General :: Mysql Replication Fails After Reading Large Table?
Oct 15, 2010
My MySQL replication slave failed,while reading a large size table from master.Thhe information from error.logError 'Unknown table engine 'InnoDB'' on query. Default database: 'test'. Query: I am sure that table is a Big size table..
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Sep 12, 2010
i had configured a MySQl Replication Server with 2 DB Servers.Now we are planning to implement a failover Scenario.If Master fails The slave should act as a Master and we have a addition server.It will be going to act as slve.i had mentioned the points below..
Replication
(Master Server)----->----(Slave Server)-----------(Additional Server)
DBS 1 DBS 2 DBS 3
1.Replication is made between Master (DBS 1) and Slave (DBS 2) (successfully done)
2.If Master (DBS 1) failed Slave (DBS 2) should act as a Master and Additional Server (DBS 3) needs to be Slave
3.Whenever Orginal Master (DBS 1) became online the current Master ie ..Slave (DBS 2) should go back to Slave position and all lost data will be replicated to Master DBS 1.
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Sep 15, 2010
I had Configured a MySQL Master-Slave replication.It seems that the binary logs steals so much space of My storage.
i.)My Master
show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000144 | 475823 | | |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
ii.)My Slave.
mysql> SHOW SLAVE STATUSG;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.277.55.141
[code]....
If i remove all binary files up tp mysql-bin.000144 using "PURGE",will it affect my existing database/any data loss.
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May 3, 2010
Kmail 1.13.2 Problem on startup, error is from nepomuk, data storage. "cannot find Redland backend, nepomuk is disabled until fixed. Also see the following error from the akonadi console:
100503 10:00:15 [Note] Plugin 'ndbcluster' is disabled.
100503 10:00:15 InnoDB: Started; log sequence number 0 31413862
100503 10:00:15 [Warning] Can't open and lock time zone table: Table
'mysql.time_zone_leap_second' doesn't exist trying to live without
[code]....
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Apr 5, 2010
If I have 2 MySQL server and I want to replicate their database to only 1 server, is it possible? I cannot afford to have master-to-master only because I still need to replicate one more machine but I do not have anymore more machine for replication so I'm thinking if these 2 MySQL server can be replicate to only 1 machine. If this is not possible, I guess I've no choice but to have two mysql daemon on that machine
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Sep 27, 2010
Might this is silly question but I am not much familiar to database.I am doing master slave Mysql replication for load balancing. On master server different database has different user privileges. I create backup using mysqldump command and restore on slave server instead of using load data from master; command.When i replicate database from master to slave will i require to set user privileges same as master ?One more question: How to lock all database in mysql?
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Aug 8, 2011
I have two computers (one tower, one laptop). On both the computers, I have apache & PHP & mysql running, so i can program/script anywhere I like. With a simple sync'ing program, the PHP scripts are synced between the PC's, thought the databases arent. Therefor I'm looking for a method to sync (replicate) the databases between the PC's. thought after setting up some configuration, i'm stuck... now with how to, but what to
Option 1) Multi-master replication between the PC and the laptop. With this setup, the database can ONLY sync once both the devices are turned on. Also it can only sync if they are turned on on my LAN, since they do not have an external static IP address. if I turn on both PC's on my LAN, with static IP's (from the DHCP server), this option will work. Thought, I basically never have both pc's turned on in my own home... cuz i can use only one at the time anyway.So I was thinking of another setup
Option 2) Multi-master replication with: online Server, PC and Laptop. The server basically contains the most up to date database. for example, the laptop updates the server and the server can update the PC later, once the PC is turned on. Also the other way around, the PC can update the server which can than update the Laptop.
There is, if i'm correct, only one problem: the only multi master replications setups I found, use a circulair setup... (1 updates 2, 2 updates 3, 3 updates 1) What I need is to have the PC update the server, but ALSO have the server update the PC (same for the laptop)
than there is another (little) problem: the PC and laptop cannot be reached from behind the modem, nor do they have a static IP. My question: Is it possible to sync the server with the laptop (that has no static IP), the laptop with the server (that has a static IP), and the same for the PC
PC <====> Server <====> Laptop
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Jun 21, 2010
I am looking into setting up replication in a production environment but currently this is on two test machines. I am following the documentation at [URL] but I am unable to get past "16.1.1.10 Setting the Master Configuration on the Slave". When I do the CHANGE MASTER TO I am getting a syntax error for some reason. What am I doing wrong? These servers run "CentOS release 5.5 (Final)" and "MySQL 5.0.77-log Source distribution" installed via yum. The only changes from default are that I created a single database on the master before doing the table lock and dump, then everything else has been done exactly to what the documentation states, but is still failing.
The option skip-networking is not in the config file on either server and neither one runs SELinux or any firewall.
mysql> CHANGE MASTER TO
-> MASTER_HOST='192.168.1.220'
-> MASTER_USER='repl'
-> MASTER_PASSWORD='removed'
[Code]....
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Aug 2, 2010
I'm trying to setup wordpress on my server, which of course I need mysql for. I setup a database the other day, which worked perfectly, but I had to start again as I put some information in wrong. Now, I can create a database fine, but when I run
Code:
GRANT ALL ON wordpress.* TO wordpress@localhost IDENTIFIED BY "password";
I get the output:
[code]...
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Aug 12, 2010
I started over combining the first parts of this guide: [URL]..ubuntu8.04 (Only the first few parts in terms of configuration and naming). Then I used this guide: [URL]..Surprisingly enough all steps worked.
1. Now I need to set up LAMP servers with MySQL master/slave replication and Apache rsync.
2. Next i need to add BIND to both my Load Balancers with master/slave backup and replication...
Are there any guides to look at to follow on these? Can tou point me to the right direction for BIND with replication.
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Aug 6, 2009
After untaring a mysql file (very large) I'm trying to find where the file listed below has gone. I did a search on the file name:
fine / -name 'mysql-qui-tools-5.0' -print
But can't find the file.
-rwxr-xr-x root/root 9651820 2007-05-02 11:46:01 mysql-gui-tools-5.0/mysql-query-browser-bin
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Mar 13, 2011
I'm currently running a membership site which is Joomla-based. Basically I need a bash script to constantly check that MySQL users table and copy those credentials into my SSH users list (subsequently giving them SSH access).I've looked at pam_mysql, but that merely is for authentication, it doesnt add them to the SSH users.
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Apr 1, 2011
I ran testdick on a apple hard drive to find the tables. It looks like it found it, here's the log:
Quote:
Tue Mar 29 12:02:56 2011
Command line: TestDisk
TestDisk 6.11, Data Recovery Utility, April 2009
Christophe GRENIER <grenier@cgsecurity.org>
[Code]....
How do I restore the table using fdisk? Gparted doesn't let me check the drive. It just says unallocated space, create a table and erase all data.
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Nov 23, 2010
I think I found a bug with the maverick installer. [URL]. The installer is incorrectly reading my partition table I'm afraid it might overwrite data. /dev/sda3 is the target for the install.
/dev/sda1 = 200M = Windows system partition
/dev/sda2 = 239G = Windows install
/dev/sda3 = 50G = Where I want to install Linux
/dev/sda4 = 45G = NTFS storage
At first I had /dev/sda3 as a RAW type. In fact the only way I could create ext4 is via mkfs. I did unmount them before proceeding - mounted just as a reference in the screenshot. fdisk reads the same thing. Fresh install from LiveCD. I only have Wipe entire disk or Advanced in the installer. I don't have the "Install along side another OS" option.
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Mar 4, 2010
I've installed MySQL-server-community-5.1.35-0.rhel5.x86_64.rpm, client and devel on my 64 bit server having CentOS 5.4 (Final) as operating system. Now when I setup my.cnf file and add an entry "init-file=/usr/src/script.sql" and restart Mysql service then Mysql fails to start but when I comment init-file portion in my.cnf file then mysql runs fine. Please find below log file entry in mysql log
100304 3:03:38 [ERROR] /usr/sbin/mysqld: File '/usr/src/scripts/startup.sql' not found (Errcode: 13)
100304 3:03:38 [ERROR] Aborting
I have verified that file exist on the location mentioned in my.cnf file. Can anybody please suggest fix of this problem.
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Aug 7, 2009
I have 2 servers, 1 running a web server on 1 IP address,the other server running a proxy on a different IP address. I intend to change and update the ncsa file with usernames and passwords from a mysql table.Is there a way to replicate 1 table from the webserver to the proxy server databases and then run a cronjob? The cron will simply delete unused usernames and add new ones.Is there a better way of doing this? I don't want to run the webserver on the proxy server for security and also for performance.
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Sep 23, 2010
I have just run into a baffling error. I have a database set up in MySQL with six tables. My PHP based website performs queries of all kinds on these tables (SELECT, INSERT, UPDATE, DELETE). On my most recently setup table, the "Orders" table, I am able to perform queries from the server, as well as from my PHP MySQL Admin interface, but all activity from my webpage states that the Orders table does not exist. All other tables are running fine. I have tried rewriting the query script, checked for case sensitivity problems, even cut and pasted other working scripts in place, changing the table and field names as needed. No success. What could cause a single table to not show up like this?
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Jun 8, 2011
I am trying to install some program: rosinfo: - Create mysql database for rosinfo - Create table hosts, locks. Use file docs/rosinfo.sqlAnd I need to create table hosts, locks, using file rosinfo.sql. I have that file, but dont know what to do with it.
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Jul 13, 2011
I've started a webserver at 127.0.0.1:**** I want to be able to use a database for this server. Which schema do I use to add a new table to? Do I create a new Schema altogether?
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Oct 17, 2010
A sed mishap prior to a database import left me with a table name with, eh, well, this: Code: mysql> show tables;
+-------------------+
| Tables_in_someday |
+-------------------+
| day20101016 |
| day20101017); |
+-------------------+
I've corrected the sed mishap and imported the database the way it was intended Code: mysql> show tables;
+-------------------+
| Tables_in_someday |
+-------------------+
| day20101016 |
| day20101017); |
| day20101017 |
+-------------------+
But I can't seem to drop the table day20101017); because no matter how I seem to escape it it errors.
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Jul 6, 2009
When a user logs into my webmail application, it creates entries in a table on MySQL called "identities" which works great however once the user is deleted fro Linux with the "userdel -r" command, the data still sits in MySQL. My question is how I can I remove the table data from old users? It appears as show below:
[code].....
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Feb 24, 2009
What is the use of UNION=() in CREATE TABLE?
Code:
ENGINE=MRG_MyISAM DEFAULT CHARSET=utf8 UNION=();
I have been given some code and could not explain why it's err's out. Checked the mysql 5.0 manual but nothing[URL]. It only explains using UNION in a SELECT statement which I understand. If I drop off UNION=() then CREATE TABLE works fine.
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Feb 18, 2010
I have tried a few packages but cannot find an easy intuitive interface for editing tables in a mySQL database. I just need to simply edit the table field data, import and export multiple rows, and filter the table data so only the rows are returned based on a string that I search for. The tables I edit have several thousand rows and some up to 30,000. I do not know how to write queries and it seems all these packages require that you know how to write sql queries to do what I need to do. On the mac I used Sequel Pro, which is dead easy to use and is mostly point and click to do all the above. Since my mySQL experience is very limited, I really need something simple like this.
I have tried:
MySQL Workbench
Navicat (lite version)
MySQL Query Browser
how to do what I need to do with the above packages.
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Mar 12, 2011
I would like to store JPG files in a mysql database table. I figured that using BLOB fields on the one hand and the 'load_file' command on the other would do the trick. Here is how I set up the table:
mysql> create table blobtable (id int(10) not null auto_increment,
fileName varchar(15) not null,
file longblob not null, primary key(id) );
Query OK, 0 rows affected (0.51 sec)
Then I tried to enter the data:
mysql> insert into blobtable(filename,file)values('pic',load_file('/var/www/temp/IMGP4764.JPG'));
Which got me the following error signal:
ERROR 1048 (23000): Column 'file' cannot be null
It seems to me that the file path to the JPG file (although correct) is the source of the problem, and is causing the load_file command not to work. My first attempt was with the JPG file in my PC's home directory. When that returned the same error message, I figured that maybe the file had to be in the PC's (server's) web area so I put it under the 'www' directory.
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Jan 26, 2011
We have a MyISAM table without .MYD and .MYI files for storing data and index but we can select data from the table. We can't use mysqlhotcopy for backup the table. Each time,we execute mysqlhotcopy, we have the following error: 'dbs.table: is not base table'. How do we repair the table to re-create .MYD and .MYI files?
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Nov 16, 2010
we had a CENTOS 5.5 x86_64 machine with 8ered with MySQL 5.0.91-community.Currently we had a very high number of Created_tmp_disk_tables (31k in 4,5 hours!!!).I've read suggestion that we need to increase tmp_table_size, and we've set tmp_table_size to 64M, but this drupal modul's query still cause mysql create tmp table on disk
Code:
SELECT DISTINCT node.nid AS nid,
comments.subject AS comments_subject,
[code]...
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Jun 26, 2011
I want to insert a acess log file to mysql table.
my log file look like this;
08/Apr/2011 10:51:19 http://v4.netlogstatic.com/v6.00/385...t.messenger.js
08/Apr/2011 10:51:19 http://download.windowsupdate.com/ms...536945da07.exe
08/Apr/2011 10:51:19 http://www.google.lk/search?
08/Apr/2011 10:51:19 http://clients1.google.lk/generate_204
[Code].....
i want to insert this in to a table which having datetime (as it is in log file) and the site visited.
I created a mysql table using DATE using the date type and the TIME suing time type.but once i loaded this log to table date field shows empty. like following.
| 0000-00-00 | 04:18:29 | http://www.espncricinfo.com/navigati...scorecard.css?
how can I solve this problem.your responses are highly. My table should look like the following
| 08/Apr/2011 | 10:51:19 | http://www.radioeksen.com/song.txt
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Jul 31, 2010
Making a low-pace instance of Conky on my server, running once a minute and without X-output. and then every minute it inserts a row in a MySQL table with some variables. Once it is in a MySQL database I can make a nice PHP-application showing some graphs and statistics or maybe even send a mail when the motherboard is catching fire or so
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Sep 21, 2009
How do you guys to do just that? I know the option for global logging, with parameters --log on service run or log-bin and err-log for inside my.cnf. But what i am looking for is a way to log specifically a table activity, any activity, be it select or update queries.
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Dec 1, 2008
I am writing a script to mine data from my game server logs which are going to mysql. My first question is syslog-ng is sticking $msg into one colum it self, $msg tends to be a long string here are a few examples:
cn name team frag death flags role host.
0 Maik CLA 2 0 0 normal *.70.233.118.
1 lizardncd RVSF -1 3 0 normal
[*.22.247.40] lizardncd fragged Maik.
And they are not always in the same format, How could I parse this data to do something useful, like creating a user stats page with frag counts and flag counts. Should I create a script that runs in a cronjob that parses this data to a new table maybe once a day. Even then the $msg string value is random and I am thinking in terms of awk.
Second. I would like to keep track of what ip's are using what nicknames. Kinda in the sense of and ip associated to a array of names that have been used on that ip address so I can keep track of users. How would this work logically with a mysql db, could a column allow multiple values, then loadable into an array, which then can add, remove, and store to mysql.
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