3eddf5ac54
Message-Id: <1470649675-5648-1-git-send-email-penberg@scylladb.com>
(cherry picked from commit 3b31d500c8)
3.8 KiB
What is ScyllaDB ?
ScyllaDB is a high-performance Cassandra implementation written in C++14. Classified as a NoSQL database, ScyllaDB deliver a high number of transactions per seconds making it one of the fastest database on the planet. ScyllaDB is released under the GNU Affero General Public License version 3 and the Apache License, ScyllaDB is free and open-source software.
How to use this image
Start a scylla server instance
$ docker run --name some-scylla -d scylladb/scylla
Run nodetool utility
$ docker exec -it some-scylla nodetool status
Datacenter: datacenter1
=======================
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
-- Address Load Tokens Owns (effective) Host ID Rack
UN 172.17.0.2 125.51 KB 256 100.0% c9155121-786d-44f8-8667-a8b915b95665 rack1
Run cqlsh utility
$ docker exec -it some-scylla cqlsh
Connected to Test Cluster at 172.17.0.2:9042.
[cqlsh 5.0.1 | Cassandra 2.1.8 | CQL spec 3.2.1 | Native protocol v3]
Use HELP for help.
cqlsh>
Make a cluster
$ docker run --name some-scylla2 -d scylladb/scylla --seeds="$(docker inspect --format='{{ .NetworkSettings.IPAddress }}' some-scylla)"
Check scylla logs
$ docker logs some-scylla | tail
INFO 2016-08-04 06:57:40,836 [shard 5] database - Setting compaction strategy of system_traces.events to SizeTieredCompactionStrategy
INFO 2016-08-04 06:57:40,836 [shard 3] database - Setting compaction strategy of system_traces.events to SizeTieredCompactionStrategy
INFO 2016-08-04 06:57:40,836 [shard 1] database - Setting compaction strategy of system_traces.events to SizeTieredCompactionStrategy
INFO 2016-08-04 06:57:40,836 [shard 2] database - Setting compaction strategy of system_traces.events to SizeTieredCompactionStrategy
INFO 2016-08-04 06:57:40,836 [shard 4] database - Setting compaction strategy of system_traces.events to SizeTieredCompactionStrategy
INFO 2016-08-04 06:57:40,836 [shard 7] database - Setting compaction strategy of system_traces.events to SizeTieredCompactionStrategy
INFO 2016-08-04 06:57:40,837 [shard 6] database - Setting compaction strategy of system_traces.events to SizeTieredCompactionStrategy
INFO 2016-08-04 06:57:40,839 [shard 0] database - Schema version changed to fea14d93-9c5a-34f5-9d0e-2e49dcfa747e
INFO 2016-08-04 06:57:40,839 [shard 0] storage_service - Starting listening for CQL clients on 172.17.0.2:9042...
INFO 2016-08-04 06:57:40,840 [shard 0] storage_service - Thrift server listening on 172.17.0.2:9160 ...
Configuring data volume for storage
You can use Docker volumes to improve performance of Scylla.
Create a Scylla data directory /var/lib/scylla on the host, which is used by Scylla container to store all data:
$ sudo mkdir -p /var/lib/scylla/data /var/lib/scylla/commitlog
Launch Scylla using Docker's --volume command line option to mount the created host directory as a data volume in the container and disable Scylla's developer mode to run I/O tuning before starting up the Scylla node.
docker run --name some-scylla --volume /var/lib/scylla:/var/lib/scylla -d scylladb/scylla --developer-mode=0
Restricting container CPUs
Scylla utilizes all CPUs by default. To restrict your Docker container to a subset of the CPUs, use the --cpuset command line option:
docker run --name some-scylla -d scylladb/scylla --cpuset 0-4
User Feedback
Issues
Don't hesitage to report bugs or issues on http://www.github.com/scylladb/scylla's bug tracker.
Contributing
Want to scratch your own itch and contribute a patch. We are eager to review and merge your code. Please consult the Contributing on Scylla page