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1f46133273
" Most of the code in `cell` and the `imr` infrastructure it is built on is `noexcept`. This means that extra care must be taken to avoid rouge exceptions as they will bring down the node. The changes introduced by 0a453e5d3a did just that - introduced rouge `std::bad_alloc` into this code path by violating an undocumented and unvalidated assumption -- that fragment ranges passed to `cell::make_collection()` are nothrow copyable and movable. This series refactors `cell::make_collection()` such that it does not have this assumption anymore and is safe to use with any range. Note that the unit test included in this series, that was used to find all the possible exception sources will not be currently run in any of our build modes, due to `SEASTAR_ENABLE_ALLOC_FAILURE_INJECTION` not being set. I plan to address this in a followup because setting this flags fails other tests using the failure injection mechanism. This is because these tests are normally run with the failure injection disabled so failures managed to lurk in without anyone noticing. Fixes: #5575 Refs: #5341 Tests: unit(dev, debug) " * 'data-cell-make-collection-exception-safety/v2' of https://github.com/denesb/scylla: test: mutation_test: add exception safety test for large collection serialization data/cell.hh: avoid accidental copies of non-nothrow copiable ranges utils/fragment_range.hh: introduce fragment_range_view
Scylla
Quick-start
To get the build going quickly, Scylla offers a frozen toolchain which would build and run Scylla using a pre-configured Docker image. Using the frozen toolchain will also isolate all of the installed dependencies in a Docker container. Assuming you have met the toolchain prerequisites, which is running Docker in user mode, building and running is as easy as:
$ ./tools/toolchain/dbuild ./configure.py
$ ./tools/toolchain/dbuild ninja build/release/scylla
$ ./tools/toolchain/dbuild ./build/release/scylla --developer-mode 1
Please see HACKING.md for detailed information on building and developing Scylla.
Note: GCC >= 8.1.1 is required to compile Scylla.
Running Scylla
- Run Scylla
./build/release/scylla
- run Scylla with one CPU and ./tmp as work directory
./build/release/scylla --workdir tmp --smp 1
- For more run options:
./build/release/scylla --help
Scylla APIs and compatibility
By default, Scylla is compatible with Apache Cassandra and its APIs - CQL and Thrift. There is also experimental support for the API of Amazon DynamoDB, but being experimental it needs to be explicitly enabled to be used. For more information on how to enable the experimental DynamoDB compatibility in Scylla, and the current limitations of this feature, see Alternator and Getting started with Alternator.
Documentation
Documentation can be found in ./docs and on the wiki. There is currently no clear definition of what goes where, so when looking for something be sure to check both. Seastar documentation can be found here. User documentation can be found here.
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>