A fast ordered NoSQL database.

Last update: Sep 29, 2022

Related tags

Overview

MerkavaDB

Note

This is still in active development. Things will change. If you are interested in helping out, or would like to see any particular features added, let me know.

What is MerkavaDB?

A fast, and lightweight DB for storing ordered data. The order it comes out is the order that it went in. The API is meant to be small and without bloated queries. Consequently, there is a limited set of queries to be made since the primary tool is getting objects in and out of storage in a specific order.

So, why would I use it?

Because it is fast. And it is simple.

Let's say you want to have a chat or a news feed. The data will ALWAYS be displayed in the same order. Why not persist your data objects in the order you want them in?

MerkavaDB stores whatever data you need it to. It is schemaless. If you can transfer it, it will store.

How do I use it?

By making TCP connection to the database server. All you need to do is specify a "channel" and some data. The protocol is simple:

\n

Note, the line break at the end of the message is critical. As is the single spacing.

Your response will be:

OK 
  

or

ER

What is a channel?

A channel is a division of data. All data is stored in a sequential order for a given channel. For example, it could be a single chat room or news feed.

Supported Operations

PUSH - add a new item to the channel
RETRIEVE - get a single item by id from the channel
RECENT - get ``n` items from the channel
UPDATE - change a single item
DELETE - remove an item from a channel (not yet implemented)
RESTORE - return a deleted item to the channel (not yet implemented)
PURGE - cleanup all deleted items (not yet implemented)
FLUSH - empty a channel
BACKUP - persist a channel to disk
STATS - receive information and stats about a channel

Examples

foo PUSH this is a message

foo RECENT

foo RECENT 5 5 most recent messages

foo RECENT 5 2 5 most recent messages, offset by 2

foo RETRIEVE EaR1US7HVN6xuSG-2SgJtA

foo STATS

Roadmap

There currently is a proof of concept implementation out there. It is being rebuilt from the ground up in Rust. More to come later.

Comments

Bump tokio from 0.1.22 to 1.8.4
Bumps tokio from 0.1.22 to 1.8.4.

Release notes

Sourced from tokio's releases.

Tokio v1.8.4

1.8.4 (November 15, 2021)

This release backports a bugfix for a data race when sending and receiving on a closed oneshot channel ([RUSTSEC-2021-0124]) from v1.13.1.

Fixed

sync: fix a data race between oneshot::Sender::send and awaiting a oneshot::Receiver when the oneshot has been closed (#4226)

Tokio v1.8.3

1.8.3 (July 22, 2021)

This release backports two fixes from 1.9.0

Fixed

Fix leak if output of future panics on drop (#3967)

Fix leak in LocalSet (#3978)

#3967: tokio-rs/tokio#3967 #3978: tokio-rs/tokio#3978

Tokio 1.8.2

Fixes a missed edge case from 1.8.1.

Fixed

runtime: drop canceled future on next poll (#3965)

Tokio 1.8.1

Forward ports 1.5.1 fixes.

Fixed

runtime: remotely abort tasks on JoinHandle::abort (#3934)

#3934: tokio-rs/tokio#3934

tokio-1.8.0

1.8.0 (July 2, 2021)

Added

io: add get_{ref,mut} methods to AsyncFdReadyGuard and AsyncFdReadyMutGuard (#3807)

io: efficient implementation of vectored writes for BufWriter (#3163)

net: add ready/try methods to NamedPipe{Client,Server} (#3866, #3899)

sync: add watch::Receiver::borrow_and_update (#3813)

sync: implement From<T> for OnceCell<T> (#3877)

... (truncated)

Commits

2273eb1 chore: fix CI on master (#4008)

249f05c chore: fix output of macro after new rustc release (#4189)

2bf6132 macros: fix type resolution error in #[tokio::main] (#4176)

c9228bf macros: make tokio-macros attributes more IDE friendly (#4162)

441427c macros: fix wrong error messages (#4067)

cc7d9e1 chore: explicitly relaxed clippy lint for runtime entry macro (#4030)

f49b7fc tokio-macros: compat with clippy::unwrap_used (#3926)

ea87e4e net: fix the uds_datagram tests with the latest nightly stdlib (#3952)

e2e7b5e examples: replace time crate with httpdate (#4169)

9a58f7f tests: update Nix to 0.22.0 (#3951)

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dependencies
opened by dependabot[bot] 1
Bump regex from 1.5.4 to 1.5.6
Bumps regex from 1.5.4 to 1.5.6.

Changelog

Sourced from regex's changelog.

1.5.6 (2022-05-20)

This release includes a few bug fixes, including a bug that produced incorrect matches when a non-greedy ? operator was used.

[BUG #680](rust-lang/regex#680): Fixes a bug where [[:alnum:][:^ascii:]] dropped [:alnum:] from the class.

[BUG #859](rust-lang/regex#859): Fixes a bug where Hir::is_match_empty returned false for \b.

[BUG #862](rust-lang/regex#862): Fixes a bug where 'ab??' matches 'ab' instead of 'a' in 'ab'.

1.5.5 (2022-03-08)

This releases fixes a security bug in the regex compiler. This bug permits a vector for a denial-of-service attack in cases where the regex being compiled is untrusted. There are no known problems where the regex is itself trusted, including in cases of untrusted haystacks.

SECURITY #GHSA-m5pq-gvj9-9vr8: Fixes a bug in the regex compiler where empty sub-expressions subverted the existing mitigations in place to enforce a size limit on compiled regexes. The Rust Security Response WG published an advisory about this: https://groups.google.com/g/rustlang-security-announcements/c/NcNNL1Jq7Yw

Commits

9aef5b1 1.5.6

2931b07 syntax: bump minimum regex-syntax version to 0.6.26

b41bde0 regex-syntax-0.6.26

d98da65 changelog: 1.5.6

1c19619 syntax: fix literal extraction for 'ab??'

88a2a62 syntax: fix 'is_match_empty' predicate

72f09f1 syntax: fix ascii class union bug

b537286 doc: fix some typos

258bdf7 changelog: 1.5.5

d130381 1.5.5

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dependencies
opened by dependabot[bot] 0
Bump crossbeam-deque from 0.7.3 to 0.7.4
Bumps crossbeam-deque from 0.7.3 to 0.7.4.

Changelog

Sourced from crossbeam-deque's changelog.

Version 0.8.1

Support targets that do not have atomic CAS on stable Rust (#698)

Version 0.8.0

Bump the minimum supported Rust version to 1.36.

Bump crossbeam-channel to 0.5.

Bump crossbeam-deque to 0.8.

Bump crossbeam-epoch to 0.9.

Bump crossbeam-queue to 0.3.

Bump crossbeam-utils to 0.8.

Commits

0485137 Prepare for the next release

180b462 Fix deque steal race condition

48b13dc Bump crossbeam-channel to v0.4.4

679dac8 Bump crossbeam-channel to v0.4.3

f652c6a Change crossbeam-channel's license to MIT OR Apache-2.0.

149a3c9 Release crossbeam-queue 0.2.3

18363b5 Merge #476

e32c891 Release new versions

6d6591a Merge #474

528c3ca Undo bump of rand as it bumps MSRV

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dependencies
opened by dependabot[bot] 0
Initial Update

The bot created this issue to inform you that pyup.io has been set up on this repo. Once you have closed it, the bot will open pull requests for updates as soon as they are available.

opened by pyup-bot 0
Bump tokio from 1.8.4 to 1.18.4
Bumps tokio from 1.8.4 to 1.18.4.

Release notes

Sourced from tokio's releases.

Tokio v1.18.3

1.18.3 (September 27, 2022)

This release removes the dependency on the once_cell crate to restore the MSRV of the 1.18.x LTS release. (#5048)

#5048: tokio-rs/tokio#5048

Tokio v1.18.2

1.18.2 (May 5, 2022)

Add missing features for the winapi dependency. (#4663)

#4663: tokio-rs/tokio#4663

Tokio v1.18.1

1.18.1 (May 2, 2022)

The 1.18.0 release broke the build for targets without 64-bit atomics when building with tokio_unstable. This release fixes that. (#4649)

#4649: tokio-rs/tokio#4649

Tokio v1.18.0

1.18.0 (April 27, 2022)

This release adds a number of new APIs in tokio::net, tokio::signal, and tokio::sync. In addition, it adds new unstable APIs to tokio::task (Ids for uniquely identifying a task, and AbortHandle for remotely cancelling a task), as well as a number of bugfixes.

Fixed

blocking: add missing #[track_caller] for spawn_blocking (#4616)

macros: fix select macro to process 64 branches (#4519)

net: fix try_io methods not calling Mio's try_io internally (#4582)

runtime: recover when OS fails to spawn a new thread (#4485)

Added

net: add UdpSocket::peer_addr (#4611)

net: add try_read_buf method for named pipes (#4626)

signal: add SignalKind Hash/Eq impls and c_int conversion (#4540)

signal: add support for signals up to SIGRTMAX (#4555)

sync: add watch::Sender::send_modify method (#4310)

sync: add broadcast::Receiver::len method (#4542)

sync: add watch::Receiver::same_channel method (#4581)

sync: implement Clone for RecvError types (#4560)

Changed

... (truncated)

Commits

9241c3e chore: prepare Tokio v1.18.4 release

699573d net: fix named pipes server configuration builder

5c76d07 chore: prepare Tokio v1.18.3 (#5051)

05e6614 chore: don't use once_cell for 1.18.x LTS release (#5048)

7aa1566 chore: prepare Tokio v1.18.2

7c8e552 windows: add features for winapi (#4663)

148bea8 tokio: prepare Tokio v1.18.1 (#4650)

dc54aec metrics: use mocked AtomicU64 in IO metrics driver (#4649)

fa665b9 macros: always emit return statement (#4636)

4818343 tokio: prepare to release v1.18.0 (#4641)

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dependencies
opened by dependabot[bot] 0

Releases(v0.3.0)

v0.3.0(Mar 21, 2018)

Source code(tar.gz)
Source code(zip)

Owner

Adam Hopkins

the brew·mas·ter (noun) /bro͞o ˈmastər/

GitHub Repository

A fast ordered NoSQL database.

Related tags

Overview

MerkavaDB

What is MerkavaDB?

So, why would I use it?

How do I use it?

What is a channel?

Supported Operations

Examples

Roadmap

Comments

Bump tokio from 0.1.22 to 1.8.4

Tokio v1.8.4

1.8.4 (November 15, 2021)

Fixed

Tokio v1.8.3

1.8.3 (July 22, 2021)

Fixed

Tokio 1.8.2

Fixed

Tokio 1.8.1

Fixed

tokio-1.8.0

1.8.0 (July 2, 2021)

Added

Bump regex from 1.5.4 to 1.5.6

1.5.6 (2022-05-20)

1.5.5 (2022-03-08)

Bump crossbeam-deque from 0.7.3 to 0.7.4

Version 0.8.1

Version 0.8.0

Initial Update

Bump tokio from 1.8.4 to 1.18.4

Tokio v1.18.3

1.18.3 (September 27, 2022)

Tokio v1.18.2

1.18.2 (May 5, 2022)

Tokio v1.18.1

1.18.1 (May 2, 2022)

Tokio v1.18.0

1.18.0 (April 27, 2022)

Fixed

Added

Changed

Releases(v0.3.0)

v0.3.0(Mar 21, 2018)

Owner

Adam Hopkins

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