LS4 is a distributed storage system that can store large data like photos, music or movies.
- Scalability
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Grows storage capacity and I/O throughput dynamically without any modification of applications.
- Availability
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Prevents whole system falt from partial hardware crashes by failing-over within very small downtime.
- Versioning
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Takes back old data by creation time or version name of the stored objects.
- Continuous snapshot
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Supported based on time-based versioning.
- Geo-redundancy
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Supports replication of objects across multiple datacenters.
- Direct data transfer
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Reduces local network traffic and load of front-end servers by cooperating with proxy servers.
- Traffic offloading
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Enhances performance of data servers by offloading traffics to native web servers.
LS4 stores a set of objects identified by a key. Each object consists with data and attributes, and can have multiple versions.
key object data attributes +-----------------+---------------------------------+ ---+ "image1" => | "HTJ PNG ..." | { type:png, model:NEX-5 } |--+ | each object can +-----------------+---------------------------------+ |--+ | have multiple +-----------------+----------------------------------+ | | versoins +----------------+-----------------------------------+ | ---+ +-----------------+---------------------------------+ key => | bytes ....... | { key:value, key:value, ... } |--+ +-----------------+---------------------------------+ |--+ +-----------------+----------------------------------+ | +----------------+-----------------------------------+ ... => ...
For more details, see LS4 Documents.
$ gem install ls4 $ ls4-standalone -s ./data -h 18080 & $ curl -X POST -d 'data=value1&attrs={"test":"attr"}' http://localhost:18080/data/key1 $ curl -X GET http://localhost:18080/data/key1 value1 $ curl -X GET http://localhost:18080/attrs/key1 {"test":"attr"}
- Project web site
- Documents
- Documents (Japanese)
- Source repository
- Author
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FURUHASHI Sadayuki
- Copyright
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© 2010-2011 FURUHASHI Sadayuki
- License
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AGPL
See also NOTICE file.