| title |
|---|
Update Commit File |
A update commit file has name <timestamped_name>.upd and is located here:
my_array # array folder
|_ ....
|_ __commits # array commits folder
|_ <timestamped_name>.upd # update commit file
|_ ...
There may be multiple such files in the array commits folder. Each update commit file contains a tile with a serialized update condition, which is a tree of nodes followed by update values, which is a list of values. Each node for the condition can be a value node or expression node. Expression nodes have the following on disk format:
| Field | Type | Description |
|---|---|---|
| Node type | uint8_t |
0 for expression node |
| Combination op | uint8_t |
AND(0), OR(1), NOT(2) |
| Num children | uint64_t[] |
Number of child nodes |
| Children 1 | NODE |
children 1 |
| … | … | … |
| Children N | NODE |
Children N |
Value nodes have the following on disk format:
| Field | Type | Description |
|---|---|---|
| Node type | uint8_t |
1 for value node |
| Op | uint8_t |
LT(0), LE(1), GT(2), GE(3), EQ(4), NE(5) |
| Field name size | uint32_t |
Size of the field name |
| Field name value | uint8_t[] |
Field name value |
| Value size | uint64_t |
Value size |
| Value content | uint8_t[] |
Value |
Update values are serialized in the following format:
| Field | Type | Description |
|---|---|---|
| Number of values | uint64_t |
Number of values N |
| Field name size 1 | uint64_t |
Size of the field name for the first update value |
| Field name value 1 | uint8_t[] |
Field name value for the first update value |
| Value size 1 | uint64_t |
Value size for first update value |
| Value content 1 | uint8_t[] |
Value for first update value |
| … | … | … |
| Field name size N | uint64_t |
Size of the field name for update value N |
| Field name value N | uint8_t[] |
Field name value for update value N |
| Value size N | uint64_t |
Value size for update value N |
| Value content N | uint8_t[] |
Value for update value N |