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Replication :: Innodb (master) --replication --> Myisam (slave)


I want to ask whether I can do replication in the following case.

innodb (master) --replication --> myisam (slave).




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Master Slave Replication Working But Slave Log Name Stuck?
I have been checking SHOW SLAVE STATUS; and keeping an eye on it. It lags but seems to be still going. However. Today I notice that the Master_Log_File changed from

domain-bin.000001 to domain-bin.000002
and the
Read_Master_Log_Pos from a really high 6 dig number to a low number, but the Relay_Log_File didnt change. it still says

slavedomain-relay-bin.000001 and a really large growing number for: Relay_Log_Pos

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Replication From Master To Slave
I'm having quite a fuss with my two MySQL DB servers lately. I'm trying to establish replication between a MySQL 4.0.20 server (master) and a MySQL 4.1.11 server (slave).

From what I read, replication from a 4.0.x server -> 4.1.x server will work, just not the other way around.

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Master Slave Replication
I am setting up a Master/Slave system so that the data will always be backup up safely when any changes are done.

Now - I am not sure to what extent the replication extends to. I know it is fine for Data but what about these scenario's

1. Master table structure changes - are these replicated
2. Trigger/Stored Procedure added or changes - are these replicated
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Replication Master & Slave On The Same Machine
I have set up a master and a slave according to the manual. The master runs 4.0.12 and the slave runs 4.0.14, they are both actually on the same machine (it's a long story, but it's what I need). I did LOAD DATA FROM MASTER on the slave which completed successfully, and then I tried SLAVE START:

ERROR 1200: The server is not configured as slave, fix in config file or with CHANGE MASTER TO

but.. it is! on the slave: Code:

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Master/slave Replication Error
I have set up master/slave replication between 2 servers (1 master,
1 slave). However, when I change a table on the master (e.g.
by inserting a row), the same table on the slave is not updated.
The strange thing is that if I enter SHOW SLAVE STATUS on the client,
it gives me the same offset in the binary log on the master as the
master gives when issuing SHOW MASTER STATUS (both entered after the update).

Code:

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Replication Of Few Tables From Master To Slave
I'm replicating just a few tables from the master to the slave.

Sometimes the slave stops with the following error :
"Error 'Table 'xxx' doesn't exist' on query.

That table only exists on the master, and I don't want it on the slave.

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Master/slave Setup To Do Replication
using mysql 4.1.7, have a master/slave setup to do replication.

Is there anyway to prevent the slavedb from accepting inserts other than the replication inserts?

If rows do get inserted directly into the slave, there is an error because the two databases no longer match. Is there anyway to recover from this?

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Replication :: Switching Master And Slave On Failure
I have 2 servers, A and B. A is the primary server and master in mysql.

B is the redundant server and the slave in mysql. A is replicating to B. Now A fails and B becomes the primary server (still slave in mysql?). A finally comes back up, but instead of switch primary status from B back to A, A becomes the redundant server and B stays as primary. Now, I need B to be master in mysql and A to be slave in mysql.

I don't know if this can be done the way it needs to. If it can I really don't need a step by step process unless someone is really willing to give that to me. I just would like to know if this can be or has been done.

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Replication :: Understanding Master & Slave Servers
Can anyone share their experience with replication? In particular I'm wondering how fast (or how slow?) replication occurs. Could I pull off the configuration below?

For example, if a person places an order on our site, the update is sent to the master server. Can that update be replicated to the slaves before the browser is taken to a reciept page (which is queried against the slaves)?

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Replication 2 Sever Master & 1 Server Slave
i want to make replication database with 2 server master dan 1 server slave, any body help me how setting or configuration in mysql.

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MyISAM On Master And InnoDB On Slave Server
Is this possible to have a MyISAM table on master server and change its storage engine (to InnoDB) on slave server in a replication environment?

If this is possible, what should I consider before changing MyISAM to InnoDB on slave server?

Here is the table structure:

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Replication :: Slave Thread: Error Connecting To Master: Access Denied For User
I have MySQL 3.23.41 on a RH-7.2 Linux used as local server. I'm trying to replicate the databases from server (192.168.0.1) to another linux PC (192.168.0.3).

Following the manual, i grant to the master a user with file privileges, and edit both my.cnf files. The master starts fine but the slave mysql.log shows up an error:

Slave thread: error connecting to master: Access denied for user:
replica@localhost' (Using password: YES) (0), retry in 60 sec

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Replication, Slave Thread: Error Connecting To Master: Access Denied For User:
I have MySQL 3.23.41 on a RH-7.2 Linux used as local server. I'm trying to replicate the databases from server (192.168.0.1) to another linux PC (192.168.0.3).

Following the manual, i grant to the master a user with file privileges, and
edit both my.cnf files. The master starts fine but the slave mysql.log shows up an error:

Slave thread: error connecting to master: Access denied for user:
replica@localhost' (Using password: YES) (0), retry in 60 sec

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Replication Between InnoDB And MyISAM
I have a database table that warehouses text documents. It is frequently being inserted into, but is also frequently being searched (I use a FULLTEXT index). However, searches are sometimes extremely slow due to the table locking on INSERTs.

I have heard that people sometimes use an InnoDB table as a "buffer" table--they insert into the InnoDB table (which supports row locking) and then replicate that data INTO the MyISAM tamble (which supports FULLTEXT) in such a way that table locking is avoided/minimized/optimized, so the SELECTs still come back quickly.

So basically my question is: how do I set up a routine to replicate data from an InnoDB table into a MyISAM table in such a way that I minimize the table-locking that slows down the SELECTs and full text queries on the MyISAM table?

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Master Master Replication, Truncate Table Fails, Version 5.0.22
I have set up a master master replication link between two databases, prototyping an idea. Anyhow, adding records and deleting works, both get updated, creating and dropping tables works, but truncating tables doesn't work.

My main questions are, why doesn't truncate work, and if it doesn't work, what else doesn't work across a master-master replication link?

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Backing Up A Circular Master-master Replication Setup
I have a running circular master - master replication running.

I want to run a mysqldump on one of the servers but am worried what the impact of running a mysqldump will be on the replication.

Will the transactions generated by the mysqldump get put into the binary log file?

I see the option --delete-master-logs for mysqldump and am assuming that it deletes the previously inserted log items from the binary log file.

If there is someone that can please just give me a little more clarification on how the --delete-master-logs option works.

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Can't Set-up Slave In Replication
I'm trying to set-up replication following a book and on-line guide. This
is over SSH with a tunnel (not sure if the tunnel's required).

The master appears to be set-up OK (easy enough).
The slave however isn't behaving.

I've got a my.cnf with the following:

[mysqld]
master-host=127.0.0.1
master-port=APORT
master-user=AUSER
master-password=APASSWORD
server-id=2

When I start the slave up and do show slave status - I get 0's and
blank entries back.

I've tried setting it up using:

CHANGE MASTER TO
MASTER_HOST='localhost',
MASTER_USER='AUSER',
MASTER_PORT=APORT,
MASTER_PASSWORD='APASSWORD',
MASTER_LOG_FILE='AFILE-bin.001',
MASTER_CONNECT_RETRY=10;

This sets up the slave bits and show slave status looks much better,
however,

SLAVE START;

returns...

The server is not configured as slave, fix in config file or with CHANGE
MASTER TO

I can only seem to find this message in pages that have a list of all Mysql
errors.

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NOW() At Replication Slave
We have 3 MySQL servers in replication, 1 master and 2 slaves. One slave server is 300 seconds behind the master due to heavy SELECT statements.

If I run INSERT query (containing NOW()) on master at 10:00 AM, what time will be saved in the slave server which is 300 seconds behind? The query is

MySQL Code:

INSERT INTO users (username, password, signup_date_time) VALUES ('user1', 'pass1', NOW())

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Replication Slave Error
030710 22:36:43 Slave: connected to master 'repl@217.58.xxx.yyy:3306',
replication started in log 'webserver-bin.054' at position 73
030710 22:38:53 Error reading packet from server: (server_errno=0)
030710 22:38:53 Slave thread killed while reading event
030710 22:38:53 Slave thread exiting, replication stopped in log 'webserver-bin.054' at position 1120
030710 22:38:58 Slave: connected to master 'repl@217.58.xxx.yyy:3306',
replication started in log 'webserver-bin.054' at position 1120
I've tried to do also
Reset master
On the master before lock tables without result.

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Replication: 2 Masters And 1 Slave
I need to replicate 2 databases (each one resides in a different
server) to a single slave server. Reading the documentation I have
running the master/slave replication, but i need to replicate the
other database too, the problem is: I need replicate the other
database and that database exists in the other server, so how I
configure the other master server/datatabase in the slave?

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Replication - START SLAVE
When I try to start the slave for replication

I get a sytax error:

START SLAVE;

not much should be able to go wrong when you're typing in two words.

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Replication Is Stopped On Slave
using replication on mysql-4.1(Master) to mysql-4.1(Slave). Suppose Master DB inserting queries in binary log file at master-bin.01 at position 100.

And on slave somehow replication is stopped.
mysql-slave> show slave statusG

Master_Host: master-ip-address
Master_Log_File: master-bin.01
Relay_Log_File: slave-relay.01
Slave_IO_Running: No
Slave_SQL_Running: No
Read_Master_Log_Pos: 100
Exec_Master__Log_Pos: 50

After fixing slave problem when i run following command

mysql> START SLAVE;

starts Slave IO_THREAD and Slave SQL_THREAD. Because slave io_thread started that's why new relay log file created slave-relay.02 and slave io_thread resumes to log queries after position 100 (Read_Master_Log_Pos: 100) to new relay file slave-relay.02 file like position 101,102 .... onwards.

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Master / Master Asynchronous Replication
Currently we have a web based application that is mostly reads (4:1
r/w). It is using a single MySQL database server. Is there any way to
have two database servers in a master/master configuration such that
writes to either database server are replicated to eachother. Basically
even though we have a 4:1 ration of read/write the writes happen often
enought that when the database goes down the app stops working. I know
how to get this working in Oracle (insert big laugh here) but Oracle is
cost prohibitive. Any pointers?

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Master/Master Replication Problems
I was wondering whether someone could help me.

I have inherited set of replicated servers from a guy I used to work with, basic set up is:

Master1/Slave2 - Server ID 1
Master2/Slave1 - Server ID 2

When I looked at the logs it looks as though Server ID 2 is well out of step. Having looked at the slave status it appears that that Slave_SQL_Running state is set to No and a particular piece of SQL is causing the problem. Having ran the SQL on the particular server it has now problem at all.

Now my understanding of this type of set up is that Server ID 1 writes directly to Server ID 2, then Server ID 1 is in turn replicated to.

But for the life in me, I cannot understand why this piece of SQL is causing the problem. Can anyone offer me any ideas on how I can best get to the bottom of this, I'm really struggling with this. There was me thinking replication just worked!

Is there an ability to get MySQL to log all queries it is running, so I can get to the bottom of all queries currently being executed?

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Replication Database On Slave Is Not Updated
We are using mysql v4.0.24 on Linux machines.

I'm trying to set up replication with a master and only one slave
database.

The syncronization seems to work well, the relay file on slave is wrote
correctly (Read_Master_Log_Pos and Relay_Log_Pos are updated) but the
information on slave database is not updated.

Master and slave are sincronyzed as shown below but for some reason I
don't understand. I have to say thay sometimes the replication worked but sometimes
setting up a new slave or changing a slave to master it does not. Code:

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Single Slave Replication From Three Masters
Is it possible, and what are the ramifications, of having a single slave replicate from three masters? I have six machines, three real servers with three replicating. Be nice to free up two machines and have just a single 'slave'.

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Replication :: New Database Won't Copy To Slave?
I am confused about MySQL replication. I had someone set it up for me on my server and it works for what is already there. If I add a new database to the master db it doesn't seem to carry over to the slave. Is Replication for the entire MySQL server or is it database specific?I keep reading the manual and it looks server specific but I'm not getting new dbs over on the slave. Do I need to restart the slave?

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Replication From 2 Master
I am running MySQL V4.0.14 with replication. I want to replicate specified databases from 2 different masters into one slave. Is this possible?

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Mast-Master Replication
I am unable to find any information about master-master replication. I need to replicate 1 mysql server over to other as a standby master server.

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Dual-master Replication
I would like to set up a dual-master replication setup for my MySQL
database
(running on RedHat 9). Could someone please point me to appropriate
website that details this setup process and management as well (i.e.
what should I do if one of the masters goes down?).

Also, are there any solutions that allow auto-increment fields in this
kind of setup?

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Replication :: Run RESET MASTER
If I run RESET MASTER on the primary MySQL server (the master) will it wait till the slaves are up to date before deleting the bin files or do you think my slaves will get screwed up?

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Replication Master Crashed After 6 Hours
I recently setup replication, the master and slaves appears to work
fine initially. After about 6 hours, the master mysqld process will
start to consume 99% CPU and the load (avg. load per minute) will go
to 3, 4, 6, 15, 24, 56, 312... in a matter of seconds! The master then
stops responding and needs a reboot. This problem is reproducible, I
have tested a few times.

This is a screenshot of "top" command just before the master died:
http://choonkeng.hopto.org/temp/replication-hang.gif

There are plenty of memory and no disk swapping when the master goes
99%. Error and slow logs don't show any useful information.

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Master Replication Automatic Failover
I am having one master and three slaves. If my master fails suddenly then one of my slave has to become master automatically on any platform (windows/linux). Can you please suggest the process to do this.

Note: Manually i know how to do this task, but i need to be do this automatic.

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Multi-Master Cross OS Replication
I normally run two Linux MySQL servers in multi-master replication and it has worked fine. Now I have had one of the machines die on me. The problem is that I want to now have that same replication configuration between my Linux and Windows machine which both run MySQL.

The configuration on the linux machine I don't really have trouble with at all, but editing the my.ini file on windows to setup the master host causes the service to fail to start. So my question is what is the appropriate configuration of my.ini on windows to facilitate multi-master replication?

Many hours of googling produced limited results/tutorials, none of which were helpful (most of which were for Linux which again I am familiar with already).

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Muti Master Server Replication
I need some help in setting up multi master server replication
setup fpr my project. Till now I have set up single master replication, but had not been able to manage anythin on mulitimaster setup.

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Dual Master Replication In MySQL 4.1
I have been charged with the task of setting up dual master replication with our company's MySQL servers. I know that their are inherent auto_increment problems with this set up, and the mechanisms to fix this problem weren't introduced until version 5.0.

Can anyone give me some tips, pointers, or advice for safely setting up this replication topology in 4.1? Are there any steps I can take to make sure there are no auto_increment issues? Has anyone had experience setting this up?

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Replication With Master And Several Slaves/Masters
At the company I'm working (a road survey centre) where about to start a new project.

We're planning to create web-based application with php, javascript, maybe we're going to use AJAX but certainly combined with a MySQL database to store all of the data.

Since users/researchers have to be able to work off-line on a laptop. Our idea was to install, via XAMPP or something like that, the complete package (i.e. Apache, PHP, MySQL) on each laptop. On a main server we have the same but probably a Linux system.

Now, I know it is possible to replicate the DB on the laptops with the main DB. But is it also possible to update/replicate the main DB with results from the/a laptop after working a day off-line? So it becomes available on each laptop after they done a replication from the main DB?

Maybe a long post for a small question, but I wanted to draw the "context" in wich it is going to be used. A question you are about going to ask me probably is: "why they have to be able to work off-line?" Quite simple: Not everywhere in the world you have wireless internet access + the onsite laptops need to communicate on site with serial devices GPS, Gyroscope, and such like. Wich is for a webbased application running on a server thousand miles rather difficult...




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Replication :: Error Connecting To Master
Show master status on the master looks fine. When I start mysql on the slave, here's what I get:

071017 10:20:35 [Note] Slave SQL thread initialized, starting replication in log 'binary-log.000006' at position 3031, relay log './web1-relay-bin.000003' position: 98
071017 10:23:44 [ERROR] Slave I/O thread: error connecting to master 'replication@myotherserver': Error: 'Lost connection to MySQL server during query' errno: 2013 retry-time: 60 retries: 86400

Master my.cnf:
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock

old_passwords=1

log-bin=/var/db/repl/binary-log

binlog-do-db=mydatabase
binlog-ignore-db=abunchofotherdatabases

server-id=1

[mysql.server]
user=mysql
#basedir=/var/lib

[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

Slave My.cnf:
[mysqld]...........................

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Replication :: Master Log File Position Changed
I have a simple master/slave replication environment that is working smoothly with one exception. If I restart the master server the Master Log File is incremented by one (e.g. the original master log is named data-bin.000001 and the new master log is named data-bin.000002) the slave server never notices that the Master Log File and the Master Log Position have changed. Instead, the slave sits there waiting for new entries in the old Master Log File. I can tell this by executing a SHOW SLAVE STATUS on the slave server.

I am not sure about this because I can't find any documentation on the proper behavior of mysql during this scenario, however, I am under the impression that slave server should be able to figure this out and continue replicating, without requiring me to execute an "CHANGE MASTER..." command on the slave server every time the master is restarted. Of course, I assume this same problem will occur when the Master Log File grows to its maximum size and a new Master Log File is
created.

If anybody who has experience with mysql replication could just confirm that the behavior I am seeing is not correct, that would be great. Or if anybody has any suggestions as to what, if anything, is wrong with my setup. Code:

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Replication :: Show Master Status Return Empty Set
I am trying to set up replication on 2 servers. I am following the procedure on mysql.com.
After you have done the grant replication and the snapshot, you have to do SHOW MASTER STATUS; and it is suppose to return informations. But for me, it returns "empty set".

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MySQL MYISAM Multimaster Replication And Backup
I was wondering if anyone could point me in the right direction on backing up a Multimaster replicated system.

I have two redhat linux machines with MySQL 5.0.24 max with a working multimaster database that will eventually grow to around 50Gig (2Gig at present). I need an automated fast way to backup this setup. at present I am manually doing the following (not sure if it is the right thing to do):

1. flush tables with read lock;
2. shell> tar zcf xxxx.tar.gz /datadirectory
3. show master status; (record repl cordinates)
4. unlock tables;

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Replication And InnoDB
I'd like to setup the following:

Server A <-- Server B <-- Server C
Data A some of Data A some of Data A
Data B Data B

Server A should be the master for server B. Server B should get not
all but some of the data of server A. Additionally there should be
other data stored on server B. Server B is slave for server A and
master for server C. Server C simply should get all the data of server
B.

No problem with MyISAM, but with InnoDB some questions arise:

The manual says, that one should shut down the master and copy the
InnoDB datafiles, logs and .frm files.

1.) If I only need some data of server A on server B wouldn't it be
overkill to copy all the InnoDB data?

2.) If I want to store other data on server B I can't mix up the
InnoDB datafiles and logs for data A and B, can I?

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Innodb, And Replication Issues
Im complety new to mysql and have the following questions about it :

1) what is innodb and innodb tables ? ( I know it enables the Db to be transactional but thats about it)
2) what are the advantages of using innodb tables ?
3) Are there any issues with Innodb tables and replication ?
4) and is replication widly used in mysql -is it stable or are there any pitfalls that could be avoided ?
5) how can i tell if a database is using innodb tables ?

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Corrupted InnoDB - Restoring Via Replication?
We have a master/slave setup and on our slave the InnoDB was recently corrupted on the slave. The MyISAM tables seem to be OK.

I would like to, if possible restore these DBs via replication from the master.

I moved the old corrupted ibdata1, along with ib_logfile0/1 out of the way.

On the slave, do I need to do something with the log-bin and relay-bin, to make sure that the slave knows it is completely out of date on those tables?

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MySQL Master/Slave
In the case of 2 3.23.X series mysql databases in a master/slave
replication setup (myiasm tables), if a FLUSH TABLES WITH READ LOCK is
put on the slave, does the master effectively lock too because it is
waiting for the binlog update(s) to be confirmed from the slave, or
does the master merrily carry on not caring in the least that the
slave tables are locked?

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Master/Slave Restoration
I have 2 servers (A and B) setup as Master and Slave respectively. Upon A's failure, all client's request will be directed to B.

How can I set A to become master again after its been restored from its failure? In chapter 4.10 of mysql docs, it mentioned (vaguely) that A will become B's slave to sync all operations that had happened after the failure. Finally, upon full sync switch A to become Master again and B to slave.

How can I setup A to be a slave of B? The problem I faced is that I can't find out what the bin log and position is from B since "show master status" is always empty. I guess B still thinks its a slave.

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Different Errors On Master And Slave.
Replication stopped on slave servers when I executed the below query, and this query failed on master.

mysql> UPDATE members set col1 = 1000, col2 = 10 where type = 2;
ERROR 1030 (HY000): Got error 127 from storage engine
Here is the error message on when I do SHOW SLAVE STATUSG

Last_Errno: 0
Last_Error: Query caused different errors on master and slave. Error on master:
'Got error %d from storage engine' (1030), Error on slave: 'no error' (0). Default
database: 'subscribers'. Query: 'UPDATE members set col1 = 1000, col2 = 10 where type = 2'
members table contains 1485112 rows.

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Procedures To Promote Slave To Master Server
What is the proper procedure for promoting a Slave into a Master
replication server?

We want to do some fail-over testing. When we tried this in the past, the
former master would not replicate. We got an error: "master and slave
have equal MySQL server ids".

The fail-over procedure includes renaming the slave and exchanging IP
addresses with the master server. We did not change the server-ids.

I haven't found any information on promoting slaves to master servers.

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