note 90320 modified in function.base-convert by danbrown
| From: | danbrown@php.net | Date: | Thu, 16 Apr 2009 12:59:30 +0000 |
| Subject: | note 90320 modified in function.base-convert by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-153383@lists.php.net to get a copy of this message | ||
If you want to do sharding, at some point you will need to decide which shard to target. Here is a
simple function to assign the data to a particular shard based on a key (usually identifier of the
row)
Here is a simple function to get the shard based on the key and the number of shards available
<?php
function getShard($key,$nbShards) {
$num = substr(base_convert(sha1($key), 16, 10),4,6);
return $num%$nbShards;
}
?>
--was--
If you want to do sharding, at some point you will need to decide which shard to target. Here is a
simple function to assign the data to a particular shard based on a key (usually identifier of the
row)
Here is a simple function to get the shard based on the key and the number of shards available
function getShard($key,$nbShards) {
$num = substr(base_convert(sha1($key), 16, 10),4,6);
return $num%$nbShards;
}
http://php.net/manual/en/function.base-convert.php