MapDB VS H2

Compare MapDB vs H2 and see what are their differences.

MapDB

MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap-memory. It is a fast and easy to use embedded Java database engine. (by jankotek)

H2

H2 is an embeddable RDBMS written in Java. (by h2database)
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MapDB H2
5 11
4,982 4,385
0.0% 0.4%
0.0 8.8
about 1 year ago 3 months ago
Java Java
Apache License 2.0 GNU General Public License v3.0 or later
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
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.

MapDB

Posts with mentions or reviews of MapDB. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-10-27.
  • GC, hands off my data!
    6 projects | dev.to | 27 Oct 2023
    I decided to start with an overview of what open-source options are currently available. When it comes to the implementation of the on-heap cache mechanism, the options are numerous – there is well known: guava, ehcache, caffeine and many other solutions. However, when I began researching cache mechanisms offering the possibility of storing data outside GC control, I found out that there are very few solutions left. Out of the popular ones, only Terracotta is supported. It seems that this is a very niche solution and we do not have many options to choose from. In terms of less-known projects, I came across Chronicle-Map, MapDB and OHC. I chose the last one because it was created as part of the Cassandra project, which I had some experience with and was curious about how this component worked:
  • Permazen: Language-natural persistence to KV stores
    6 projects | news.ycombinator.com | 19 Sep 2023
    So, it's an object database, like Zope's ZODB on Python?

    I like the idea, but I'd like to learn about use cases for it.

    Otherwise, in Java, MapDB is about as far as I'd be willing to go: https://github.com/jankotek/mapdb/

  • what is the best persistent collection library?
    5 projects | /r/java | 2 Sep 2022
    Anyway, without further ado, I found MapDB (https://github.com/jankotek/mapdb) which does exactly that. Of course, they also provide their own Java collection implementations as well, so I suspect using it with Vavr would be a poor idea, but it is very cool in its own right anyway. Of course, there is also Apache Derby and HSQLDB, and those great options with a long history as well. I haven't played with these in a while though, so I might give them a try again soon for some personal stuff.
  • Ask HN: What are the best key-value self-hosted storage engines?
    5 projects | news.ycombinator.com | 31 Mar 2022
    In Java I like

    https://mapdb.org/

    It is more feature rich than you want but in Python I'd probably just use sqlite3 since it is in the standard library.

  • Solution for hash-map with >100M values
    7 projects | /r/java | 21 Dec 2020
    I have had good results with mapdb

H2

Posts with mentions or reviews of H2. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-07-18.
  • H2 Database – CVE getting flagged by automated scans
    2 projects | news.ycombinator.com | 18 Jul 2023
    The URL should point to a particular comment, but HN removes fragments: https://github.com/h2database/h2database/issues/3686#issueco...
  • “Our paying customers need X, when will you fix it?”
    5 projects | news.ycombinator.com | 15 Jul 2023
    This sounds very much like the idiocy of "infosec" lunkheads who know nothing about what they're "fixing" but if an automated system tells them a CVE exists, they've absolutely got to have it "patched". They don't look into what the claims of the CVE are, or whether their specific use case is vulnerable. They don't know, they don't care, they're not even programmers. All they know is a box needs ticking.

    A similar thing happened with h2database - a "security researcher" found that if you do something you're told not to do, then bad things happen.. but they demanded and got a CVE allocated anyway. Anyone who looks at it realises it's bullshit, but the mere existence of a CVE is all that matters to these idiots.

    What the h2database developer said about it: https://github.com/h2database/h2database/issues/3686#issueco...

    > I struggle to understand why I should feel the slightest shred of sympathy for "major corporations" that are using a volunteer-developed open-source project. Feel free to get your corporation to pay someone to deal with this, or pay for a similar commercial library.

  • SQLite Internals: How the Most Used Database Works
    4 projects | news.ycombinator.com | 19 Dec 2022
  • Database of Databases
    6 projects | dev.to | 23 Jun 2022
    H2 - Free, Embedded & Open source
  • 🎀 Spring Boot 2.7.0 Released
    7 projects | dev.to | 21 Jun 2022
    H2 2.1
  • How is the market for Kotlin developers where you live?
    10 projects | /r/Kotlin | 2 Mar 2022
    H2 for mocking relational database connections
  • Ask HN: Who wants to be hired? (December 2021)
    7 projects | news.ycombinator.com | 1 Dec 2021
  • Best Database option for a Swing application
    1 project | /r/learnjava | 25 Oct 2021
    It's open-source and written in Java, so you can even create custom procedures and register them straight in your application!
  • Reliable WebSockets-based pub/sub with Spring Boot
    5 projects | dev.to | 9 Apr 2021
    Firstly, let's set up a basic Spring Boot application. We can use the Spring Initializr with Spring Data JPA, H2 Database, Lombok added. H2 Database will provide us with a simple database, and Spring Data JPA will allow us to easily interact with it using Hibernate. Lombok will make it easier to write concise and readable classes.
  • Why are tar.xz files 15x smaller when using Python's tar compared to macOS tar?
    2 projects | news.ycombinator.com | 14 Mar 2021
    Sorting chunks by similarity: commonly used tools don't do that. Most archive tools only sort by file type.

    I wrote a tool that chunks the data (into variable-sized blocks, to re-sync if there are multiple files that have different length prefixes, but that's another story), and then sorts the chunks by LSH (locality sensitive hash). LSH is used by search engines to detect similar text. It can compress directories that contain multiple version of e.g. source code very well (e.g. trunk, branches). https://github.com/h2database/h2database/blob/master/h2/src/...

    I discussed this approach with a researcher in this area in January 2020. AFAIK there is active research in this area, specially to compress DNA sequences. But he also wasn't aware of papers or research in this area for general-purpose data compression.

    So, I think this area is largely uncharted. I would be interested (as a hobby side project) to help, if somebody is interested.

What are some alternatives?

When comparing MapDB and H2 you can also consider the following projects:

Chronicle Map - Replicate your Key Value Store across your network, with consistency, persistance and performance.

JetBrains Xodus - Transactional schema-less embedded database used by JetBrains YouTrack and JetBrains Hub.

OrientDB - OrientDB is the most versatile DBMS supporting Graph, Document, Reactive, Full-Text and Geospatial models in one Multi-Model product. OrientDB can run distributed (Multi-Master), supports SQL, ACID Transactions, Full-Text indexing and Reactive Queries.

Exposed - Kotlin SQL Framework

MariaDB4j - MariaDB Embedded in Java JAR

InfluxDB – Built for High-Performance Time Series Workloads
InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
www.influxdata.com
featured
Stream - Scalable APIs for Chat, Feeds, Moderation, & Video.
Stream helps developers build engaging apps that scale to millions with performant and flexible Chat, Feeds, Moderation, and Video APIs and SDKs powered by a global edge network and enterprise-grade infrastructure.
getstream.io
featured

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