Tair (Redis OSS-compatible) lets you change instance configurations on demand—including the instance architecture, shard specifications, and number of shards—to improve resource utilization and optimize costs.
This topic describes the fees for upgrades and the refund policy for downgrades.
Pay-as-you-go instances
For pay-as-you-go instances, charges are based on the instance configuration at the time of order creation. Because pay-as-you-go billing works on a post-usage model, no refunds apply when you downgrade the configuration.
Subscription instances
You can change the configuration of a subscription instance at any time, whether before or after it expires. A change is classified as an upgrade if the new configuration costs more than the current one, or a downgrade if it costs less.
Cost—not raw specs—determines whether a change is an upgrade or downgrade. For example, an 8 GB read/write splitting instance with five read-only nodes costs more than a 16 GB cluster instance. Switching from the 16 GB cluster to that 8 GB read/write splitting instance is an upgrade, not a downgrade.
Upgrade fees
| Method | Billing rule |
|---|---|
| Upgrade | Instance upgrade fee = (Original price for the remaining validity period after upgrade − Original price for the remaining validity period before upgrade) × Discount for the remaining validity period |
Where:
Original price for the remaining validity period after upgrade = Unit price after upgrade × Remaining validity period
Original price for the remaining validity period before upgrade = Unit price before upgrade × Remaining validity period
For more information about the unit price of the new configuration, the unit price of the original configuration, and the remaining duration, see Upgrade details.
Downgrade refunds
Refundable amount = Online refundable amount × Price difference ratio between the new and original orders
If you downgrade multiple orders, the refundable amount for each order is calculated separately and then summed. For details on how the online refundable amount and the price difference ratio are calculated, see Refund rules
Edition changes
The following restrictions apply when changing between editions:
Redis Open-Source Edition classic instances can be upgraded to Redis Enhanced Edition (Tair) instances.
Redis Enhanced Edition (Tair) instances cannot be changed to Redis Open-Source Edition instances.
FAQ
退款到账时间
产品退订成功，退款大约会在2个工作日内退回（退款仅指用户以现金或储值卡方式支付的订单款项，用户通过代金券、优惠券抵扣的部分不支持退回）。
通过网银支付的订单发生退订且满足原路退回，受银行受理时间影响，预计2-3个工作日内到账。
退订后资金流向
Refunds are generally returned to the original payment channel.
For orders paid with Alipay for transactions made after March 29, 2019, if you unsubscribe within 18 months (548 days) of payment, the refund is sent to the Alipay account used for the payment. If the refund fails, it is credited to your Alibaba Cloud account balance.
For orders paid via online banking, if you unsubscribe within 90 days of payment, the refund is typically returned to the original bank card. If the refund to the bank fails, the amount is credited to your Alibaba Cloud account balance.
For orders paid with your account balance, the refund is credited directly to your Alibaba Cloud account balance.
For orders paid with other payment methods, such as WeChat Pay or UnionPay QuickPass, the refund is first returned to the original payment channel. If this process fails, the refund is credited to your Alibaba Cloud account balance.
Special cases
Invoiced orders:
For invoiced orders, except for Alibaba Cloud Marketplace products, refunds are credited to your Alibaba Cloud account balance by default, regardless of the original payment method.
After you return the invoice, you can withdraw the funds from your account balance to the original payment channel. If a withdrawal to the original channel is not possible, you can withdraw to a specified account.
Refund amount limits:
The portion of a payment covered by a coupon is not refundable. Only the cash amount that was paid is refunded.
Where does my refund go?
Refunds are returned to the original payment account after you confirm the unsubscription.
| Payment method | Within the time limit | After the time limit |
|---|---|---|
| Credit card | Returned to your credit card account within 5 months (150 days) of payment | Returned to your Alibaba Cloud account |
| PayPal | Returned to your PayPal account within 6 months (180 days) of payment | Returned to your Alibaba Cloud account |
| Paytm | Returned to your Paytm account within 1 year (365 days) of payment | Returned to your Alibaba Cloud account |
| Alibaba Cloud account balance | Returned to your Alibaba Cloud account balance | — |
How long does a refund take?
Refunds are issued within 30 business days after you confirm the unsubscription.
What's next
To change the memory size, architecture, number of shards, or number of read-only nodes for a classic deployment instance, see Change instance configurations.
To increase or decrease the number of shards for a cloud-native cluster instance, see Adjust the number of shards for a cluster.
To enable read/write splitting for a cloud-native instance, see Enable read/write splitting.