MongoGridFS::storeBytes
Pass
$options['safe'] = true;
to make Mongo slow down and do inserts sequentially instead of in parallel.
Use case:
I had 274 PDF documents stored on ext3 disk (avg. size was 5MB, none over 20MB)
A PHP loop loaded each PDF, then did a $GridFS->storeFile( $data, $meta );
This caused server to spike from load average of 0.2 to over 20.0
Apparently what was happening is the loop slammed Mongo (then memory, disk) with 274 convert/stores to do all at once.
Adding
$GridFS->storeFile( $data, $meta, array( 'safe' => true ) );
made the loop slow down and wait for each insert to finish and be confirmed before going on to next PDF.
Moral: Safe option can be used to maintain sanity and is not always just for data validity.
MongoGridFS::storeFile
(PECL mongo >=0.9.0)
MongoGridFS::storeFile — Stores a file in the database
Описание
Параметри
- filename
-
The name of the file.
- extra
-
Other metadata to add to the file saved.
Връщани стойности
Returns the _id of the saved object.
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User Contributed Notes
MongoGridFS::storeFile
mike at eastghost dot com
16-Feb-2012 01:50
mike at eastghost dot com
16-Feb-2012 01:31
A little confusing, but the "string $filename" (i.e., the first parameter) is the actual data that gets stored into the GridFS.