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6317bd45d7
This is the last missing tracker among the major strategies. After this, only DTCS is left. To calculate the backlog, we will define the point of zero-backlog as having all data in the last level. The backlog is then: Sum(L in levels) sizeof(L) * (max_levels - L) * fan_out, where: * the fan_out is the amount of SSTables we usually compact with the next level (usually 10). * max_levels is the number of levels currently populated * sizeof(L) is the total amount of data in a particular level. Care is taken for the backlog not to jump when a new level has been just recently created. Aside from that, SSTables that accumulate in L0 can be subject to STCS. We will then add a STCS backlog in those SSTables to represent that. Signed-off-by: Glauber Costa <glauber@scylladb.com>
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>