scylladb
Table of Contents
Consistency Levels
| ANY | A write is written to at least one node in the cluster. Provides the highest availability with the lowest consistency. |
| QUORUM | When a majority of the replicas respond, the request is honored. If RF=3, then 2 replicas respond. QUORUM can be calculated using the formula (n/2 +1) where n is the Replication Factor. |
| ONE | If one replica responds, the request is honored. |
| LOCAL_ONE | At least one replica in the local data center responds. |
| LOCAL_QUORUM | A quorum of replicas in the local datacenter responds. |
| EACH_QUORUM | (unsupported for reads) – A quorum of replicas in ALL data centers must be written to. |
| ALL | A write must be written to all replicas in the cluster, a read waits for a response from all replicas. Provides the lowest availability with the highest consistency. |
LXC Params
Developer mode on
SCYLLA_ARGS="--log-to-syslog 1 --log-to-stdout 0 --default-log-level info --collectd-address=127.0.0.1:25826 --collectd=1 --collectd-poll-period 3000 --network-stack posix --smp 4 --memory 6G --overprovisioned"
cat /etc/scylla.d/cpuset.conf CPUSET="--cpuset 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35"
Delay Start Systemd
[Service] ExecStartPre=/bin/sleep 10
Cannot start ScyllaDB 2.1 on CentOS 7
remark AmbientCapabilities in scylla-server.service
Remove node
Temporary
nodetool drain
Flush node
nodetool decomission
Nodetool status
nodetool -h ::FFFF:127.0.0.1 status
3rd repository
https://copr.fedorainfracloud.org/coprs/scylladb/scylla-3rdparty/repo/epel-7/scylladb-scylla-3rdparty-epel-7.repo
scylladb.txt · Last modified: 2023/02/06 13:36 by Jan Forman