Nadav Har'El c2cf2ab99b alternator: implement correct "number" type for keys
This patch implements a fully working number type for keys, and now
Alternator fully and correctly supports every key type - strings, byte
arrays, and numbers.

The patch also adds a test which verifies that Scylla correctly sorts
number sort keys, and also correctly retrieves them to the full precision
guaranteed by DynamoDB (38 decimal digits).

The implementation uses Scylla's "decimal" type, which supports arbitrary
precision decimal floating point, and in particular supports the precision
specified by DynamoDB. However, "decimal" is actually over-qualified for
this use, so might not be optimal for the more specific requirements of
DynamoDB. So a FIXME is left to optimize this case in the future.

Signed-off-by: Nadav Har'El <nyh@scylladb.com>
2019-08-19 15:48:17 +03:00
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Scylla

Quick-start

To get the build going quickly, Scylla offers a frozen toolchain which would build and run Scylla using a pre-configured Docker image. Using the frozen toolchain will also isolate all of the installed dependencies in a Docker container. Assuming you have met the toolchain prerequisites, which is running Docker in user mode, building and running is as easy as:

$ ./tools/toolchain/dbuild ./configure.py
$ ./tools/toolchain/dbuild ninja build/release/scylla
$ ./tools/toolchain/dbuild ./build/release/scylla --developer-mode 1

Please see HACKING.md for detailed information on building and developing Scylla.

Note: GCC >= 8.1.1 is required to compile Scylla.

Running Scylla

  • Run Scylla
./build/release/scylla

  • run Scylla with one CPU and ./tmp as data directory
./build/release/scylla --datadir tmp --commitlog-directory tmp --smp 1
  • For more run options:
./build/release/scylla --help

Building Fedora RPM

As a pre-requisite, you need to install Mock on your machine:

# Install mock:
sudo yum install mock

# Add user to the "mock" group:
usermod -a -G mock $USER && newgrp mock

Then, to build an RPM, run:

./dist/redhat/build_rpm.sh

The built RPM is stored in /var/lib/mock/<configuration>/result directory. For example, on Fedora 21 mock reports the following:

INFO: Done(scylla-server-0.00-1.fc21.src.rpm) Config(default) 20 minutes 7 seconds
INFO: Results and/or logs in: /var/lib/mock/fedora-21-x86_64/result

Building Fedora-based Docker image

Build a Docker image with:

cd dist/docker
docker build -t <image-name> .

Run the image with:

docker run -p $(hostname -i):9042:9042 -i -t <image name>

Contributing to Scylla

Hacking howto Guidelines for contributing

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