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42 lines
1.7 KiB
Markdown
42 lines
1.7 KiB
Markdown
---
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tags:
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- codex/block-storage
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related:
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- "[[Uploading and downloading content in Codex]]"
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- "[[Codex Blocks]]"
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- "[[Codex Block Exchange Protocol]]"
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---
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#codex/block-storage
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| related | [[Uploading and downloading content in Codex]], [[Codex Blocks]], [[Codex Block Exchange Protocol]] |
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| ------- | --------------------------------------------------------------------------------------------------- |
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To store blocks and the corresponding metadata, we use `RepoStore`.
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`RepoStore` is a proxy to two underlying stores:
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- `repoDS` - to store the blocks themselves - by default it is `FSDatastore` as indicated by option `repoKind` in `CodexConf` (`codex/conf.nim`). Other types of storage are also available: `SQLiteDatastore`, `LevelDbDatastore`.
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- `metaDS` - to store the blocks' metadata - `LevelDbDatastore` (`vendor/nim-datastore/datastore/leveldb/leveldbds.nim`).
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The stores are initialized in `CodexServer.new` (`codex/codex.nim`) and injected into `repoStore` (type `RepoStore` defined in `codex/stores/repostore/types.nim`):
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```nim
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repoStore = RepoStore.new(
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repoDs = repoData,
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metaDs = LevelDbDatastore.new(config.dataDir / CodexMetaNamespace).expect(
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"Should create metadata store!"
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),
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quotaMaxBytes = config.storageQuota,
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blockTtl = config.blockTtl,
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)
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```
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The default value for `storageQuota` is given by `config.storageQuota` and `config.blockTtl` (`codex/stores/repostore/types.nim`):
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```nim
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const
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DefaultBlockTtl* = 24.hours
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DefaultQuotaBytes* = 8.GiBs
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```
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`repoStore` together with `engine` (`BlockExcEngine`) are parts of `NetworkStore`, which together with `switch`, `engine`, `discovery`, and `prover` is then provided to `codexNode` (`CodexNodeRef`). |