1379d8330f
Many sstable test cases create tempdir on their own to create sstables with. Sometimes it's justified when the test needs to check files on disk by hand for some validation, but often all checks are fs-agnostic. The latter case(s) can be patched to work on top of any storage, in particular -- on top of object storage. To make it work tests should stop creating sstables explicitly in tempdir and this PR does exactly that.
All relevant occurrences of tempdir are removed from test cases, instead the sstable::test_env's tempdir is used. Next, the test_env::{create_sstable|reusable_sst} are patched not to accept the `fs::path dir` argument and pick the env's tempdir. Finally, the `make_sstable_easy` helper is patched to use path-less env methods too.
refs: #13015
Closes #13116
* github.com:scylladb/scylladb:
test,sstables: Remove path from make_sstable_easy()
test,lib: Remove wrapper over reusable_sst and move the comment
test: Make "compact" test case use env dir
test,compaction: Use env tempdir in some more cases
test,compaction: Make check_compacted_sstables() use env's dir
test: Relax making sstable with sequential generation
test/sstable::test_env: Keep track of auto-incrementing generation
test/lib: Add sstable maker helper without factory
test: Remove last occurrence of test_env::do_with(rval, ...)
test,sstables: Dont mess with tempdir where possible
test/sstable::test_env: Add dir-less sstables making helpers
test,sstables: Use sstables::test_env's tempdir with sweeper
test,sstables: Use sstables::test_env's tempdir
test/lib: Add tempdir sweeper
test/lib: Open-code make_sstabl_easy into make_sstable
test: Remove vector of mutation interposer from test_key_count_estimation
Scylla
What is Scylla?
Scylla is the real-time big data database that is API-compatible with Apache Cassandra and Amazon DynamoDB. Scylla embraces a shared-nothing approach that increases throughput and storage capacity to realize order-of-magnitude performance improvements and reduce hardware costs.
For more information, please see the ScyllaDB web site.
Build Prerequisites
Scylla is fairly fussy about its build environment, requiring very recent versions of the C++20 compiler and of many libraries to build. The document HACKING.md includes detailed information on building and developing Scylla, but to get Scylla building quickly on (almost) any build machine, Scylla offers a frozen toolchain, This is a pre-configured Docker image which includes recent versions of all the required compilers, libraries and build tools. Using the frozen toolchain allows you to avoid changing anything in your build machine to meet Scylla's requirements - you just need to meet the frozen toolchain's prerequisites (mostly, Docker or Podman being available).
Building Scylla
Building Scylla with the frozen toolchain dbuild is as easy as:
$ git submodule update --init --force --recursive
$ ./tools/toolchain/dbuild ./configure.py
$ ./tools/toolchain/dbuild ninja build/release/scylla
For further information, please see:
- Developer documentation for more information on building Scylla.
- Build documentation on how to build Scylla binaries, tests, and packages.
- Docker image build documentation for information on how to build Docker images.
Running Scylla
To start Scylla server, run:
$ ./tools/toolchain/dbuild ./build/release/scylla --workdir tmp --smp 1 --developer-mode 1
This will start a Scylla node with one CPU core allocated to it and data files stored in the tmp directory.
The --developer-mode is needed to disable the various checks Scylla performs at startup to ensure the machine is configured for maximum performance (not relevant on development workstations).
Please note that you need to run Scylla with dbuild if you built it with the frozen toolchain.
For more run options, run:
$ ./tools/toolchain/dbuild ./build/release/scylla --help
Testing
See test.py manual.
Scylla APIs and compatibility
By default, Scylla is compatible with Apache Cassandra and its APIs - CQL and Thrift. There is also support for the API of Amazon DynamoDB™, which needs to be enabled and configured in order to be used. For more information on how to enable the DynamoDB™ API in Scylla, and the current compatibility of this feature as well as Scylla-specific extensions, see Alternator and Getting started with Alternator.
Documentation
Documentation can be found here. Seastar documentation can be found here. User documentation can be found here.
Training
Training material and online courses can be found at Scylla University. The courses are free, self-paced and include hands-on examples. They cover a variety of topics including Scylla data modeling, administration, architecture, basic NoSQL concepts, using drivers for application development, Scylla setup, failover, compactions, multi-datacenters and how Scylla integrates with third-party applications.
Contributing to Scylla
If you want to report a bug or submit a pull request or a patch, please read the contribution guidelines.
If you are a developer working on Scylla, please read the developer guidelines.
Contact
- The community forum and Slack channel are for users to discuss configuration, management, and operations of the ScyllaDB open source.
- The developers mailing list is for developers and people interested in following the development of ScyllaDB to discuss technical topics.