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Line 41: − + − − === Synchronisation === − − To let Network participant, connected to particular [[#Node_servers|Node server]], interact with people from another Node servers or with people from the Internet, Node servers need to be synchronized. − − Server might be synchronised: − − * With the Master, if connectivity presents; − * With the Master or any other Node servers via the [[Wikipedia:Sneakernet|Sneakernet]]. Line 96:
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Platform Team/Sugar Network/Architecture (view source)
Revision as of 06:05, 1 July 2012
, 06:05, 1 July 2012no edit summary
* Clients create, modify and browse different types of resources ([[Sugar_Network/Concept#Resources|resources]] from conceptual point of view, [[Platform_Team/Sugar_Network/API#Resources|resources]] from the API point of view) on a server;
* Clients create, modify and browse different types of resources ([[Sugar_Network/Concept#Resources|resources]] from conceptual point of view, [[Platform_Team/Sugar_Network/API#Resources|resources]] from the API point of view) on a server;
* If this server is a [[#Node_servers|Node]] server, the system will take care about [[#Synchronisation|synchronizing]] its resources with other Node servers and, finally, with the central one, the [[#Master_server|Master]] server.
* If this server is a [[#Node_servers|Node]] server, the system will take care about [[#Synchronization|synchronizing]] its resources with other Node servers and, finally, with the central one, the [[#Master_server|Master]] server.
=== Components ===
=== Components ===
* [[#Master_server|Master]] server that keeps the whole Sugar Network information, clients might connect directly to this server (on-line case) or indirectly via Node servers (off-line case);
* [[#Master_server|Master]] server that keeps the whole Sugar Network information, clients might connect directly to this server (on-line case) or indirectly via Node servers (off-line case);
* Optional [[#Node_servers|Node]] servers, contain a [[#Synchronisation|synchronised]] copy of central server (might be not for the entire Network to save storage space);
* Optional [[#Node_servers|Node]] servers, contain a [[#Synchronization|synchronised]] copy of central server (might be not for the entire Network to save storage space);
In all cases the server [[Platform_Team/Sugar_Network/API|API]] is the same for clients. But depending on connectivity, clients might be connected to the [[#Master_server|Master]] server or to a [[#Node_servers|intermediate server]].
In all cases the server [[Platform_Team/Sugar_Network/API|API]] is the same for clients. But depending on connectivity, clients might be connected to the [[#Master_server|Master]] server or to a [[#Node_servers|intermediate server]].
* connectivity is not cheap and its usage needs to be minimized.
* connectivity is not cheap and its usage needs to be minimized.
Node servers provide full featured [[Platform_Team/Sugar_Network/API|API]] as the Master does. Nodes need to be [[#Synchronisation|synchronized]].
Node servers provide full featured [[Platform_Team/Sugar_Network/API|API]] as the Master does. Nodes need to be [[#Synchronization|synchronized]].
== Conceptual level ==
== Conceptual level ==
=== Implementations ===
=== Implementations ===
* [[Platform_Team/Sugar_Network/Mejorar_Sistema|Mejorar Sistema]].
* [[Platform_Team/Sugar_Network/Web_UI|Web UI]].
== Synchronization ==
To let Network participant, connected to particular [[#Node_servers|Node server]], interact with people from another Node servers or with people from the Internet (Master server), Node servers need to be synchronized.
Server might be synchronized:
* With the Master, if connectivity presents;
* With the Master or any other Node servers via the [[Wikipedia:Sneakernet|Sneakernet]].
=== Sneakernet ===
Packets' structure:
* '''PUSH''' packet:
:* {{Code|type}}: {{Code|push}}
:* {{Code|sender}}: sender's GUID to push from
:* {{Code|[receiver]}}: receiver's GUID to push to, optional for packets from master
:* {{Code|sequence}}: Sequence associated with packet's payload
* '''ACK''' packet:
:* {{Code|type}}: {{Code|ack}}
:* {{Code|sender}}: master's GUID
:* {{Code|receiver}}: receiver's GUID ack is intended for
:* {{Code|push_sequence}}: original PUSH packet's sequence
:* {{Code|pull_sequence}}: Sequence after merging original PUSH packet
* '''PULL''' packet:
:* {{Code|type}}: {{Code|pull}}
:* {{Code|sender}}: sender's GUID to pull to
:* {{Code|receiver}}: receiver's GUID to pull from
:* {{Code|sequence}}: Sequence to pull for
== Getting involved ==
== Getting involved ==