87 lines
2.7 KiB
Markdown
87 lines
2.7 KiB
Markdown
# Metabase versioning
|
|
|
|
This file describes changes between the metabase versions.
|
|
|
|
## Version 0
|
|
|
|
- Container ID is encoded as base58 string
|
|
- Object ID is encoded as base58 string
|
|
- Address is encoded as container ID + "/" + object ID
|
|
|
|
### Primary buckets
|
|
- Graveyard bucket
|
|
- Name: `_Graveyard`
|
|
- Key: object address
|
|
- Value: tombstone address
|
|
- Garbage bucket
|
|
- Name: `_Garbage`
|
|
- Key: object address
|
|
- Value: dummy value
|
|
- Bucket containing IDs of objects that are candidates for moving
|
|
to another shard.
|
|
- Name: `_ToMoveIt`
|
|
- Key: object address
|
|
- Value: dummy value
|
|
- Container volume bucket
|
|
- Name: `_ContainerSize`
|
|
- Key: container ID
|
|
- Value: container size in bytes as little-endian uint64
|
|
- Bucket for storing locked objects information
|
|
- Name: `_Locked`
|
|
- Key: container ID
|
|
- Value: bucket mapping objects locked to the list of corresponding LOCK objects
|
|
- Bucket containing auxilliary information. All keys are custom and are not connected to the container
|
|
- Name: `_i`
|
|
- Keys and values
|
|
- `id` -> shard id as bytes
|
|
- `version` -> metabase version as little-endian uint64
|
|
|
|
### Unique index buckets
|
|
- Buckets containing objects of REGULAR type
|
|
- Name: container ID
|
|
- Key: object ID
|
|
- Value: marshalled object
|
|
- Buckets containing objects of LOCK type
|
|
- Name: container ID + `_LOCKER`
|
|
- Key: object ID
|
|
- Value: marshalled object
|
|
- Buckets containing objects of STORAGEGROUP type
|
|
- Name: container ID + `_SG`
|
|
- Key: object ID
|
|
- Value: marshaled object
|
|
- Buckets containing objects of TOMBSTONE type
|
|
- Name: container ID + `_TS`
|
|
- Key: object ID
|
|
- Value: marshaled object
|
|
- Buckets mapping objects to the blobovniczas they are stored in
|
|
- Name: container ID + `_small`
|
|
- Key: object ID
|
|
- Value: blobovnicza ID
|
|
- Buckets for mapping parent object to the split info
|
|
- Name: container ID + `_root`
|
|
- Key: object ID
|
|
- Value: split info
|
|
|
|
### FKBT index buckets
|
|
- Buckets mapping owner to object IDs
|
|
- Name: containerID + `_ownerid`
|
|
- Key: owner ID as base58 string
|
|
- Value: bucket containing object IDs as keys
|
|
- Buckets containing objects attributes indexes
|
|
- Name: containerID + `_attr_` + attribute key
|
|
- Key: attribute value
|
|
- Value: bucket containing object IDs as keys
|
|
|
|
### List index buckets
|
|
- Buckets mapping payload hash to a list of object IDs
|
|
- Name: container ID + `_payloadhash`
|
|
- Key: payload hash
|
|
- Value: list of object IDs
|
|
- Buckets mapping parent ID to a list of children IDs
|
|
- Name: container ID + `_parent`
|
|
- Key: parent ID
|
|
- Value: list of children object IDs
|
|
- Buckets mapping split ID to a list of object IDs
|
|
- Name: container ID + `_splitid`
|
|
- Key: split ID
|
|
- Value: list of object IDs
|