bitcoinbook
Apache Impala
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| bitcoinbook | Apache Impala | |
|---|---|---|
| 347 | 1 | |
| 22,569 | 1,079 | |
| 1.1% | 1.5% | |
| 9.9 | 9.7 | |
| about 2 months ago | 3 days ago | |
| HTML | C++ | |
| GNU General Public License v3.0 or later | Apache License 2.0 |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
bitcoinbook
- Best Website for a noob to "learn bitcoin"?
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Free ebooks on Cryptocurrency, a small collection I read
"Mastering Bitcoin" by Andreas M. Antonopoulos: The printed version is not free, the complete text is available on GitHub. It's an excellent resource for understanding Bitcoin from a technical perspective.
- Writing a summary on HD wallets, first part done, correct so far ?
- Anything missing?
- Any good book about the math behind the encryption within Bitcoin?
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How do I find the target hash
The target is stored in the block header. You can see it in any block explorer labeled BITS or nBits. It is stored in a compressed format, as described in Mastering Bitcoin https://github.com/bitcoinbook/bitcoinbook/blob/develop/ch10.asciidoc Scroll down to "Target Representation"
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Free courses to learn about bitcoin and cryptocurrencies?
Mastering Bitcoin is a free book - https://github.com/bitcoinbook/bitcoinbook
- Wie funktionieren Finanzen?
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Seeking Guidance: Best Path to Mastering Blockchain and Affordable Master Programs
I also highly recommend that you Read this book "Mastering bitcoin", its free and open source: https://github.com/bitcoinbook/bitcoinbook
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Introducing Ledger Recover & Answering Your Questions
You should read this chapter - it kinda explains why the chip need to be able to manipulate and access the private key. It works exactly the same way for every hardware wallet.
Apache Impala
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Word-Aligned Bloom Filters
> whether this would really work out in most workloads
> just because it keeps the cache-lines hotter and less likely to be evicted.
Okay, so keeping cache for a bloom filter problem is real - but the real force evicting memory out of the cache line is the next row-group you read + all the other stuff you have to do when you implement this in a database product.
So the two things I work with, Apache Hive and Apache Impala switched to a blocked bloom filter at different points in time.
Hive BloomKFilter - https://github.com/apache/hive/blob/master/storage-api/src/j...
Impala/Kudu one - https://github.com/apache/impala/blob/master/be/src/kudu/uti...
The C++ one also has an AVX specialization, while the Java one relies on the JVM to do it (not always) - https://github.com/apache/impala/blob/master/be/src/kudu/uti...
We ran a lot of trivial benchmarks and several benchmarks where the shuffle-join (not sort-merge, this is just a partitioned hash join) generates a bloom filter (a semijoin) before sending rows out and the 1-cache line version won out when the bloom filter went slightly over the 1 Million + 5% rate [1].
The regular bloom filter went from (38ns -> 108ns for 1k -> 1m items), while the BloomK stuck at (27ns) despite making room for a million times more items in the bloom. The bloom-1 (which is the 64bit version) underperformed on accuracy (was ~2x faster at 16ns per op, but worse at filtering out items).
[1] - https://github.com/prasanthj/bloomfilter/tree/master/benchma...
What are some alternatives?
tatum-js - 🚀 Tatum SDK: A 💪 powerful, 🌟 feature-rich TypeScript/JavaScript 📚 library that streamlines the 🛠️ development of 🌐 blockchain applications.
ibis - the portable Python dataframe library
mempool - Explore the full Bitcoin ecosystem with mempool.space, or self-host your own instance with one-click installation on popular Raspberry Pi fullnode distros including Umbrel, Raspiblitz, Start9, and more!
seed_rl - SEED RL: Scalable and Efficient Deep-RL with Accelerated Central Inference. Implements IMPALA and R2D2 algorithms in TF2 with SEED's architecture.
Bitcoin - Bitcoin Core integration/staging tree
machin - Reinforcement learning library(framework) designed for PyTorch, implements DQN, DDPG, A2C, PPO, SAC, MADDPG, A3C, APEX, IMPALA ...
ethereumbook - Mastering Ethereum, by Andreas M. Antonopoulos, Gavin Wood
bloomfilter - BloomFilter implementation in Java that uses Murmur3 for fast hashing
bips - Bitcoin Improvement Proposals
Apache Hive - Apache Hive
bolts - BOLT: Basis of Lightning Technology (Lightning Network Specifications)
simdjson - Parsing gigabytes of JSON per second : used by Facebook/Meta Velox, the Node.js runtime, ClickHouse, WatermelonDB, Apache Doris, Milvus, StarRocks