https://github.com/leo-project/leo_backend_db

leo_backend_db is a wrapper library for Basho bitcask, Basho eleveldb and Erlang ETS. They are used as local KVS in LeoFS.
https://github.com/leo-project/leo_backend_db

erlang kvs leofs library

Last synced: about 2 months ago
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leo_backend_db is a wrapper library for Basho bitcask, Basho eleveldb and Erlang ETS. They are used as local KVS in LeoFS.

• Host: GitHub
• URL: https://github.com/leo-project/leo_backend_db
• Owner: leo-project
• License: apache-2.0
• Created: 2012-06-06T15:23:53.000Z (over 12 years ago)
• Default Branch: v2
• Last Pushed: 2020-05-31T05:21:55.000Z (over 4 years ago)
• Last Synced: 2024-04-23T14:10:04.000Z (8 months ago)
• Topics: erlang, kvs, leofs, library
• Language: Erlang
• Homepage: http://leo-project.net/leofs
• Size: 1.44 MB
• Stars: 10
• Watchers: 5
• Forks: 8
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
leo_backend_db

==============

[![Build Status](https://secure.travis-ci.org/leo-project/leo_backend_db.png?branch=v2)](http://travis-ci.org/leo-project/leo_backend_db)

* **leo_backend_db** is wrapper of local KVS and uses Basho bitcask, Basho eleveldb and Erlang ETS.

  * [bitcask](https://github.com/basho/bitcask)

  * [eleveldb](https://github.com/basho/eleveldb)

  * [Erlang ETS](http://www.erlang.org/doc/man/ets.html)

## Build Information

* **leo_backend_db** uses [rebar](https://github.com/basho/rebar) build system. Makefile so that simply running "make" at the top level should work.

* **leo_backend_db** requires Erlang/OTP 19.3 or later.

## Usage

```

$ git clone [email protected]:leo-project/leo_backend_db.git

$ cd leo_backend_db

$ make

$ mkdir test_db

$ erl -pa ebin deps/*/ebin

Erlang/OTP 21 [erts-10.3] [source] [64-bit] [smp:12:12] [ds:12:12:10] [async-threads:1] [hipe]

Eshell V10.3  (abort with ^G)

1> leo_backend_db_api:new(test_leveldb, 2, leveldb, "test_db").

ok

2> leo_backend_db_api:put(test_leveldb, <<"key1">>, <<"val1">>).

ok

3> leo_backend_db_api:get(test_leveldb, <<"key1">>).

{ok,<<"val1">>}

4> leo_backend_db_api:stop(test_leveldb).

...

```

## Usage in LeoFS

**leo_backend_db** is used in [leo_object_storage](https://github.com/leo-project/leo_object_storage) and [leo_mq](https://github.com/leo-project/leo_mq).

### [leo_object_storage](https://github.com/leo-project/leo_object_storage)

**leo_backend_db** works to handle the backend database of LeoFS. It manages the stored objects in LeoFS.

### [leo_mq](https://github.com/leo-project/leo_mq)

**backend_db** is also used to manage message queue among the LeoFS storage nodes.

## Lincense

leo_backend_db's license is "Apache License Version 2.0".

## Sponsors

* LeoProject/LeoFS was sponsored by [Rakuten, Inc.](http://global.rakuten.com/corp/) from 2012 to Dec of 2018.

* LeoProject/LeoFS is sponsored by [Lions Data, Ltd](https://lions-data.com/) from Jan of 2019.