为什么Filecoin选择用“存储证明” (Proof-of-Storage),而不是“权益证明”(Proof-of-Stake)?

  • Filecoin使用存储证明 (Proof-of-Storage)共识协议,因为它简单,能协调利益,并促使矿工以有竞争力的价格提供真实的新增的存储容量。 在开发一种我们称之为复制证据(Proof-of-Replication)的新型存储证明(Proof-of-Storage) 时,我们将使矿工的存储设备包含有用的数据,使其成为网络的一个宝贵资源。 权益证明是我们正密切关注的一个很有意思的研究领域。

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  • X

    It has come to my attention that storage clients wish to obtain the CommD and CommR associated with the sector into which the piece referenced in their storage deal has been sealed. The client can already use the query-deal command to obtain the CID of the commitSector message corresponding to that sector - but message wait doesn't show individual commitSector arguments - it just shows some string encoding of the concatenated arguments' bytes.
    I propose to augment the ProofInfo struct with CommR and CommD such that the storage client can query for their deal and, when available, see the replica and data commitments in the query-storage-deal command. Alternatively, the query-storage-deal code could get deal state from the miner and use the CommitmentMessage CID to look up CommR and CommD (on chain) - but this seems like more work than is really necessary.

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  • X

    Hmmmm. These are just my thoughts off the cuff:

    For straight-ahead performance that's not specifically concerned with the issue of loading the data (from wherever), then work on smaller (1GiB) sectors is okay. When considering optimization for space so that large sectors can be replicated, 128GB for >1GiB sectors is obviously problematic from a normal replication perspective. However, if we consider the attacker who wants to replicate fast at any cost, then maybe it's okay.
    Based on this, we could probably focus on smaller sectors as a reasonable representation of the problem. This has the unfortunate consequence that the work is less applicable to the related problem of speeding replication even when memory must be conserved to some extent.
    I guess as a single datum to help calibrate our understanding of how R2 scales, it would be worth knowing exactly how much RAM is required for both 1GiB and (I guess) 2GiB. If the latter really fails with 128GB RAM, how much does it require not to? If the work you're already doing makes it easy to get this information, it might help us reason through this. I don't think you should spend much time or go out of your way to perform this investigation though, otherwise.
    Others may feel differently about any of this.

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  • X

    @xiedapao
    If there does exist such a thing, I cannot find it.

    zenground0 [7 hours ago]
    I don't believe there is

    zenground0 [7 hours ago]
    tho maybe phritz has some "refactor the vm" issues that are relevant

    laser [7 hours ago]
    I assert to you that we must create an InitActor in order for CreateStorageMiner conform to the specification.

    Why [7 hours ago]
    I’ll take things I don’t disagree with for $400 Alex

    zenground0 [7 hours ago]
    Agreement all around. However this is one of those changes that is pretty orthogonal to getting the storage protocol to work and something we can already do. We need to track it but I see it as a secondary priority to (for example) getting faults or arbitrating deals working.

    anorth [3 hours ago]
    Thanks @zenground0, I concur. Init actor is in our high-level backlog, but I'm not surprised there's no issue yet. Is it reasonable to draw our boundary there for now?

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  • X

    Does there already exist a story which addresses the need to create an InitActor?

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