sql2o
Presto
sql2o | Presto | |
---|---|---|
1 | 14 | |
1,132 | 15,591 | |
- | 0.4% | |
7.9 | 9.9 | |
18 days ago | 7 days ago | |
Java | Java | |
MIT License | Apache License 2.0 |
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sql2o
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Are there recommended approach working with Database except Panache/Hibernate ?
Mostly i think because in our Kubernetes - the max resources allocated for single service instance - 2gb ram + 4vcore (2vcore, for 4 there is special agreement process). Under load i often see high memory pressure (gc count, high pauses, etc.). But handling http requests and dealing with CRUD is not a big problem. The huge difference appears during data batch upload into big-data system. The only service which was able to upload it's database faster than 300k record/s+ (peak ingestion) is using https://github.com/aaberg/sql2o + https://vertx.io/docs/vertx-pg-client/java/ . I don't remember numbers for services which use hibernate, but they mostly are very low.
Presto
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Multi-Database Support in DuckDB
We have some of this functionality in Presto (https://github.com/prestodb/presto), but it takes fair bit of work to implement it for all the different backends.
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Rust std:fs slower than Python
Note that glibc has a similar problem in multithreaded contexts. It strands unused memory in thread-local pools, which grows your memory usage over time like a memory leak. We got lower memory usage that didn't grow over time by switching to jemalloc.
Example of this: https://github.com/prestodb/presto/issues/8993
- Ask HN: What are some SQL transpilers?
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Cheat sheet for quotes usage?
I look at the grammar. Here is preto's grammar which is mostly similar to other sql engines: https://github.com/prestodb/presto/blob/master/presto-parser/src/main/antlr4/com/facebook/presto/sql/parser/SqlBase.g4
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After a few recent events, opening a Linux terminal in public places is a big no-no
export MVNW_VERBOSE=true git clone https://github.com/prestodb/presto.git cd presto bash ./mvnw clean install
- presto: The official home of the Presto distributed SQL query engine for big data
- Compile the Minecraft Server (Java Edition) to Native with GraalVM Native Image
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What are y'all learning right now?
more specifically, recently started learning about Presto [paper], and have been diving deeper into [source] code.
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DeWitt Clause, or Can You Benchmark %DATABASE% and Get Away With It
Presto
- Let's write a compiler, part 5: A code generator
What are some alternatives?
JDBI - The Jdbi library provides convenient, idiomatic access to relational databases in Java and other JVM technologies such as Kotlin, Clojure or Scala.
Trino - Official repository of Trino, the distributed SQL query engine for big data, formerly known as PrestoSQL (https://trino.io)
jOOQ - jOOQ is the best way to write SQL in Java
Apache Phoenix - Apache Phoenix
HikariCP - 光 HikariCP・A solid, high-performance, JDBC connection pool at last.
Apache Calcite - Apache Calcite
H2 - H2 is an embeddable RDBMS written in Java.
Crate - CrateDB is a distributed and scalable SQL database for storing and analyzing massive amounts of data in near real-time, even with complex queries. It is PostgreSQL-compatible, and based on Lucene.
Querydsl - Unified Queries for Java
Spring Data JPA - Simplifies the development of creating a JPA-based data access layer.