Data::YUID - Distributed ID generator ("Yet another Unique ID")
## Generating a unique ID within a particular process... use Data::YUID::Generator; my $generator = Data::YUID::Generator->new; my $id = $generator->get_id; ## Generating a unique ID from a set of distributed servers... use Data::YUID::Client; my $client = Data::YUID::Client->new( servers => [ '192.168.100.4:11001', '192.168.100.5:11001', ], ); my $id = $client->get_id; ## some utilities (useful for debugging) my $id = $generator->get_id; say Data::YUID->as_string($id); # timestamp:15855749 serial:ffc host:fbdd say Data::YUID->host($id); say Data::YUID->timestamp($id); say Data::YUID->serial($id);
Data::YUID ("Yet another Unique ID") is an ID allocation engine that can be used both in client/server mode--with a set of distributed servers--and within a single process.
It generates IDs with temporal and spatial uniqueness. These IDs are less universally unique than Type-1 UUIDs, because they have only 64 bits of usable ID space split up between the various parts. Currently, ID generation uses this split:
16 bits of host ID (akin to a locally provisioned MAC address) 36 bits of time in seconds since the epoch (currently Jan 1 2000 00:00 GMT) 12 bits of serial incrementor
Given the following restrictions, a YUID generator will generate guaranteed globally (within your control) unique IDs:
The size of the incrementor is dependent on the rate of request. For IDs with a short lifetime but high request rate, you could use fewer time bits and more serial bits.
Data::YUID is free software; you may redistribute it and/or modify it under the same terms as Perl itself.
Except where otherwise noted, Data::YUID is Copyright 2005 Six Apart, email@example.com. All rights reserved.