Vlad Zolotarov 83ba6d84a1 db::hints::manager: implement rebalance() method
Rebalance hints segments that need to be sent among all present shards.

Ensure that after rebalancing the difference between the number of segments
of any two shards is not greater than 1.

Try to minimize the amount of "file rename" operations in order to achieve the needed result.

Note: "Resharding" is a particular case of rebalancing.

Tests: dtest: hintedhandoff_additional_test.py:TestHintedHandoff.hintedhandoff_rebalance_test

Signed-off-by: Vlad Zolotarov <vladz@scylladb.com>
2018-07-06 19:18:46 -04:00
2018-06-24 14:54:46 +03:00
2018-06-25 09:21:47 +01:00
2018-06-19 16:26:51 +03:00
2018-05-30 14:41:41 +02:00
2017-06-23 11:35:35 -04:00
2018-02-14 14:15:59 -05:00
2017-02-02 10:35:14 +00:00
2017-08-27 13:11:33 +03:00
2017-06-23 11:35:35 -04:00
2018-06-14 11:11:41 +02:00
2018-06-14 11:11:41 +02:00
2018-06-05 11:10:24 +02:00

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.

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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