I have developed an application win QT which uses SQLIte database. The copy of database is located on each site.
On one site let's say site 'BOB1' it works perfectly without any problem. But when we try to use it on another site lets say 'BOB2' it takes long time to open a database connection(approx 2000 milliseconds).
I thought that perhaps there is a network problem, So they tried to use the server of the site 'BOB1' as their server, which works fine. But when i tried to use the server of the site 'BOB2' from the site 'BOB1', I have the same problem. So i thought it may not be the network issue.
Another thing that came to my mind was that, perhaps there is a problem of DNS resolution. But when i tried to ping the server using IP and hostname, the response time is the same.
Any idea or pointer that what can be the problem.
PS: Server + database file path is specified in the setDatabasePath() fuinction using enviornment variables.
Consider copying the database to the local machine (eg temp folder if transient, or other suitable location if permanent). You can safely use either file copy, or consider using the qt backup API to ensure that the transfer happens successfully (plus you get the option of progress feedback)
https://sqlite.org/backup.html
You could even "backup" the file from the remote server to in-memory if the file is small and you say you're reading only?
You can see some sample code here on how to import an sqlite DB into a Qt QSqlDatabase. Note that when you do this, you want to make sure the version of sqlite native API that you're using is the same as that compiled into Qt, or you may get error messages from sqlite or Qt.
Related
Where are the Azerothcore Server databases saved once the server is live with characters and changes etc.
I made several versions of the azerothcore folder as I was troubling shooting various modules and each location seems to be tied to the same server databases?
I would like to back up my server and also delete the extra folders.
thanks
AzerothCore uses a MySQL/MariaDB database server, containing 3 databases:
acore_world for the world objects (quests, NPCs, etc..) you probably don't want to backup this (instead you should back up your own custom SQL scripts if any, not the entire world)
acore_characters and acore_auth respectively, everything related to the characters and accounts, you do want to have regular backups of them
There are plenty of ways to backup your MySQL/MariaDB database(s) and you can find plenty of tutorials online about how to do it (it's a generic thing, not strictly related to AzerothCore).
You can try this tool as well, which creates backup and automatically sends them to you via Telegram: https://github.com/azerothcore/telegram-automated-db-backup
I ended up using MySQL Workbench to export the acore_auth and acore_characters separately as self contained sql files, then re-importing them upon server rebuild.
I Working on Qt where i need to insert data generated from Qt into the mysql database through php script. I am developing one Android Application so I have found this way only to insert data into mysql server through php?
I look forward for yours replies I'll be very thankful if help me out of this problem.
more than 2 weeks i am trying to this.
Thanks!!
There are a few ways you can do this. If your Android app is only for you or a small group of people, you could connect directly to the MySQL database on your server using the QSql library.
However, that won't scale well and it isn't best practice to have direct database connection on an open network.
An alternative way is to use HTTP Post commands to your server where a php script will be able to unpack the information contained within the POST data. Once the PHP script has unpacked the information it can then insert it into the MySQL database on the same server or a different one.
It would be advisable to encrypt the data before sending from your app and decrypting the data in you php script, especially if commercially or personally sensitive data is being transferred.
The following stack overflow questions may help you with creating HTTP POSTs:
How can I create a HTTP POST request with Qt 4.6.1?
Qt Simple Post Request
Most of the people do struggle in qt c++ programming while to go error "Driver not loaded". To fix this problem just install mysql and go to programme files and open msql folder. then go to bin and copy a file written "libmySQL.dll" and paste it in the bin of qt bin folder, the problem will be solved if you still got a problem i will sent you my Qt creator 5.7Tutorial. Thankx, I hope this will work for you
I have a simple Wordpress website that is created using twelve twenty. I need to transfer it from server to my PC to be able to edit it and transfer it back to server. Now that I copied wordpress directory from server to my PC it asks me to reinstall it. How can I do it? Am I missing something? Is it possible to work on website locally and once it is done transger it to the server?
Reason for doing this are:
-don't want to loss data for wrong doing things.
-have a copy of website on local machine.
-easier to work on the local machine offline rather than bing online and accssing the server.
From my point of view , i would suggest u to back-up full website and database from server [every hosting control panels has option to backup same]
Connect via ftp and edit ur files.. there to make lots of changes when u want to move from local to server or server to local.
cheers!!!
Editing the files on a live site directly is a terrible, terrible idea. It invites any number of points of failure. If you're actively developing a site things will break at some point - it's part of the developing process - and you definitely want to break things locally, not on a live site.
There's actually several steps involved, all of which are too long to go into great detail, but here's an overview of what is required along with a few links to get you started. The first time you do it seems laborious, but once you figure it all out it actually only takes 10 minutes.
Firstly you will need a local environment MySQL and PHP environment to install it. As you're on PC look at WAMP; here's a fairly good tutorial on installing it.
If you have a lot of content on the live site you might want to import it into your local environment; you'll need to export the database (probably using PHPMyAdmin) and then import it into your local database. You will need to update a couple of database options so that it points towards your localhost. It's basically the reverse of the process detailed here: you'll be changing your-site.com to localhost:8888. If your site is relatively simple you could skip this stage*
Now you should be able to update your local copy of wp-config.php with the database connect details for your local database (usually it's just localhost for the host name and root for the user and password`). With that in place you should now be able to install WP.
Now that it's installed you can edit away to your heart's content on your local copy, safe in the knowledge that anything you do on your local copy doesn't affect your live copy. When you're ready to push your changes live you can use FTP to copy your local files to your live environment.
* For a lot of projects I don't actually go to the trouble of synching databases - if there's a live site that the client can change the content on it often becomes a futile exercise attempting to synch a database with a moving target. In those instances I'll just use a comprehensive set of test content that contains every conceivable type of content that could possible inserted in to the live site.
your going to love working on your project from your locally. Here's an article I found on wpmudev http://premium.wpmudev.org/blog/how-to-install-wordpress-locally-for-pcwindows-with-xampp/ which gives you a step by step guide for PC / Windows.
I am currently using Komodo edit for coding, and have a set up where I am using MAMP and a local install of Drupal, and SASS to build my site offline.
Once its ready test online, I upload onto the remote site. However, then I am working sometimes on the remote site and sometimes on the local one, and finding some problems.
I'm not using SASS on the remote site, so I am working in the CSS file. I don't have all the Drupal panels in code yet, so I'm having to rebuild them on the remote site, and I'm making tweaks and changes on the fly.
I end up with two slightly different versions of the site and need to keep track of the changes I want to keep from both. What can I do to clean up my workflow?
It would be better if I could work entirely locally and then sync that to the remote environment.
With something like Netbeans I think I could have a local copy of the site running and then right click and upload each file onto the remote server so there are two copies of the file.
I could do with some advice as to what the cleanest set up is.
I have an actual Dev server with its own ip and a live server with its own ip but they both connect to the same mysql server. There are two databases set up, db1 and db2.
I use a php script with basic sql instructions to:
Check which db is in use.
Backup that db (say, db1).
Sync the databases
Import that db into db2.
Once that is done, I use this:
cp webdb2.settings.php settings.php
So I always have two databases available and can roll right back (in this case with:
cp webdb1.settings.php settings.php) if something when wrong.
This seems to be a pretty good system. I only ever work on the dev, and then push it to the live with the process above.
The best thing that you can do is work offline an then sync the content (themes/modules) when you have to.
If you work on both you could lose data or lose track of code changes.
I just started a new position replacing a developer who left abruptly working on a project that is based in the Kentico CMS. I am completely unfamiliar with ASP and Kentico, so the answer here needs to be tailored for a total beginner. I am familiar with other languages (PHP, Ruby, SQL, etc.) but have no idea where to begin with this.
So, want I am wanting to do is copy everything from our production site (db and all) to my local machine so I can develop on it easier. I have already exported the db into an SQL file, and copied all the files in our Kentico Instance folder into github, and cloned it on my local machine. I assume since Kentico is already "setup," going through the installation process in their documentation is not the way to go about this.
Any help would be incredibly appreciated!
David, basically there are a few "pieces" to running Kentico locally. Since, as you mentioned, Kentico is already set up, you should have an easier go of it.
A database with the necessary Kentico tables (it sound like you
already have this)
The codebase (all of the code files that you copied to github)
A valid license for any domain you want to run Kentico on. Was the site already public facing? Do you know what licenses you have
or can you log into the CMS Desk on the site that you copied
everything from?
Set up IIS for your local website. If you are unsure on this one I can explain further, but basically you need to add a new site,
point it to the root code folder for your site, and set the domain
to be a domain you have a Kentico license key for. You'll also need
to change the app pool settings to "integrated" mode (most likely)
and also set the appropriate version of .NET (if it's a recent
version of Kentico you'll want .NET 4.0)
Next you'll need to edit your hosts file to add the domain and point it to your localhost IP address. So add a line like "127.0.0.1
dev.yourdomain.com" or the equivalent.
Edit the web.config file so that your code can connect to your database. You will need to edit the connection string accordingly to
point to the database on your machine.
Once you have done these steps, your site should start to run just as it had before. I didn't give great detail on all of these pieces so let me know what problems you encounter so I can further clarify. More information about the current situation would also help.
One other note I would make: if you need the client to be able to review your work, it will most likely be more efficient and easier for you to leave the original database on the web server, and (if possible) connect to it remotely from your local machine. Since almost any change you make will result in a database change in Kentico, I find it much easier to be working on 1 database for development with distributed codebases. Otherwise you will probably need to overwrite the other database with your changes constantly and this can be annoying. If you leave the database on the server and just connect remotely, you can just ftp (or use git) to push files to the server that you have edited locally.