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scylladb [2019/01/01 14:50] – external edit 127.0.0.1 | scylladb [2023/02/06 13:36] (current) – Jan Forman | ||
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+ | ====== 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 | ||
+ | < | ||
+ | |||
+ | |||
+ | < | ||
+ | CPUSET=" | ||
+ | </ | ||
+ | |||
+ | ====== Delay Start Systemd ====== | ||
+ | [Service] | ||
+ | ExecStartPre=/ | ||
+ | |||
+ | ====== Cannot start ScyllaDB 2.1 on CentOS 7 ====== | ||
+ | < | ||
+ | remark AmbientCapabilities in scylla-server.service | ||
+ | </ | ||
+ | |||
+ | ====== Remove node ====== | ||
+ | |||
+ | Temporary | ||
+ | < | ||
+ | Flush node | ||
+ | < | ||
+ | |||
+ | ====== Nodetool status ====== | ||
+ | < | ||
+ | |||
+ | ====== 3rd repository ====== | ||
+ | < | ||