Suggestions for a user notification system in MySql and PHP -

-

I am implementing a notification system and see if these suggestions are valid for setting up, if Better or better solution is available than any other:

An information has been added to the database. A guest / identifiable user logs on or uses the site.

  • Notification table stores notification texts and IDs.
  • Option 1: Alert table stores all users who have read the notification
  • Option 2: Alert table Store all users who have not read the notification

Is these options too much, is it probably better to add 100,000+ alerts and as such, users abandon their information or Interacted with them, change their position Bone or is deleted warning. This can be a very big desk ...

What is a more extensible set up for custom alerts based on user activity?

I will not do it like this, I keep a record (user, notification) for each and I mark each record as unread or unread. When you read it, you can record, which can be important depending on your application (for example, if you need any type of audit).

100k records are not too big Do not worry about size, unless you get at least 10 million records. If necessary, store them at some point. But you should guess somehow how quickly you will make 10 million records. If it is 3 days, then yes, you have a problem. If it is 3 years then you do not.

This option has the notification text in a separate table.

It should also be on a very good scale with a large number of messages. You can select unread messages for a user (indexed) and get notification text (if your table has millions of records Sizes) or select them, and then select different messages.

User (User, Notification) table is easy to divide: You make it base on user categories.

And when users delete messages, generally you should mark them instead of deleting it instead of deleting it. There is no reason to remove anything in the database most of the time.


Comments

Post a Comment

Popular posts from this blog

c# - ListView onScroll event -

-
I am programming a simple C # application, and I need a Scallow event on the list view. So I inherited the original ListView class created in ListviewEx witch. I found out how to locate the scroll message from WinAPI and I modified the WndProc method. Now I have this WndProc: protected override zero WndProc (Ref message message) {base.WndProc (Ref I); If (m.msg == WM_VSCROLL) {onScroll (This, New EventArgs ()); }} But the problem is, I do not know how to know about scrolling information. This data should be in wParam, but there is a LOWORD macro ++ like in C in C # and I switch to find the criteria like SB_ below, SB_ENDSCROLL, SB_PAGEUP etc. there any way Need to change the LOWORD macro from C #? Or any other way to find the necessary parameters about scrolling? You can define the WParam constants as the following: Private const int WM_HSCROLL = 0x114; Private Constant WM_VSCROLL = 0x115; Private contact int SBHOZZ = 0; Private Consultant SB_VERT = 1; Private Con...
Read more

PHP - get image from byte array -

-
I am trying to create a back-end for my mobile application. I am sending the content of an image in the body of the HTTP request (output stream) as a byte array, I want to read this stream of bytes in PHP scripts and take back an image. Can anyone tell me how can I do this? Thank you. You can obtain the request body $ body = Reading from file_get_contents ('php: // input'); What you do with that data Depending on you, you can write the data in a file as you mentioned that this is image data, you can drop the data into the object can do. Another option is to use and load the image.
Read more

Linux Terminal Problem with Non-Canonical Terminal I/O app -

-
I have a small app written in C to run on Linux. Part of the app accepts user-input from keyboard , And it uses non-canonical terminal mode so that it can respond to each keystroke. The section of the code that accepts input is a simple task that is called repeatedly in the loop: char get_input () {char C = 0; Int res = reading (input_tamille, & amp; c, 1); If (RSS == 0) 0 returns; If (res == -1) {/ * snip error handling * /} return c; } It reads a letter from the terminal if there is no input within a given time limit, (c_cc [VTIME] value in the vocabulary structure), read () 0 And get_input () is called again It all works very well, I have recently discovered that if you run this app in a terminal window, and then the app Close the terminal window without ending, the app will not exit Received, but CPU intensive launches into an infinite loop, where the read () returns 0 without waiting continued. So how can I get out of the apple if it runs from the terminal win...
Read more