|Project Name||Stars||Downloads||Repos Using This||Packages Using This||Most Recent Commit||Total Releases||Latest Release||Open Issues||License||Language|
|Dolt||14,938||2||a day ago||214||May 19, 2022||292||apache-2.0||Go|
|Dolt – Git for Data|
|Waking Up||8,405||4 months ago||19||gpl-3.0|
|Versionpress||2,553||6 months ago||232||PHP|
|Git-based version control for WordPress. Whoa!|
|Irmin||1,697||13 days ago||2||March 30, 2022||139||isc||OCaml|
|Irmin is a distributed database that follows the same design principles as Git|
|Learn Devops||1,097||2 days ago||1||HCL|
|I am using this repository to document my devops journey. I follow the process of learning everything by tasks. Every task has an associated objective that encompasses an underlying concept. Concepts including CloudProviders, Containers, ContainersOrchestration, Databases, InfrastructureAsCode, Interview, VersionControl etc in progress|
|Datakit||999||a year ago||34||apache-2.0||OCaml|
|Connect processes into powerful data pipelines with a simple git-like filesystem interface|
|Visualise a git repository by diff activity|
|a git-backed issue tracker|
|Redwood||749||2||4 months ago||26||April 18, 2021||111||mit||Go|
|A highly-configurable, distributed, realtime database that manages a state tree shared among many peers.|
|Gitmodel||542||7||1||3 years ago||8||September 30, 2012||9||mit||Ruby|
|An ActiveModel-compliant persistence framework for Ruby that uses Git for versioning and remote syncing.|
Irmin is based on distributed version-control systems (DVCs), extensively used in software development to enable developers to keep track of change provenance and expose modifications in the source code. Irmin applies DVC's principles to large-scale distributed data and exposes similar functions to Git (clone, push, pull, branch, rebase). It is highly customizable: users can define their types to store application-specific values and define custom storage layers (in memory, on disk, in a remote Redis database, in the browser, etc.). The Git workflow was initially designed for humans to manage changes within source code. Irmin scales this to hanlde automatic programs performing a very high number of operations per second, with a fully automated handling of update conflicts. Finally, Irmin exposes an event-driven API to define programmable dynamic behaviours and to program distributed dataflow pipelines.
Irmin was created at the University of Cambridge in 2013 to be the default storage layer for MirageOS applications (both to store and orchestrate unikernel binaries and the data that these unikernels are using). As such, Irmin is not, strictly speaking, a complete database engine. Instead, similarly to other MirageOS components, it is a collection of libraries designed to solve different flavours of the challenges raised by the CAP Theorem. Each application can select the right combination of libraries to solve its particular distributed problem.
Irmin consists of a core of well-defined low-level data structures that specify how data should be persisted and be shared across nodes. It defines algorithms for efficient synchronization of those distributed low-level constructs. It also builds a collection of higher-level data structures that developers can use without knowing precisely how Irmin works underneath. Some of these components even have a formal semantics, including Conflict-free Replicated Data-Types (CRDT). Since it's a part of MirageOS, Irmin does not make strong assumptions about the OS environment that it runs in. This makes the system very portable: it works well for in-memory databases and slower persistent serialization such as SSDs, hard drives, web browser local storage, or even the Git file format.
Irmin is primarily developed and maintained by Tarides, with contributions from many contributors from various organizations. External maintainers and contributors are welcome.
irmin-gituses an on-disk format that can be inspected and modified using Git
API documentation can be found online at https://mirage.github.io/irmin
Please ensure to install the minimum
ocaml versions. Find the latest
version and install instructions on ocaml.org.
To install Irmin with the command-line tool and all unix backends using
opam install irmin-cli
A minimal installation containing the reference in-memory backend can be installed by running:
opam install irmin
The following packages have are available on
irmin- the base package, plus an in-memory storage implementation
irmin-chunk- chunked storage
irmin-cli- a simple command-line tool
irmin-fs- filesystem-based storage using
irmin-git- Git compatible storage
irmin-graphql- GraphQL server
irmin-http- a simple REST interface
irmin-mirage- mirage compatibility
irmin-mirage-git- Git compatible storage for mirage
irmin-mirage-graphql- mirage compatible GraphQL server
irmin-pack- compressed, on-disk, posix backend
ppx_irmin- PPX deriver for Irmin content types (see README_PPX.md)
irmin-containers- collection of simple, ready-to-use mergeable data structures
To install a specific package, simply run:
opam install <package-name>
To install the development version of Irmin in your current
opam switch, clone
this repository and
opam install the packages inside:
git clone https://github.com/mirage/irmin cd irmin/ opam install .
Below is a simple example of setting a key and getting the value out of a Git-based, filesystem-backed store.
open Lwt.Syntax (* Irmin store with string contents *) module Store = Irmin_git_unix.FS.KV (Irmin.Contents.String) (* Database configuration *) let config = Irmin_git.config ~bare:true "/tmp/irmin/test" (* Commit author *) let author = "Example <[email protected]>" (* Commit information *) let info fmt = Irmin_git_unix.info ~author fmt let main = (* Open the repo *) let* repo = Store.Repo.v config in (* Load the main branch *) let* t = Store.main repo in (* Set key "foo/bar" to "testing 123" *) let* () = Store.set_exn t ~info:(info "Updating foo/bar") [ "foo"; "bar" ] "testing 123" in (* Get key "foo/bar" and print it to stdout *) let+ x = Store.get t [ "foo"; "bar" ] in Printf.printf "foo/bar => '%s'\n" x (* Run the program *) let () = Lwt_main.run main
The example is contained in examples/readme.ml It can be compiled and executed with dune:
$ dune build examples/readme.exe $ dune exec examples/readme.exe foo/bar => 'testing 123'
The examples directory also contains more advanced examples, which can be executed in the same way.
The same thing can also be accomplished using
irmin, the command-line
application installed with
irmin-cli, by running:
$ echo "root: ." > irmin.yml $ irmin init $ irmin set foo/bar "testing 123" $ irmin get foo/bar testing 123
irmin.yml allows for
irmin flags to be set on a per-directory basis. You
can also set flags globally using
irmin help irmin.yml for further details.
irmin --help for list of all commands and either
irmin <command> --help or
irmin help <command> for more help with a
Irmin's initial desing is directly inspired from XenStore, with:
In 2014, the first release of Irmin was announced part of the MirageOS 2.0 release here. Since then, several projects started using and improving Irmin. These can roughly be split into 3 categories: (i) use Irmin as a portable, structured key-value store (with expressive, mergeable types); (ii) use Irmin as distributed database (with a customizable consistency semantics) and (iii) an event-driven dataflow engine.
Feel free to report any issues using the GitHub bugtracker.
See the LICENSE file.
Development of Irmin was supported in part by the EU FP7 User-Centric Networking project, Grant No. 611001.