neptune | Rust Poseidon implementation | GPU library
kandi X-RAY | neptune Summary
kandi X-RAY | neptune Summary
Neptune is a Rust implementation of the Poseidon hash function tuned for Filecoin. Neptune has been audited by ADBK Consulting and deemed fully compliant with the paper (Starkad and Poseidon: New Hash Functions for Zero Knowledge Proof Systems). Neptune is specialized to the BLS12-381 curve. Although the API allows for type specialization to other fields, the round numbers, constants, and s-box selection may not be correct. Do not do this. Hashes of arbitrary arities are generally supported — but secure round numbers have only been calculated for a selection (including especially 2, 4, and 8 — which are explicitly, rather than incidentally, supported). Filecoin Proofs make heavy use of 8-ary merkle trees and merkle inclusion proofs (in SNARKs). At the time of the 1.0.0 release, Neptune on RTX 2080Ti GPU can build 8-ary Merkle trees for 4GiB of input in 16 seconds.
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Trending Discussions on neptune
QUESTION
I have a graph with one start-node and two goal-vetices. Two paths lead to the first goal, another path to the second. I look for all paths to the goals vertices and collect the edge weights (sack(sum)). I add the sum of all paths leading to the same goal via group().by().
query so far:
...ANSWER
Answered 2022-Feb-23 at 14:38You just need to select the date
key from the map
map.
QUESTION
I have a graph on Neptune and I used OpenCypher to query on it.
At the middle of the graph I have a big connected nodes, at the edges you can see that I have some single nodes/ nodes that connected only to 1-5 other nodes. (see on the picture)
I want to get all of them, there is an option to do so?
I tried to think about options like take a random Id from the center and check all the nodes that don't have a path from them to this node, or maybe say get a table with all nodes and number of connected nodes to them, and ask for all nodes that not contain more than 10 nodes connected
but I didn't find a way to write this query, Must to know that opencypher on Neptune not contains all the magic keys like 'all' predicate function, so need to find a way with the functions that neptune support
...ANSWER
Answered 2022-Feb-07 at 15:08Ideally, you would want to run Weakly Connected Components algorithm to identify the largest component and then return all nodes that are not part of it. It seems that Neptune doesn't support that algorithm out-of-the-box, but you could implement it with gremlin as discussed in another SO question: Find largest connected components AWS Neptune
QUESTION
We use Neo4j AuraDB for our graph database but there we have issues with data upload. So, we decided to move to AWS Neptune using the migration tool.
We have 3.7M nodes and 11.2M relations in our database. The DB instance is db.r5.large with 2 CPUs and 16GiB RAM.
The same AWS Neptune OpenCypher queries are much slower than AuraDB Cypher queries (about 7-10 times slower). Also, we tried to rewrite the queries to Gremlin and test performance but it is still very slow. We have node and lookup indexes on AuraDB but we can't create them on AWS Neptune as it handles them automatically.
Is there any way to reach better performance on AWS Neptune?
UPDATE:
Example of Gremlin query:
g.V().hasLabel('Member').has('address', eq('${address}')).outE('HAS').as('member_has').inV().as('token').hasLabel('Token').inE('HAS').as('other_member_has').outV().as('other_member').hasLabel('Member').where(__.select('member_has').where(neq('other_member_has'))).select('other_member', 'token').group().by(__.select('other_member').local(__.properties().group().by(__.key()).by(__.map(__.value())))).by(__.fold().project('member', 'number_of_tokens').by(__.unfold().select('other_member').choose(neq('cypher.null'), __.local(__.properties().group().by(__.key()).by(__.map(__.value()))))).by(__.unfold().select('token').count())).unfold().select(values).order().by(__.select('number_of_tokens'), desc).limit(20)
Example of Cypher query:
MATCH (member:Member { address: '${address}' })-[:HAS]->(token:Token)<-[:HAS]-(other_member:Member) RETURN PROPERTIES(other_member) as member, COUNT(token) AS number_of_tokens ORDER BY number_of_tokens DESC LIMIT 20
ANSWER
Answered 2022-Feb-01 at 14:30As discussed in the comments, as of this moment, the openCypher support is a preview, not quite GA level. The more recent engine versions do have some significant improvements but more are yet to be delivered. As to the Gremlin query, tools that convert Cypher to Gremlin tend to build quite complex queries. I think the Gremlin equivalent to the Cypher query is going to look something like this.
QUESTION
ANSWER
Answered 2022-Jan-14 at 17:56There are some ways to fix your problem, but the most simplest way is to put them in an array like this:
QUESTION
This is my first stack overflow question, so if I am presenting something wrong, please let me know. I am pretty new to computer programming, so I just have a small webpage where I am just implementing things that I am learning.
I made a little quiz with random trivia multiple choice questions you can take if you press a button. I am using window prompts to ask the questions and get the answers, and I have all of the questions and answers stored as objects with question/prompt and answer pairs. All of those objects are stored in an array in a variable called shortQuizPrompts. I already have the quiz working and everything, aka., It tells you after every question if you got the answer to that question right or wrong, and it gives you a grade afterwards... I also have it set up so that if you enter an answer that is not "a", "b", "c", or "d", it lets you know that it isnt a valid answer. Those sorts of things.
As of right now, you can choose how many questions long you want the quiz to be out of the 24 total questions I have so far. It just asks the questions in the order that they are stored in the array. For example, you will never be asked the last question in the array if you do not choose for the quiz to be the full 24 questions long. However, I want to make the quiz ask the questions in a random order, while also removing those questions from the array as to not ask the same question multiple times.
I have tried increasing the iterator while looping through the array to a random number from 0 to the length of however many questions they chose. Then checking to see if the iterator was larger than the length of the number of questions they chose, it would decrease the iterator until it found a question that is still in the array that it could ask...
If anyone knows how to go about doing that, it would be great. Sorry for the long question btw. I am pretty new to coding, so this is probably a simple answer, but I digress. I'm pretty sure I did everything right. Thx.
...ANSWER
Answered 2022-Jan-12 at 01:03You can shuffle the shortQuizPrompts
array before starting the quiz. Array shuffle details can be found in this answer.
QUESTION
When Neptune perform a query, I expected Neptune pull the vertex and edge data out from volume storage, and then put these data into memory. How long does Neptune keep these data in memory?
...ANSWER
Answered 2021-Dec-20 at 17:22It's hard to give an exact answer to that due to the way the buffer cache in Amazon Neptune works. Amazon Neptune uses ~2/3 of the memory of any specific instance for buffer cache. When a value is needed, Neptune first checks the buffer cache and if it is not there, then it loads the page into memory (each page is 16kB). Once the buffer cache fills up Neptune will evict the least recently used page from the cache.
QUESTION
I have some entries inside the graph that I am searching (e.g. hello_world
, foo_bar_baz
) and I want to be able to search "hello" and get hello_world back.
Currently, I will only get a result if I search the entire string (i.e. searching hello_world
or foo_bar_baz
)
This seems to be due to elasticsearch's standard analyzer behaviour but I don't know how to deal with this with Neptune.
...ANSWER
Answered 2021-Dec-15 at 20:27One way is to use a wild card.
Given:
QUESTION
%%gremlin -g Datagroup
...ANSWER
Answered 2021-Dec-10 at 14:46You can have different colors, or even icons for the nodes, assigned. There are examples in the sample notebooks that are part of the graph-notebook project. For example if you look in the /Neptune/02-Visualization/Grouping-and-Appearance-Customization-Gremlin
notebook, you will see this example:
QUESTION
What is the correct way to store date/time stamp in a gremlin-based database like Amazon Neptune?
When I try the following in python
...ANSWER
Answered 2021-Dec-04 at 16:41Neptune will convert Python dates into an appropriate internal form and you can do evaluations directly on the dates. Here is a set of examples. You do not need to (and should not) cast to strings. An alternative is to store epoch offset integers but in the case of Neptune, using the native Python dates will be slightly more efficient in terms of how the computations are performed. You should check the documentation for each database you may use but in the case of Neptune using the native Python datetime
is the best way to go.
QUESTION
I'm trying to run a MERGE
query against an AWS Neptune database using their new OpenCypher implementation but MERGE
is not yet supported as a clause.
Is there a way to get the behaviour of a MERGE
without using a MERGE
in Neptune's OpenCypher implementation?
I'm hoping it's possible to do something like:
...ANSWER
Answered 2021-Nov-24 at 17:51openCypher does not provide a robust capability to perform the type of logic in a query that you show in your pseudocode. Until MERGE
is a supported clause in AWS Neptune the best way to achieve this functionality is to use the Gremlin pattern for this as described here. Neptune provides the ability to use both openCypher and Gremlin (via drivers or over HTTPS) on property graph data stored in Neptune. For your pseudo code above the Gremlin equivalent would look like this:
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Rust is installed and managed by the rustup tool. Rust has a 6-week rapid release process and supports a great number of platforms, so there are many builds of Rust available at any time. Please refer rust-lang.org for more information.
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