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Comparing DCS Instance Types

Updated at: Mar 17, 2020 GMT+08:00

Table 1 describes the differences between different instance types in terms of features and commands.

Table 1 Differences between DCS instance types

Item

Single-Node or Master/Standby

Proxy Cluster

Redis Cluster

Support

  • Keyspace notifications
  • Pipelining
  • Pipelining, MSET command, and MGET command
  • SCAN command, KEYS command, and Redis Slow Log
  • Pub/Sub
  • Keyspace notifications
  • BRPOP, BLPOP, and BRPOPLPUSH commands
  • Pub/Sub

Restrictions

Data persistence is not supported for single-node instances.

  • LUA script is restricted: All keys must be in the same hash slot to avoid errors. Hash tags are recommended.
  • If a command contains multiple keys, the keys must be in the same hash slot to avoid errors. Hash tags are recommended.
  • Keyspace notifications are not supported.
  • LUA script is restricted: All keys must be in the same hash slot. Hash tags are recommended.
  • The client SDK must support Redis Cluster and be able to process MOVED errors.
  • When you are using pipelining, MSET command, or MGET command, all keys must be in the same hash slot to avoid errors. Hash tags are recommended.
  • When using keyspace notifications, establish connections with every Redis server and process events on each connection.
  • When using a traversing or global command such as SCAN and KEYS, run the command on each Redis server.

Disabled commands

For details about disabled commands, see Table 4 and Table 6.

For details about disabled commands, see Table 4 and Table 5.

For details about disabled commands, see Table 6 and Table 7.

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