c9f488ddc2
Consider
master: row(pk=1, ck=1, col=10)
follower1: row(pk=1, ck=1, col=20)
follower2: row(pk=1, ck=1, col=30)
When repair runs, master fetches row(pk=1, ck=1, col=20) and row(pk=1,
ck=1, col=30) from follower1 and follower2.
Then repair master sends row(pk=1, ck=1, col=10) and row(pk=1, ck=1,
col=30) to follower1, follower1 will write the row with the same
pk=1, ck=1 twice, which violates uniqueness constraints.
To fix, we apply the row with same pk and ck into the previous row.
We only needs this on repair follower because the rows can come from
multiple nodes. While on repair master, we have a sstable writer per
follower, so the rows feed into sstable writer can come from only a
single node.
Tests: repair_additional_test.py:RepairAdditionalTest.repair_same_row_diff_value_3nodes_test
Fixes: #4510
Message-Id: <cb4fbba1e10fb0018116ffe5649c0870cda34575.1560405722.git.asias@scylladb.com>
(cherry picked from commit 9079790f85)
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.
Note: See frozen toolchain for a way to build and run on an older distribution.
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>