How it is possible to update localhost MySql database with server mysql database at particular interval. Web application is made in PHP and database should be in MySql.
Suppose I have a Database at Hosting site Now i want to update my database at regular interval with Local Host Database at my Local Computer.Please suggest me ??
Sounds like you need to use MySQL's replication feature. Here's a walkthrough and here's the manual for reference.
It's worth noting that replication over the internet (rather than a local network) can be slow and you can end up with a slave that's minutes, even hours behind a busy master. Another option could be to periodically mysqldump the master database and copy it back to your local machine, although if your master is very busy you'll lock databases and hang queries, and if it's very large this process will take a long time.
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I am developing a web application in CodeIgniter and MySQL.
I need to set up a function to update data in MySQL in my local server when there is no internet connection and later switch to live server when the connections are available, restore the locally saved data into live database as well.
(There may be clients 1) at remote location who have poor internet connectivity which I need this idea for and 2) the other who can add data directly to the live server).
Is there any mechanism to get this done?
Mysql Database Replication
Replication enables data from one MySQL database server (the master) to be replicated to one or more MySQL database servers (the slaves). Replication is asynchronous - slaves need not be connected permanently to receive updates from the master. This means that updates can occur over long-distance connections and even over temporary or intermittent connections such as a dial-up service. Depending on the configuration, you can replicate all databases, selected databases, or even selected tables within a database.
I have a simple MySQL database (one table with 12 rows of data and 5 columns) sitting on the web-server of my host provider.
On my home PC I create the data programmatically and store it in a free version of SQL Server (on my home PC). I would like to "upload" this data to the MySQL db in real time (or as close as I can get) over the internet (I'm assuming this is the only way to connect the pipes).
I know that opening up a MySQL database to a remote internet connection probably is not a "secure" thing to do, but the resulting data table will be publicly available anyway via an "app" so I'm not too worried about that (I suppose a hacker could "overwrite" my data with their own if they were both industrious and inclined) but I think the risk/reward is so small its not a major concern.
Anyway, what is the easiest way to do this with some semblance of security? I only know how to program in VB (I did a little HTML and ASP back in the day, but that was a long time ago). I could learn a few lines of code in another language if need be.
I do not have a static IP, and I've never actually interacted with a MySQL database before (only SQL server, so my MySQL knowledge/ familiarity is zero...but a db is a db, so how hard can it be?). Because of my home network firewall, I can't allow connections "in". I will have to make the connection to the MySQL db "out" from my home PC --> to the hosted database.
Ok this problem is not actually super simple.
What you will find is most shared hosting providers do not allow just any IP to access their databases.
Solution? set the IP for your computer of course! BUT.....you are probably on home internet connection so your IP address can CHANGE (if you have a static IP you are a lucky person!)
So the best way - create a mini-API!
Basically, you want to post your data to a script (with some security of course) that then inserts this data into the database.
It is a lot of work but having done all this before it seems to be the only way unless you have a dedicated server / advanced access privileges!
You could take a look at WAMP for your home pc. It's simple to use.
And then you should take a look at Mysql remote connections(some details here)
I would try this:
At your local computer install MySQL server, there's a free community
edition available for download, try the web installer since its more lightweight. Use the
custom installation and make sure MySql Workbench is selected too.
Workbench has a migration tool for the most common databases, Try this locally, so you can tell if all your data is correctly migrated from your local SQL Server to a MySQL db and there are no data losses in the process.
Then, You could probably connect through Workbench to your online MySQL db
and migrate your data to it directly from your just created local db. In case you cannot connect, make a backup of your local db and send the files to
your server by ftp or similar process. Then, simply restore DB from the backup file on your
online server.
Hope this helps!
I am creating a software for my client in PHP and MySql, The software will be running in the local network, the software should also run in online that is all the data should be viewed online, i would like to know is there a way to update the mysql database from local to online whenever the internet is connected, if the internet is not connected all the data will be stored in local mysql server. they wont be adding any data in the online server and they will only view the contents. Kindly help me in this
It sounds like you are looking for a way to have a read-only, "online" (assuming WAN) MySQL server which is updated from a read-write, "offline" (LAN) MySQL Server which is updated by your users.
If that's the case, you may want to consider a Master/Slave MySQL Replication configuration:
http://www.rackspace.com/knowledge_center/article/mysql-replication-masterslave
you can run a cron job in your local server which monitor and upload data to online server when internet is available. You need to track (set a status) which data is uploaded which not for synchronization
Setup replication between your mysql databases. The local network database would be the slave and the web server would be the master.
See http://dev.mysql.com/doc/refman/5.5/en/replication-howto.html for setting up replication.
I would suggest you setup master/slave replication.
I would make the local server the master and the internet server the slave.
However, if you are using a common shared hosting service, I am not too sure if you have permission to setup such DB replication structure.
Tryhttps://www.digitalocean.com/community/articles/how-to-set-up-master-slave-replication-in-mysql. However, with the mysql versions pre 5.6 (I think) you can't delay the replication from a predefined interval. However, http://alexalexander.blogspot.com/2013/03/mysql-slave-delay-how-to.html suggests using something called a percona tool kit. I haven't used it though.
I am planning to increase My site performance by adding another MySQL server beside the current one because the current server is too busy.
Is it possible to scale PHP application with MySQL replication without PHP code change? I means all quires will be sent to the master and the master will distribute the load between itself and the slave.
Is there any easy way to send all write quires to the master and distribute read quires between the master and slave?
I think you need to put a load balancer / proxy between your db servers and clients (your code). Example solutions are:
HAProxy: http://haproxy.1wt.eu/
MySQL Proxy: https://launchpad.net/mysql-proxy
If you don't want to do the "load balancing" manually, you might want to look into MySQL Proxy.
I think you should also optimize your application's code (PHP) and then you should optimize your architecture.
First of all you can check your MYSQL queries. Mysql slow query log can help you. If you have a connection issues (MYSQL server has gone away or too many connections etc) you should manage your application's connection pooling mechanism.
And other steps and also your answer is (I think), you can set up MYSQL master-master replication. When you set replication clearly, you can put a load balancer (HAProxy) front of your replication.
You have 2 nodes for mysql (server A and server B, both of them master server)
You can configure HAProxy with server A is master and server B is backup server. Your all MYSQL operations comes server A via HAProxy and your data is automaticly sync with server B.
When server A is down, HAProxy sends all queries server B automaticly.
Also you can configure HAProxy with server A is all insert queries and server B is for all read queries.
All this cases your code should connect MYSQL via HAProxy
I have a local intranet application which runs off a basic WAMP server in our offices. Every morning, one of our team members manually syncs our internal mysql db with our external mysql db (where our online enrollments occur). If a change is made during the day on the intranet application, it is not reflected on the external db until the following day.
I am wondering if it is possible to (essentially) tunnel to an external mysql connection from say a wamp or xampp server from within our offices and work in 'real-time'.
Anybody had any luck or advice?
Yes
Replication enables data from one MySQL database server (the master) to be replicated to one or more MySQL database servers (the slaves). Replication is asynchronous - slaves need not to connected permanently to receive updates from the master. This means that updates can occur over long-distance connections and even over temporary or intermittent connections such as a dial-up service. Depending on the configuration, you can replicate all databases, selected databases, or even selected tables within a database.
If you use the external server directly, performance is likely to suffer. A Gigabit LAN might be a thousand times faster than your Internet connection - particularly the upload speed of an ADSL connection.
Just make your internal application use the database from the external one. You may need to add permission to the external server to allow connections from your internal server IP, but otherwise this is just like having a webserver and sperate db server that need to access each other.
Can't really tell you how to do this here - it all depends on your specific configuration, something that I would thing is a little complicated (and too specialized) to figure out on SO.