From: Johnson Lau <jl2012@xbt•hk>
To: Tomas <tomas@tomasvdw•nl>
Cc: bitcoin-dev <bitcoin-dev@lists•linuxfoundation.org>
Subject: Re: [bitcoin-dev] Using a storage engine without UTXO-index
Date: Sun, 9 Apr 2017 04:21:04 +0800 [thread overview]
Message-ID: <DF7A05F0-4EA7-4CB3-A9BE-491BDA209EF7@xbt.hk> (raw)
In-Reply-To: <1491681378.2454247.938587616.7199D633@webmail.messagingengine.com>
> On 9 Apr 2017, at 03:56, Tomas <tomas@tomasvdw•nl> wrote:
>
>
>> I don’t fully understand your storage engine. So the following deduction
>> is just based on common sense.
>>
>> a) It is possible to make unlimited number of 1-in-100-out txs
>>
>> b) The maximum number of 100-in-1-out txs is limited by the number of
>> previous 1-in-100-out txs
>>
>> c) Since bitcrust performs not good with 100-in-1-out txs, for anti-DoS
>> purpose you should limit the number of previous 1-in-100-out txs.
>>
>> d) Limit 1-in-100-out txs == Limit UTXO growth
>>
>> I’m not surprised that you find an model more efficient than Core. But I
>> don’t believe one could find a model that doesn’t become more efficient
>> with UTXO growth limitation.
>
> My efficiency claims are *only* with regards to order validation. If we
> assume all transactions are already pre-synced and verified, bitcrust's
> order validation is very fast, and (only slightly) negatively effected
> by input-counts.
pre-synced means already in mempool and verified? Then it sounds like we just need some mempool optimisation? The tx order in a block is not important, unless they are dependent
>
>> One more question: what is the absolute minimum disk and memory usage in
>> bitcrust, compared with the pruning mode in Core?
>
> As bitcrust doesn't support this yet, I cannot give accurate numbers,
> but I've provided some numbers estimates earlier in the thread.
>
>
> Rereading my post and these comments, I may have stepped on some toes
> with regards to SegWit's model. I like SegWit (though I may have a
> slight preference for BIP140), and I understand the reasons for the
> "discount", so this was not my intention. I just think that the reversal
> of costs during peak load order validation is a rather interesting
> feature of using spend-tree based validation.
>
> Tomas
Please no conspiracy theory like stepping on someone’s toes. I believe it’s always nice to challenge the established model. However, as I’m trying to make some hardfork design, I intend to have a stricter UTXO growth limit. As you said "protocol addressing the UTXO growth, might not be worth considering protocol improvements*, it sounds like UTXO growth limit wouldn’t be very helpful for your model, which I doubt.
next prev parent reply other threads:[~2017-04-08 20:21 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-06 22:12 Tomas
2017-04-06 23:38 ` Eric Voskuil
2017-04-07 0:17 ` Tomas
2017-04-08 22:37 ` Eric Voskuil
2017-04-08 23:58 ` Tomas
2017-04-11 1:44 ` Eric Voskuil
2017-04-11 8:43 ` Tomas
2017-04-11 9:41 ` Eric Voskuil
2017-04-11 10:04 ` Tomas
[not found] ` <CAAS2fgTEMCkDWdhCWt1EsUrnt3+Z_8m+Y1PTsff5Rc0CBnCKWQ@mail.gmail.com>
2017-04-07 0:48 ` Tomas
2017-04-07 1:09 ` Gregory Maxwell
2017-04-07 1:29 ` Tomas
2017-04-07 18:52 ` Tom Harding
2017-04-07 19:42 ` Gregory Maxwell
2017-04-08 18:27 ` Tom Harding
2017-04-08 19:23 ` Tomas
2017-04-07 7:55 ` Marcos mayorga
2017-04-07 8:47 ` Tomas
2017-04-07 14:14 ` Greg Sanders
2017-04-07 16:02 ` Tomas
2017-04-07 18:18 ` Gregory Maxwell
2017-04-07 18:39 ` Bram Cohen
2017-04-07 19:55 ` Eric Voskuil
2017-04-07 21:44 ` Tomas
2017-04-07 23:51 ` Eric Voskuil
2017-04-07 21:14 ` Tomas
2017-04-08 0:44 ` Gregory Maxwell
2017-04-08 7:28 ` Tomas
2017-04-08 19:23 ` Johnson Lau
2017-04-08 19:56 ` Tomas
2017-04-08 20:21 ` Johnson Lau [this message]
2017-04-08 20:42 ` Tomas
2017-04-08 22:12 ` Gregory Maxwell
2017-04-08 22:34 ` Tomas
2017-04-08 21:22 ` Troy Benjegerdes
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