Command Restrictions¶
Some Redis commands are supported by Redis Cluster DCS instances for multi-key operations in the same slot. For details, see Table 1.
Some commands support multiple keys but do not support cross-slot access. For details, see Table 2.
Category | Description |
|---|---|
Set | |
SINTER | Returns the members of the set resulting from the intersection of all the given sets. |
SINTERSTORE | Equal to SINTER, but instead of returning the result set, it is stored in destination. |
SUNION | Returns the members of the set resulting from the union of all the given sets. |
SUNIONSTORE | Equal to SUNION, but instead of returning the result set, it is stored in destination. |
SDIFF | Returns the members of the set resulting from the difference between the first set and all the successive sets. |
SDIFFSTORE | Equal to SDIFF, but instead of returning the result set, it is stored in destination. |
SMOVE | Moves member from the set at source to the set at destination. |
Sorted Set | |
ZUNIONSTORE | Computes the union of numkeys sorted sets given by the specified keys. |
ZINTERSTORE | Computes the intersection of numkeys sorted sets given by the specified keys. |
HyperLogLog | |
PFCOUNT | Returns the approximated cardinality computed by the HyperLogLog data structure stored at the specified variable. |
PFMERGE | Merges multiple HyperLogLog values into a unique value. |
Keys | |
RENAME | Renames key to newkey. |
RENAMENX | Renames key to newkey if newkey does not yet exist. |
BITOP | Performs a bitwise operation between multiple keys (containing string values) and stores the result in the destination key. |
RPOPLPUSH | Returns and removes the last element (tail) of the list stored at source, and pushes the element at the first element (head) of the list stored at destination. |
String | |
MSETNX | Merges multiple HyperLogLog values into a unique value. |
Note
While running commands that take a long time to run, such as FLUSHALL, DCS instances may not respond to other commands and may change to the faulty state. After the command finishes executing, the instance will return to normal.
Category | Command |
|---|---|
Multi-key commands that support cross-slot access | DEL, MGET, MSET, EXISTS, SUNION, SINTER, SDIFF, SUNIONSTORE, SINTERSTORE, SDIFFSTORE, ZUNIONSTORE, ZINTERSTORE |
Multi-key commands that do not support cross-slot access | SMOVE, SORT, BITOP, MSETNX, RENAME, RENAMENX, BLPOP, BRPOP, RPOPLPUSH, BRPOPLPUSH, PFMERGE, PFCOUNT, BLMOVE, COPY, GEOSEARCHSTORE, LMOVE, ZRANGESTORE |