 4 virtual machines. I have some problems in practice. Topology My topology contains four nodes Node 1: management node, ip address ...
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MySQL Cluster MaxNoOfConcurrentOperations and RAM

Why increasing of MaxNoOfConcurrentOperations lead to higher consumption of RAM? I need high value for fast filling tables with some random data, but i noticed that my datanodes are swapping at ...
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45 views

MySQL Cluster ndb_desc and parttions

I have mysql cluster with two datanodes and noofreplicas=2. According to documentation there must be 1 nodegroup, 2 partitions and 4 parts at all (2 primary and 2 backup). I have a table with 1000000 ...
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What is the preferred mode of replication for a MySQL Cluster?

Reading about MySQL Cluster, I'd like to know about what are the preferred models of replication. I understand that it supports asynchronous replication out of the box, but I'm not sure of how it ...
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145 views

MySQL cluster DataMemory and DiskPageBufferMemory parameters

I want to setup a MySQL cluster. The amount of data is more than double the amount of RAM. I have 3 Data Nodes each with 8GB RAM. QUESTIONS What is a good rule for the DataMemory and ...
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MySQL Cluster Datafile Sizing and Information_schema files tables

I'm trying to migrate a system to MySQL Cluster which holds space around 30GB while it's originally stored in single mysql database where the storage engine is InnoDB. I try to write non-indexed ...
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MySQL Cluster management node does not start (node has different checksum)

Please help me to start data management node. I have installed cluster with autoinstaller and it was working. Now i'm trying to change config (i want to change amount of DataMemory) and run cluster. I ...
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Cluster with shared storage

I actually use MariaDB Galera Cluster with 3 master nods. Workload is about 70% read, 30% write and it's very important to have consistent data with every select - this is why I choose Galera ...
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MySQL distributed database with mysql access to each node

I have task to implement particular database structure: Multiple mysql servers with data using the same schema. Each server can see and edit only his particular part of data. And One master server ...
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86 views

MySQL cluster concurrency

I have a little application that executes select queries against a MySQL cluster. By using 1 thread to read a record the latency is x. By using 2 threads to read records concurrently the avg latency ...
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198 views

What does “WSREP Aborter Idle” mean in a MariaDB Galera cluster?

I've tried to Google WSREP Aborter Idle but there are literally 3 results. Does anyone know what this means? Should I be concerned that the these processes have been opened for so long or is this ...
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How Many Nodes For MySQL Cluster Setup?

I quit not fully understand how exactly MySQL Cluster does to bring faster queries and faster databases operations. I have 1 MGM cluster (management cluster) 1 MySQL API cluser (mysqld) 2 ...
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Altering NOT NULL column in offline table

Regarding the MySQL Cluster documentation we are not allowed to modify a column to NOT NULL on ONLINE tables. i.e. ALTER TABLEfoo_barMODIFY COLUMNbazdecimal(11,8) NOT NULL Our hosting provider tells ...
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Upgrade 2 servers with master-master replication without data loss

We have two MySQL servers running with master-master replication in a Pacemaker cluster. If a database operation should be done, the primary server is asked first to do the job, if it fails, the ...
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Why there is a start (*) after Nodegroup:0 in MySQL cluster? What does it means?

I am new to MySQL and MySQL cluster setup. However going through several blogs and Web links I've finally able to manage the cluster up and running. I have 1 management, 1 SQL and 3 data nodes ...
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MySQL Cluster Installation

I am very new to mysql-cluster.I downloaded the binaries and was trying to configure it on my local machine. Can anybody suggest how to install it on single machine with the 1 management node,2 data ...
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47 views

Disk page size for MySQL and MySQL cluster [closed]

As I know database reads data from disk in some constant page size (even if one byte is needed, whole page will be copied from disk to memory). What are disk page sizes for MySQL and MySQL Cluster? Is ...
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47 views

Why so much traffic between SQL Node and Data Node?

For a MySQL cluster I use one SQL Node and two DataNodes. On one Data Node I have started the linux command tcpdump and have observed the communication between the SQL and Data Node while I have ...
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Maximum number of records in MySQl NDB

I have a MySQL cluster table that consist of 1 primary key int (32) and 10 varchars of size 100. I use disk data tables. I have three data nodes with together 22GB RAM. How many records can I store ...
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80 views

MySQL cluster performance very poor on Amazon

We have currently a project running where we need to store 1 to 20,30 million 500B to 2kB records. We need to use MySQL cluster on 4 EC2 instances (8GB Ram, 2 cores) and ephemeral storage (Records ...
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MySQL cluster with RAID0

I use several EC2 (M1.LARGE) instances with ephemeral storage. Would RAID0 improve write and read performance? I'am only interested in performance. Has someone experience? Is the speedup=2??
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What is a mysqld process in a MySQL cluster?

As I know, a mysqld process is a kind of a router of a MySQl cluster. It directs requests to the right ndbd node. Assuming I have 3 ndbd nodes on 3 different machines and I don't use replication. How ...
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Approximation of table size for MySQL cluster

I want to make some approximation of table size for MySQL cluster. Please read my reasoning and tell me, if I am right or am I making mistake somewhere. I have simple table with PK (int) and ...
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MySQL Cluster - Got error 1601 'Out extents, tablespace full' from NDB

I am trying to do some tests on MySQL Cluster. I am creating my database using following commands: CREATE DATABASE test1; use test1; CREATE LOGFILE GROUP lg1 ADD UNDOFILE 'undofile.dat' ENGINE = NDB; ...
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681 views

MySQL cluster 5.6 doesn't convert invalid TIMESTAMP value to '0000-00-00 00:00:00'?

According to the document: Invalid DATE, DATETIME, or TIMESTAMP values are converted to the “zero” value of the appropriate type ('0000-00-00' or '0000-00-00 00:00:00'). but it doesn't ...
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94 views

MySQL Cluster - strange syntax error

I have MySQL Cluster instance and want one column (BLOB) to be stored on disk instead of memory. I tried to follow this tutorial: ...
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Cannot start MySQL cluster with single node

For some testing I have installed MySQL Cluster. I can get it to work with configuration suggested in Lunix guick start guide. My configuration: [ndb_mgmd] hostname=localhost ...
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Can Mysql Cluster AQL(Push-Down Join) be trigger with sharding table at the same time?

From the jonas slide, I knew that the feature of "Push-Down Join" can make join 70x faster. the most important factor is to eliminate the round trip between API node and data nodes. where all data in ...
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Delete operation mysql cluster

I am trying to delete some entries from table on a cluster and I get this error ERROR 1297 (HY000): Got temporary error 233 'Out of operation records in transaction coordinator (increase ...
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954 views

MySQL Cluster - Table is full [Error 1114] while still creating tables

I am trying to forward engineer a MySQL Workbench model with about 100 tables to a development single-node cluster and, while creating the 51th table, I end up getting a "1114 table is full" error, ...
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141 views

Windows Service Management Node Won't Start

I'm trying to set up a basic Cluster on my Win7 PC for testing. But I am stuck at the first hurdle. I have installed the Management Node as a Service: ...
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59 views

Load balancing MySQL ndbcluster

I have successfully setup ndbcluster version 7.1.26. This contains 2 data nodes[NDBD], 2 mysql [MYSQLD] nodes and one management [MGMD] node. Replication works successfully. My Web application is ...
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192 views

Redo Logs Mysql Cluster

The mysql cluster has 4 directories namely D8 D9 D10 D11 for redo logfiles. But while inserting into table only one redo directory is used. I ran following command to get redo information "all dump ...
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Error in alter table reorganize partition for MySQL Cluster

My cluster contains 48 million rows and cluster contains 4 storage nodes . After that I add online storage node and executed alter table 'customer_tbl' reorganize partition. Some parameters of ...
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116 views

Data usage increases initially when reorganize partition mysql cluster

In my MySQL cluster, the data usage of 4 data nodes is approximately 77%. I added a new data node online, and attempted to reorganize partition to redistribute data among all data nodes. But before ...
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MySql Cluster for educational use

I am student and I am writing Master of Science paper about in-memory databases. I want to use MySql Cluster for benchmarks in my work. Can I use MySql Cluster free of charge for educational purposes ...
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Where can I learn about MySQL master/slave, master/master, or clustering setups?

What are the best resources you've read or watched about setting up master/slave or clustering for database replication? I don't know much about this. I have a database that is getting rather large ...
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MySQL licensing

I have looked at a few questions posted in stackoverflow http://stackoverflow.com/questions/225987/can-someone-explain-mysqls-license-and-what-it-means-to-closed-source-developme ...