如何在Java Web应用程序中存储文件？

Question

This is a design related question.

I have a java web application(connected to MySQL database) running on tomcat. It runs on both linux and windows machines separately(as of now). I should store files which come as input, whose size varies from 500 KB to 100 MB (max). The use of these files is to parse them and get required data. I can use the 'blob' in database schema to store files, access them to generate the required output and store them in MySQL db. Else, I can use file system to store the files in the windows or linux filesystem and use them to extract the data, store it in MySQL db. In any month I will be saving close to 200 files of varying length. I am unable to decide which implementation to choose?

The following are some pros and cons which I came up comparing filesystem vs database.

File-System:

1. automated indexing of files by OS.
2. easier to access files.
3. MySQL database that I use for other tables doesn't store huge amounts of data (200 files * 50 MB average = 10GB data).
4. Varying lengths of the files doesn't matter much to the DB( the typical blob sizes for MySQL is, TINYBLOB: 255 bytes BLOB: 65,535 bytes (64 KB) MEDIUMBLOB: 16,777,215 bytes (16 MB) LONGBLOB: 4 GB So if my file size is >16MB I should store it as a LONGBLOB. which means for the size range I should be using LONGBLOB to store 500 KB file or a 100 MB file.

MySQL:

1. Faster access.
2. Single place for all the data. Data extracted from files and files are stored in one location.
3. ..

Answer 1

Read https://dba.stackexchange.com/questions/2445/files-in-the-database-or-not

This is a good article too: http://www.revsys.com/blog/2012/may/01/three-things-you-should-never-put-your-database/

I think it depends on how much read/write activity you have. I'm personally in favor of keeping these files in the database specially if you have a fast database like MongoDB. You put a limitation of 100MG so it wouldn't get that large either.