mirror of
https://github.com/minio/minio.git
synced 2024-12-29 08:33:21 -05:00
67 lines
2.7 KiB
Markdown
67 lines
2.7 KiB
Markdown
# NUID
|
|
|
|
[](http://opensource.org/licenses/MIT)
|
|
[](http://goreportcard.com/report/nats-io/nuid)
|
|
[](http://travis-ci.org/nats-io/nuid)
|
|
[](https://github.com/nats-io/nuid/releases/tag/v1.0.0)
|
|
[](http://godoc.org/github.com/nats-io/nuid)
|
|
[](https://coveralls.io/github/nats-io/nuid?branch=master)
|
|
|
|
A highly performant unique identifier generator.
|
|
|
|
## Installation
|
|
|
|
Use the `go` command:
|
|
|
|
$ go get github.com/nats-io/nuid
|
|
|
|
## Basic Usage
|
|
```go
|
|
|
|
// Utilize the global locked instance
|
|
nuid := nuid.Next()
|
|
|
|
// Create an instance, these are not locked.
|
|
n := nuid.New()
|
|
nuid = n.Next()
|
|
|
|
// Generate a new crypto/rand seeded prefix.
|
|
// Generally not needed, happens automatically.
|
|
n.RandomizePrefix()
|
|
```
|
|
|
|
## Performance
|
|
NUID needs to be very fast to generate and be truly unique, all while being entropy pool friendly.
|
|
NUID uses 12 bytes of crypto generated data (entropy draining), and 10 bytes of pseudo-random
|
|
sequential data that increments with a pseudo-random increment.
|
|
|
|
Total length of a NUID string is 22 bytes of base 36 ascii text, so 36^22 or
|
|
17324272922341479351919144385642496 possibilities.
|
|
|
|
NUID can generate identifiers as fast as 60ns, or ~16 million per second. There is an associated
|
|
benchmark you can use to test performance on your own hardware.
|
|
|
|
## License
|
|
|
|
(The MIT License)
|
|
|
|
Copyright (c) 2016 Apcera Inc.
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
of this software and associated documentation files (the "Software"), to
|
|
deal in the Software without restriction, including without limitation the
|
|
rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
|
sell copies of the Software, and to permit persons to whom the Software is
|
|
furnished to do so, subject to the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be included in
|
|
all copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
IN THE SOFTWARE.
|