• Building complex system is easy
• Resilience
• Concurrency
A good ADN
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P
P
P
P
Processes are solated
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P
P
P
P
Failure
The system continue to work
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P
P
P
P
Supervise & Recover
Detect failures and relauch
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a
good
citizen
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• View engine, couchapps in JS…
• Or any language.
• A language using the Erlang VM is quite easy
• 2.0 will have support of LFE, LUA, Elixir
A good ADN
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A good ADN
function(doc) {
emit(doc._id, null);
}
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• View engine, couchapps in JS…
• Or any language.
• A language using the Erlang VM is quite easy
• 2.0 will have support of LFE, LUA, Elixir
A good ADN
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• In rcouch a language is viewed as a process
• Input/Output protocole
• building elixir: rebar(3) plugin
• same for other languages
• shipped in a release or loaded
How: M/R & COUCHAPPS
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TO THE
NEXT
STEP
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KEEP THE
COUCH
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• Cluster Of Unreliable Commodity Hardware
• Decentralised
• works in condition when we can’t achieve the
“quorum”
A good ADN