The document discusses storing and serving images using GridFS instead of traditional file systems, highlighting the limitations of file systems such as poor scaling and lack of metadata. It emphasizes GridFS's advantages, including automatic load balancing and backup through replica sets. An example PHP code snippet is provided to demonstrate how to retrieve and display images stored in GridFS.

1. STORING AND SERVING IMAGES WITH
GRIDFS
Mr. Mongo Mark
@m_smalley

2. z
MEDIA STORAGE & SERVING
( without using a file-system )

3. z
WHY DO FILESYSTEMS SUCK ...?
( at serving media on the web )

4. POOR AT SCALING
( with tedious back-ups and I/O bottlenecks )

5. POOR METADATA
( lacking built-in meta storage and data queries )

6. STRICT CONVENTIONS
( naming and directory limits cause poor reliability )

7. GRIDFS ALSO USES REPLICA-SETS
( all media backed-up and load-balanced in chunks )

8. GRIDFS ALSO USES REPLICA-SETS
( all media backed-up and load-balanced in chunks )

9. EXAMPLE PHP
CODE
GETTING IMAGES OUT

10. www.your-domain.com/images/tron.jpg
( assuming .htaccess is redirecting within folder )
// Get Filename
$slug = $_SERVER[‘REQUEST_URI’];
// Define Database
$db = $m->$options['db_name'];
// Get GridFS
$grid = $db->getGridFS();
// Get Image
$image = $grid->findOne(
array("name" => $slug)
);
// Display Image
header('Content-type: '.$image->file['type']);
echo $image->getBytes();

11. STALK ME ON TWITTER IF YOU LIKE
@m_smalley
Twitter Hashtag #klmug
KL MUG on Twitter @klmug
KL MUG on Facebook
https://www.facebook.com/groups/klmug/