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Dynom/file-bucket-strategy.php

Created April 10, 2013 07:50
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Calculating a uniform distribution with respect to file-system limitation's (files/sub-directories per directory)
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file-bucket-strategy.php
<?php
$networkEID = '0b3fe...a';
$fileEID = 'af4e0...f'
// e.g.: 19c679c10770acc216c26045cc5406c8155
$largeNumber = hash("sha1", $fileEID);
// Converting from base-16 to base-13
$hash = gmp_strval(gmp_init($largeNumber, 16), 13);
// Resulting path: /mnt/san/b1/34/c11b06b89859a226b11634c5901b9bc54/Foo.pdf
$pathToSave = STORAGE_ROOT .
$networkEID .
substr($hash, 0, 2) . DIRECTORY_SEPARATOR .
substr($hash, 2, 2) . DIRECTORY_SEPARATOR .
substr($hash, 4, 2) . DIRECTORY_SEPARATOR .
substr($hash, 6); // Filename
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