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I followed az redis update doc to update shardCount for an existing redis instance.

If double quotes are included in --set parameter like --set "shardCount"="1", An usage error promoted to me

az redis update --subscription xxxxxx --name {my redis} --resource-group {my resourcegroup} --set "shardCount"="1" --output json
usage error: Empty key in --set. Correct syntax: --set KEY=VALUE [KEY=VALUE ...]

If try this, another error promoted to me

az redis update --subscription xxxxxx --name {my redis} --resource-group {my resourcegroup} --set \"shardCount\"=\"1\" --output json
Property '\shardCount\' not found on root. Send it as an additional property .
(InvalidRequestContent) The request content was invalid and could not be deserialized: 'Could not find member '\shardCount\' on object of type 'ResourceDefinition'. Path '['\\shardCount\\']', line 1, position 359.'.
Code: InvalidRequestContent
Message: The request content was invalid and could not be deserialized: 'Could not find member '\shardCount\' on object of type 'ResourceDefinition'. Path '['\\shardCount\\']', line 1, position 359.'.

If --set doesn't include double quotes like --set shardCount=1, command worked for me and updated the redis instance with a desired shard count in couple minutes later.

az redis update --subscription xxxxxx --name {my redis} --resource-group {my resourcegroup} --set shardCount=1 --output json

Thus, I am wondering the sample command with double quotes in --set parameter below in the doc is inaccurate.

az redis update --name MyRedisCache --resource-group MyResourceGroup --set "shardCount"="2"

Document Details

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• ID: ecb66426-9b0f-be54-5530-0673e6821f39
• Version Independent ID: 3d89a838-9a95-3cfe-ea58-7d7484e94956
• Content: az redis
• Content Source: latest/docs-ref-autogen/redis.yml
• Service: cache
• GitHub Login: @rloutlaw
• Microsoft Alias: routlaw