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https://github.com/attic-labs/noms

The versioned, forkable, syncable database
https://github.com/attic-labs/noms

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The versioned, forkable, syncable database

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README 

        
# Warning - This project is not active



Noms is not being maintained. You shouldn't use it, except maybe for fun or research.



If you are interested in something like Noms, you probably want Dolt (https://github.com/dolthub/dolt) which is a fork of this project and actively maintained.



Send me (aaron at aaronboodman.com) a message if you have questions.









[Use Cases](#use-cases)  |  [Setup](#setup)  |  [Status](#status)  |  [Documentation](./doc/intro.md)  |  [Contact](#contact-us)






[![Build Status](https://travis-ci.org/attic-labs/noms.svg?branch=master)](https://travis-ci.org/attic-labs/noms)

[![Docker Build Status](https://img.shields.io/docker/build/noms/noms.svg)](https://hub.docker.com/r/noms/noms/)

[![GoDoc](https://godoc.org/github.com/attic-labs/noms?status.svg)](https://godoc.org/github.com/attic-labs/noms)



# Welcome



*Noms* is a decentralized database philosophically descendant from the Git version control system.



Like Git, Noms is:



* **Versioned:** By default, all previous versions of the database are retained. You can trivially track how the database evolved to its current state, easily and efficiently compare any two versions, or even rewind and branch from any previous version.

* **Synchronizable:** Instances of a single Noms database can be disconnected from each other for any amount of time, then later reconcile their changes efficiently and correctly.



Unlike Git, Noms is a database, so it also:



* Primarily **stores structured data**, not files and directories (see: [the Noms type system](https://github.com/attic-labs/noms/blob/master/doc/intro.md#types))

* **Scales well** to large amounts of data and concurrent clients

* Supports **atomic transactions** (a single instance of Noms is CP, but Noms is typically run in production backed by S3, in which case it is "[effectively CA](https://cloud.google.com/spanner/docs/whitepapers/SpannerAndCap.pdf)")

* Supports **efficient indexes** (see: [Noms prolly-trees](https://github.com/attic-labs/noms/blob/master/doc/intro.md#prolly-trees-probabilistic-b-trees))

* Features a **flexible query model** (see: [GraphQL](./go/ngql/README.md))



A Noms database can reside within a file system or in the cloud:



* The (built-in) [NBS](./go/nbs) `ChunkStore` implementation provides two back-ends which provide persistence for Noms databases: one for storage in a file system and one for storage in an S3 bucket.



Finally, because Noms is content-addressed, it yields a very pleasant programming model.



Working with Noms is ***declarative***. You don't `INSERT` new data, `UPDATE` existing data, or `DELETE` old data. You simply *declare* what the data ought to be right now. If you commit the same data twice, it will be deduplicated because of content-addressing. If you commit _almost_ the same data, only the part that is different will be written.







## Use Cases



#### [Decentralization](./doc/decent/about.md)



Because Noms is very good at sync, it makes a decent basis for rich, collaborative, fully-decentralized applications.



#### Mobile Offline-First Database



Embed Noms into mobile applications, making it easier to build offline-first, fully synchronizing mobile applications.







## Install



1. Download the latest release:

 - [**Linux**](https://github.com/attic-labs/noms/releases/download/latest/linux.zip)

 - [**Mac OS**](https://github.com/attic-labs/noms/releases/download/latest/osx.zip)

2. Unzip the directory somewhere and add it to your `$PATH`

3. Verify Noms is installed correctly:



```

$ noms version

format version: 7.18

built from 

```







## Run



Import some data:



```shell

go install github.com/attic-labs/noms/samples/go/csv/csv-import

curl 'https://data.cityofnewyork.us/api/views/kku6-nxdu/rows.csv?accessType=DOWNLOAD' > /tmp/data.csv

csv-import /tmp/data.csv /tmp/noms::nycdemo

```



Explore:



```shell

noms show /tmp/noms::nycdemo

```



Should show:



```go

struct Commit {

  meta: struct Meta {

    date: "2017-09-19T19:33:01Z",

    inputFile: "/tmp/data.csv",

  },

  parents: set {},

  value: [  // 236 items

    struct Row {

      countAmericanIndian: "0",

      countAsianNonHispanic: "3",

      countBlackNonHispanic: "21",

      countCitizenStatusTotal: "44",

      countCitizenStatusUnknown: "0",

      countEthnicityTotal: "44",

...

```







## Status



Nobody is working on this right now. You shouldn't rely on it unless you're willing to take over development yourself.



### Major Open Issues



These are the major things you'd probably want to fix before relying on this for most systems.



* Sync performance with long commit chains (https://github.com/attic-labs/noms/issues/2233)

* Migration (https://github.com/attic-labs/noms/issues/3363)

* Garbage Collection (https://github.com/attic-labs/noms/issues/3374)

* Query language

  * We started trying to hack in GraphQL but it's incomplete and maybe not the right thing. See: [ngql](./go/ngql/README.md)

* [Various other smaller bugs and improvements](https://github.com/attic-labs/noms/issues?q=is%3Aissue+is%3Aopen+label%3AP0)







## Learn More About Noms



For the decentralized web: [The Decentralized Database](doc/decent/about.md)



Learn the basics: [Technical Overview](doc/intro.md)



Tour the CLI: [Command-Line Interface Tour](doc/cli-tour.md)



Tour the Go API: [Go SDK Tour](doc/go-tour.md)







## Contact Us



Interested in using Noms? Awesome! We would be happy to work with you to help understand whether Noms is a fit for your problem. Reach out at:



- [Mailing List](https://groups.google.com/forum/#!forum/nomsdb)

- [Twitter](https://twitter.com/nomsdb)



## Licensing



Noms is open source software, licensed by Attic Labs, Inc. under the Apache License, Version 2.0.