The hash algorithm of the Redis Cluster Edition is the same as that in the a Redis Community Edition cluster, i.e.,
HASH_SLOT = CRC16(key) mod 16384. For more information, see Redis Cluster Specification.
|Memory Edition (Standard Architecture)||0.25–64 GB|
|Memory Edition (Cluster Architecture)||2 GB–8 TB|
|CKV Edition (Standard Architecture)||4–384 GB|
|CKV Edition (Cluster Architecture)||12 GB–48 TB|
Redis Standard Architecture (zero-replica) does not provide high availability. Other editions of Redis adopt a master/replica replication structure, where data reliability is ensured by hot backup plus daily cold backup of the data.
On the TencentDB for Redis backend, the backup cluster performs full and incremental data backup, and persistence is done on the replicas which is virtually imperceptible to the online business.
That is used by the TencentDB for Redis instance in maintaining its data structure.
You can perform OPS and management operations in the TencentDB for Redis console. If you need to use a visual tool, use a CVM instance as a jump server to provide an access address for Redis Desktop Manager.
Momentary disconnections during scaling of different editions of TencentDB for Redis are as describe below:
This can be implemented through custom monitoring and alarming. For more information, see Monitoring and Alarming.
No. Multiple databases can be set on one Standard Architecture or Cluster Architecture instance.
Updates of the TencentDB for Redis master node will be automatically replicated to its associated replica node. Due to Redis' async replication mechanism, replica node updates may lag behind the master node updates. Possible reasons are as follows:
-The I/O write volume of the master node exceeds the sync speed of the replica node.
You can use the
telnet command to check the port connectivity.
Log in to the TencentDB for Redis console, click an instance ID in the instance list to enter the parameter configuration page, and configure a caching policy through the
maxmemory-policy parameter, whose default value is
Clients compatible with the Redis protocol can access TencentDB for Redis. You can choose an appropriate client as needed. For the download addresses, see Clients.
Log in to the TencentDB for Redis console and click an instance ID in the instance list to enter the Instance Details page, where you can upgrade the instance version. For more information, see Upgrading Instance Version.
Log in to the TencentDB for Redis console and click an instance ID in the instance list to enter the Instance Details page, where you can upgrade the instance architecture. For more information, see Upgrading Instance Architecture.