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Fix Typos and Improve Clarity Across Documentation (#289)
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* typo proof-of-random-access.md * typos transaction-processing.md * typos README.md * typos mining-reward.md
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Across the two lanes, 0G Storage supports the following features:
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Across the two lanes, 0G Storage supports the following features:
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* **General Purpose Design**: Supports atomic transactions, mutable key-value stores, and archive log systems, enabling a wide range of applications with various data types.
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* **General Purpose Design**: Supports atomic transactions, mutable key-value stores, and archive log systems, enabling a wide range of applications with various data types.
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* **Validated Incentivization**: Utilizes the PoRA (Proof of Random Access) mining algorithm to mitigate data outsourcing issue and to ensure rewards are distributed to nodes who contribute to the storage network.
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* **Validated Incentivization**: Utilizes the PoRA (Proof of Random Access) mining algorithm to mitigate the data outsourcing issue and to ensure rewards are distributed to nodes who contribute to the storage network.
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For in-depth technical details about 0G Storage, please read our [Intro to 0G Storage](https://docs.0g.ai/og-storage).
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For in-depth technical details about 0G Storage, please read our [Intro to 0G Storage](https://docs.0g.ai/og-storage).
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0G Storage creates pricing segments every 8 GB of data chunks over the data flow. Each pricing segment is associated with an Endowment Pool and a Reward Pool. The Endowment Pool collects the storage endowments of all the data chunks belongs to this pricing segment and releases a fixed ratio of balance to the Reward Pool every second. The rate of reward release is set to 4% per year.
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0G Storage creates pricing segments every 8 GB of data chunks over the data flow. Each pricing segment is associated with an Endowment Pool and a Reward Pool. The Endowment Pool collects the storage endowments of all the data chunks belongs to this pricing segment and releases a fixed ratio of balance to the Reward Pool every second. The rate of reward release is set to 4% per year.
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The mining reward is paid to miners for providing data service. Miners receive mining reward when submit the first legitimate PoRA for a mining epoch to 0G Storage contract. The mining reward consists of two parts:
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The mining reward is paid to miners for providing data service. Miners receive mining reward when submit the first legitimate PoRA for a mining epoch to 0G Storage contract.
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The mining reward consists of two parts:
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The mining reward consists of two parts:
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6. For each piece $$\overrightarrow{v}$$, compute the Blake2b hash of the tuple ($$\mathsf{miner\_id}$$, $$\mathsf{nonce}$$, $$\mathsf{context\_digest}$$, $$\mathsf{start\_position}$$, $$\mathsf{mine\_length}$$, $$\overrightarrow{v}$$).
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6. For each piece $$\overrightarrow{v}$$, compute the Blake2b hash of the tuple ($$\mathsf{miner\_id}$$, $$\mathsf{nonce}$$, $$\mathsf{context\_digest}$$, $$\mathsf{start\_position}$$, $$\mathsf{mine\_length}$$, $$\overrightarrow{v}$$).
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7. If one of Blake2b hash output is smaller than a target value, the miner finds a legitimate PoRA solution.
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7. If one of Blake2b hash output is smaller than a target value, the miner finds a legitimate PoRA solution.
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<figure><img src="../../../.gitbook/assets/zg-storage-algorithm.png" alt=""><figcaption><p>Figure 1. Recall Position and Scratchpat Computation</p></figcaption></figure>
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<figure><img src="../../../.gitbook/assets/zg-storage-algorithm.png" alt=""><figcaption><p>Figure 1. Recall Position and Scratchpad Computation</p></figcaption></figure>
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When an application server linking with the 0G Storage key-value runtime starts a transaction using `BeginTx()` interface, it notifies the runtime that the transaction will work on the current state snapshot constructed by playing the log to the current tail. The further key-value operations before the invocation of `EndTx()` updates the key-values locally in the server without exposing the updates to the log. When `EndTx()` is invoked, the runtime composes a commit record containing the log position the transaction starts from and the read-write set of the transaction. This commit record is then appended to the log.
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When an application server linking with the 0G Storage key-value runtime starts a transaction using `BeginTx()` interface, it notifies the runtime that the transaction will work on the current state snapshot constructed by playing the log to the current tail. The further key-value operations before the invocation of `EndTx()` updates the key-values locally in the server without exposing the updates to the log. When `EndTx()` is invoked, the runtime composes a commit record containing the log position the transaction starts from and the read-write set of the transaction. This commit record is then appended to the log.
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When an application server with the key-value runtime encounters the commit record during playing the log, it identifies a conflict window consists of all the log entries between the start log position of the transaction and the position of the commit record. The log entries in the conflict window therefore contain the key-value operations concurrent with the transaction submitting the commit record. The runtime further detects whether these concurrent operations contain the updates on the keys that belong to the read set of the transaction. If yes, the transaction is aborted, otherwise committed successfully.
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When an application server with the key-value runtime encounters the commit record during playing the log, it identifies a conflict window consisting of all the log entries between the start log position of the transaction and the position of the commit record. The log entries in the conflict window therefore contain the key-value operations concurrent with the transaction submitting the commit record. The runtime further detects whether these concurrent operations contain the updates on the keys belonging to the read set of the transaction. If yes, the transaction is aborted, otherwise committed successfully.
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<figure><img src="../../.gitbook/assets/zg-storage-transaction.png" alt=""><figcaption><p>Figure 1. Transaction Processing on 0G K-V Store</p></figcaption></figure>
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<figure><img src="../../.gitbook/assets/zg-storage-transaction.png" alt=""><figcaption><p>Figure 1. Transaction Processing on 0G K-V Store</p></figcaption></figure>
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## Concurrent Assumption
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## Concurrent Assumption
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This transaction model assumes that the transaction participants are collaborative and will honestly compose the commit record with the correct content. Although this assumption in a decentralized environment is too strong, it is still achievable for specific applications. For example, for an application like Google Docs, a user normally shares the access to others who can be trusted. In case this assumption cannot hold, the code of the transaction can be stored in ZeroGravity log and some mechanism of verifiable computation like zero-knowledge proof or hardware with trust execution environment (TEE) can be employed by the transaction executors to detect the validity of the commit record.
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This transaction model assumes that the transaction participants are collaborative and will honestly compose the commit record with the correct content. Although this assumption in a decentralized environment is too strong, it is still achievable for specific applications. For example, for an application like Google Docs, a user normally shares the access to others who can be trusted. In case this assumption cannot hold, the code of the transaction can be stored in the ZeroGravity log and some mechanism of verifiable computation like zero-knowledge proof or hardware with trust execution environment (TEE) can be employed by the transaction executors to detect the validity of the commit record.
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