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FunctionalBreakdown init #4

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35 changes: 35 additions & 0 deletions FunctionalBreakdown.md
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| number | function name | note about the function |
| ------ | ------------------------------------- | -------------------------------------------------------------------------------------------------------- |
| 1 | consensus | makes sure the order of events is identical on each node |
| 1.1 | leader election | |
| 1.1.1 | alive checks | makes sure |
| 1.2 | request's lineriazability | |
| 1.2.1 | sequence id generator | |
| 1.3 | consensus confirmation | |
| | | |
| 2 | healthy cluster | "control plan" makes sure the cluster is healthy and cluster's metrics(ex: synchronization lag) are good |
| 2.1 | needed amount of nodes in the cluster | |
| 2.1.1 | state restoration | |
| 2.2 | secretes management | |
| | | |
| 3 | transport | anything related to the transport: maintain connections, protocol, etc. |
| 3.1 | transport between nodes in cluster | |
| 3.2 | transport between cluster and clients | |
| | | |
| 4 | logic execution | business logic execution |
| 4.1 | | |
| | | |
| 5 | storage | storage on nodes(leader + followers) |
| 5.1 | store sequence of operations | |
| 5.2 | store object meta info | hash, version, etc. |
| | | |
| 6 | durability | |
| 6.1 | backup | |
| 6.2 | restore | |
| 6.3 | drift checks | bit flips, write errors, etc. |
| | | |
| 7 | gateway | client's sidecar |
| 7.1 | sends requests | knows where to send, who is the leader |
| 7.2 | receives pushes | pushes from cluster, server-side-events |
| 7.3 | DSL parser | |