content/commands/bitfield_ro.md
Read-only variant of the [BITFIELD]({{< relref "/commands/bitfield" >}}) command.
It is like the original [BITFIELD]({{< relref "/commands/bitfield" >}}) but only accepts GET subcommand and can safely be used in read-only replicas.
Since the original [BITFIELD]({{< relref "/commands/bitfield" >}}) has SET and INCRBY options it is technically flagged as a writing command in the Redis command table.
For this reason read-only replicas in a Redis Cluster will redirect it to the master instance even if the connection is in read-only mode (see the [READONLY]({{< relref "/commands/readonly" >}}) command of Redis Cluster).
Since Redis 6.2, the BITFIELD_RO variant was introduced in order to allow [BITFIELD]({{< relref "/commands/bitfield" >}}) behavior in read-only replicas without breaking compatibility on command flags.
See original [BITFIELD]({{< relref "/commands/bitfield" >}}) for more details.
BITFIELD_RO hello GET i8 16
| Redis Software | Redis Cloud | <span style="min-width: 9em; display: table-cell">Notes</span> | |:----------------------|:-----------------|:------| | <span title="Supported">✅ Standard</span> <span title="Supported"><nobr>✅ Active-Active</nobr></span> | <span title="Supported">✅ Standard</span> <span title="Supported"><nobr>✅ Active-Active</nobr></span> | |
{{< multitabs id="bitfield-ro-return-info" tab1="RESP2" tab2="RESP3" >}}
Array reply: each entry being the corresponding result of the sub-command given at the same position.
-tab-sep-
Array reply: each entry being the corresponding result of the sub-command given at the same position.
{{< /multitabs >}}