What is MIME type "application/x-mysql-misam-compressed-index"?

A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.

application/x-mysql-misam-compressed-index is used by MySQL to mark a compressed index file. It stores index data in a compressed format to speed up data retrieval.

This MIME type is linked with the MYI file. The file holds pre-sorted index data for tables managed by the MyISAM storage engine.

Database Optimization: It allows fast lookups during query processing.
Data Compression: It reduces storage used by index files.
Backup Processes: It forms part of the file set when backing up a MySQL database.

For more technical details, see the MySQL Documentation.

Associated file extensions

.myi

Usage Examples

HTTP Header

When serving content with this MIME type, set the Content-Type header:


    Content-Type: application/x-mysql-misam-compressed-index

HTML

In HTML, you can specify the MIME type in various elements:


    <a href="file.dat" type="application/x-mysql-misam-compressed-index">Download file</a>

Server-side (Node.js)

Setting the Content-Type header in Node.js:


    const http = require('http');
    
    http.createServer((req, res) => {
      res.setHeader('Content-Type', 'application/x-mysql-misam-compressed-index');
      res.end('Content here');
    }).listen(3000);

Associated file extensions

.myi

FAQ

What is a MIME type?

A MIME (Multipurpose Internet Mail Extensions) type is a standard that indicates the nature and format of a document, file, or assortment of bytes. MIME types are defined and standardized in IETF's RFC 6838.

MIME types are important because they help browsers and servers understand how to process a file. When a browser receives a file from a server, it uses the MIME type to determine how to display or handle the content, whether it's an image to display, a PDF to open in a viewer, or a video to play.

MIME types consist of a type and a subtype, separated by a slash (e.g., text/html, image/jpeg, application/pdf). Some MIME types also include optional parameters.

How do I find the MIME type for a file?

You can check the file extension or use a file identification tool such as file --mime-type on the command line. Many programming languages also provide libraries to detect MIME types.

Why are multiple MIME types listed for one extension?

Different applications and historical conventions may use alternative MIME identifiers for the same kind of file. Showing them all helps ensure compatibility across systems.