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https://github.com/scylladb/scylladb.git
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bdbbfe9390
"Currently restricting_mutation_reader restricts mutation_readears on a count basis. This is inaccurate on multiple levels. The reader might be a combined_mutation_reader, which might be composed of multiple individual readers, whose number might change during the lifetime of the reader. The memory consumption of the readers can vary and may change during the lifetime of the reader as well. To remedy this, make the restriction memory-consumption based. The restricting semaphore is now configured with the amound of memory (bytes) that its readers are allowed to consume in total. New readers consume 128k units up-front to account for read-ahead buffers, and then consume additional units for any buffer (returned from input_stream<>::read()) they keep around. Like before, readers already allowed to read will not be blocked, instead new readers will be blocked on their first read if all the units all consumed. Fixes #2692." * 'bdenes/restricting_mutation_reader-v5' of https://github.com/denesb/scylla: Update reader restriction related metrics Add restricted_reader_test unit test restricted_mutation_reader: restrict based-on memory consumption mutation_reader.hh: Move restricted_reader related code
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>