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.
Scylla is fairly fussy about its build environment, requiring very recentversions of the C++20 compiler and of many libraries to build. The documentHACKING.md includes detailed information on building anddeveloping Scylla, but to get Scylla building quickly on (almost) any buildmachine, Scylla offers a frozen toolchain,This is a pre-configured Docker image which includes recent versions of allthe required compilers, libraries and build tools. Using the frozen toolchainallows you to avoid changing anything in your build machine to meet Scylla'srequirements - you just need to meet the frozen toolchain's prerequisites(mostly, Docker or Podman being available).
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:
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
See test.py manual.
By default, Scylla is compatible with Apache Cassandra and its APIs - CQL andThrift. There is also support for the API of Amazon DynamoDB™,which needs to be enabled and configured in order to be used. For moreinformation on how to enable the DynamoDB™ API in Scylla,and the current compatibility of this feature as well as Scylla-specific extensions, seeAlternator andGetting started with Alternator.
Documentation can be found here.Seastar documentation can be found here.User documentation can be found here.
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.
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.
1 ScyllaDB安装 1.1 下载安装包 找一台能联网的主机,执行命令: curl -o /etc/yum.repos.d/scylla.repo -L http://repositories.scylladb.com/scylla/repo/e4c98290-5e67-42bd-b592-f5e933d2543b/centos/scylladb-3.0.repo mkdir -p /da
状况 安装Scylla之后出错 [~]$ scylla [3:05:44] 2018-07-02 - 03:06:37 DEBUG: create new db connection Traceback (m
Use these steps to install Scylla using Yum repositories on CentOS. Prerequisites CentOS 7.3 or later, for the 64-bit x86_64 architecture. Yum package management application installed. ABRT conflict w
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我有三个节点Syclla集群。我有3复制因子的密钥空间。我使用datastax-java-driver 3.6.0版本和Scylla 3.0.0版本。当我试图读取一致性级别=LOCAL_QUORUM的数据时,我得到以下错误消息,这在我看来是不可能的。如果我使用LOCAL_QUORUM,2个节点足够3个复制因子。 是虫子还是我漏掉了什么? com.datastax.driver.core.excep