Jesse Haber-Kucharsky c37aa258c5 build: Fix incremental builds when Seastar changes
When a file in the `seastar` directory changes, we want to minimize the
amount of Scylla artifacts that are re-built while ensuring that all
changes in Seastar are reflected in Scylla correctly.

For compiling object files, we change Seastar to be an "order only"
dependency so that changes to Seastar don't trigger unnecessary builds.

For linking, we add an "implicit" dependency on Seastar so that Scylla
is re-linked when Seastar changes.

With these changes, modifying a Seastar header file will trigger the
recompilation of the affected Scylla object files, and modifying a
Seastar source file will trigger linking only.

Fixes #4171

Signed-off-by: Jesse Haber-Kucharsky <jhaberku@scylladb.com>
Message-Id: <0ab43d79ce0d41348238465d1819d4c937ac6414.1548906335.git.jhaberku@scylladb.com>
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Scylla

Quick-start

$ git submodule update --init --recursive
$ sudo ./install-dependencies.sh
$ ./configure.py --mode=release
$ ninja-build -j4 # Assuming 4 system threads.
$ ./build/release/scylla
$ # Rejoice!

Please see HACKING.md for detailed information on building and developing Scylla. Note: GCC >= 8.1.1 is require 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

Guidelines for contributing

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