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# Red Plasma - Plasma Ruby
Red Plasma is the Ruby bindings of Plasma. Red Plasma is based on GObject Introspection.
Plasma is an in-memory object store and cache for big data.
[GObject Introspection](https://wiki.gnome.org/action/show/Projects/GObjectIntrospection) is a middleware for language bindings of C library. GObject Introspection can generate language bindings automatically at runtime.
Red Plasma uses [Plasma GLib](https://github.com/apache/arrow/tree/master/c_glib/plasma-glib) and [gobject-introspection gem](https://rubygems.org/gems/gobject-introspection) to generate Ruby bindings of Plasma.
Plasma GLib is a C wrapper for [Plasma C++](https://github.com/apache/arrow/tree/master/cpp/plasma). GObject Introspection can't use Plasma C++ directly. Plasma GLib is a bridge between Plasma C++ and GObject Introspection.
gobject-introspection gem is a Ruby bindings of GObject Introspection. Red Plasma uses GObject Introspection via gobject-introspection gem.
## Install
Install Plasma GLib before install Red Plasma. See [Apache Arrow install document](https://arrow.apache.org/install/) for details.
Install Red Plasma after you install Plasma GLib:
```text
% gem install red-plasma
```
## Usage
Starting the Plasma store
```console
plasma-store-server -m 1000000000 -s /tmp/plasma
```
Creating a Plasma client
```ruby
require "plasma"
client = Plasma::Client.new("/tmp/plasma")
```
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