I'm using mysql cluster, and I was knew mysql cluster auto sharding data on data node (when I use engine= ndb ) and my question is how can I show data on data node machine when my database was sharding
You can view the data on each node through the MySQL Server attached to the cluster
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I have a RDS Mysql database instance on AWS with 1000 tables (lets call it root instance).
I need to create another instance of this database with only the rows that match some foreign key id. This new instance must be in mirror with the root instance so I can query the new values as soon as they get inserted. Question: Is there any way to achieve this with AWS tools? Or do I need to code id?
As far as I know, I can create instances in a cluster to be mirrored with the root instance, but these instances are a full copy and I need only some rows.
Neither AWS nor MySQL provide a solution for what you describe.
You would have to develop your own solution. For example a CDC (change data capture) client (Debezium is a popular open-source CDC implementation) to parse the binary logs of your RDS instance, filter for the rows you want, and insert them to the other instance.
This isn't possible with RDS.
You can "fake it" by converting the tables you don't want replicated to Engine=Blackhole, however you have to edit your parameter-group and set "read-only" to 0, instead of the default "{TrueIfReplica}".
and to handle your case you can create a view that pulls only these records
Alternately, you would need to run your own slave server on EC2 with the RDS server as the master (this is possible if you're running MySQL 5.6 on RDS, but not 5.5 or below), however it's extremely complicated to set up.
In our project we are planning to introduce MySQL NDB cluster to have 99% uptime for our multiple applications dependent on MySQL.
So MySQL is being deployed in two machines. In both the machines Data Node, Management Server and SQL node is deployed and configured to form a cluster as shown in the below snippet.
Based on my understanding replication of data will be done for the data stored in Data Nodes. But can we restrict the replication only to a set of tables or database?
Reason for this query is, there are two applications that are dependent on MySQL, where only one application needs this replication and the other doesn't need this feature because it should connect to a standalone instance of MySQL to store it's local data which shouldn't be replicated as it would cause problem to the application running in another machine.
Please share your thoughts on this.
Though we have deployed MySQL NDB Cluster, the mysqld still supports INNODB storage type. So in order to achieve the above requested need, we created tables explicitly with Storage Engine by mentioning in CREATE TABLE statement like below. This overrode the storage configuration mentioned in my.cnf.
CREATE TABLE IF NOT EXISTS `CDS` (
`CD_ID` bigint(20) NOT NULL,
PRIMARY KEY (`CD_ID`)
) ENGINE=innodb
I have two tables named user and user_posts.These two tables are in different amazone rds instance. I wants to join these two tables. Is it possible to write mysql join using laravel framework?
Thanks in advance!
This isn't possible with RDS.
MySQL has a FEDERATED storage engine that allows one server to access tables on another server, but it is disabled in RDS for MySQL.
The Federated Storage Engine is currently not supported by Amazon RDS for MySQL.
— http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/CHAP_MySQL.html
Clarificarion:
When using the FEDERATED storage engine to allow tables with data on one server to appear to exist on another server -- thus allowing the data to be queried from a server that does not actually have a persistent copy of the data -- only the server that does not have the actual data needs to actually support the FEDERATED engine.
This means that while an RDS instance can't access the data from another server using FEDERATED, a non-RDS MySQL server can access data on an RDS instance using a FEDERATED table configured on the non-RDS server, with the table configured to retrieve data from RDS.
This is because -- from the perspective of the server with the actual data -- the connection from the server using FEDERATED looks like an ordinary client connection. The data is retrieved using normal queries, so FEDERATED support does not need to be available on that side of the link.
This means that a non-RDS server running MySQL can access the data on one or more RDS servers, using FEDERATED tables.
I use this routinely for generating reports that join tables on two (and in one case, three) different RDS instances.
FEDERATED tables do have limitations -- they appear to the server that is fetching the remote data as being very similar to MyISAM tables, in the sense that they do not support transacrions and any query that would result in a full table scan will actually fetch the entire remote table for each query, which can obvioisly get out of hand... so they have to be used with diligence and discretion.
This may not be useful for the scenario described, since it would require the addition of a third server, but it is a solution that is not completely ruled out when RDS makes up a portion of the database infrastructure. The information above is also true when using RDS/MariaDB and RDS/Aurora for MySQL.
I have 5 different schemas, eventually I want to separate them into different servers for specific RAM and CPU assignment depending on the load.
How can I configure so I can show a schema from a different server into a "front" mysql server?
MySQL Proxy:
The MySQL Proxy is an application that communicates over the network using the MySQL network protocol and provides communication between one or more MySQL servers and one or more MySQL clients.
However, note:
Warning
MySQL Proxy is currently an Alpha release and should not be used within production environments.
The FEDERATED Storage Engine:
The FEDERATED storage engine lets you access data from a remote MySQL database without using replication or cluster technology. Querying a local FEDERATED table automatically pulls the data from the remote (federated) tables. No data is stored on the local tables.
Replication:
Replication enables data from one MySQL database server (the master) to be replicated to one or more MySQL database servers (the slaves).
However, note:
In this environment, all writes and updates must take place on the master server. Reads, however, may take place on one or more slaves.
I have problem with my database. I using mysql cluster to operate it. Mysql cluster has 1 management node and 3 data & SQL nodes. The databases is load balanced by haproxy and there 2 load balancers is failovered by keepalived. Here list of IPs:
192.168.1.11: virtual ip for failover
192.168.1.12: load balancer master
192.168.1.13: load balancer backup
192.168.1.14: data & SQL node 1
192.168.1.15: data & SQL node 2
192.168.1.16: data & SQL node 3
192.168.1.17: management node
The problem is when web server(php webpage) connect to database through 192.168.1.11 or direct to database ex: 192.168.1.14 data is stored and when check with heidiSQL data is stored too in database, but the problem come when I shutdown or restart database server and when start it again data that already stored in database is missing. I don't know what the problem is, so what I must to do? Thank's for your attention guys :D
All databases normally don't autocommit your data.
Your data is stored temporarily,and normally afterwards,only after your data is COMMITTED,does your database actually make the changes.
SQL would require you to type the keyword COMMIT.