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Copy file name to clipboardExpand all lines: articles/azure-netapp-files/cool-access-introduction.md
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@@ -98,138 +98,11 @@ When you create volumes in the capacity pool and start tiering data to the cool
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* 0.1-TiB capacity at the cool tier
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* Data transfers costs occur for the initial transfer of snapshots, then network transfer costs incur only when snapshots are restored.
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### Examples of cost calculations with varying coolness periods
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##Calculate your savings
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This section shows you examples of storage and network transfer costs with varying coolness periods.
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Calculate your savings from cool access in the [Azure NetApp Files effective price estimator](https://aka.ms/anfcoolaccesscalc).
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In these examples, assume that:
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* The hot tier storage cost is $0.000202/GiB/hr. The cool tier storage cost is $0.000082/GiB/hr.
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* Network transfer cost (including read or write activities from the cool tier) is $0.020000/GiB.
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* A 5-TiB capacity pool with cool access is enabled.
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* One TiB of unallocated capacity is within the capacity pool.
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* A 4-TiB volume is enabled for cool access.
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* After the coolness period, 3 TiB of the 4 TiB is moved to the cool tier.
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* Each month, you read or write 20% of data from the cool tier.
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* Each month is 30 days or 730 hours. So each day is 730/30 hours.
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> [!IMPORTANT]
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> * Use these calculations only as a reference estimate and not for validating the exact bill amount.
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> * The rates considered in the examples are for an example region and might be different for your intended region of deployment.
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> * If data is read from or written to the cool tier, it causes the percentage of data distribution in the hot tier and cool tier to change. The calculations in this article demonstrate initial percentage distribution in the hot and cool tiers, and not after the 20% of data was moved to or from the cool tier.
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The following examples include 1 TiB of unallocated space in the capacity pool to show how unallocated space is charged when cool access is enabled. To maximize your savings, the capacity pool size should be reduced to eliminate unallocated pool capacity.
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#### Example 1: Coolness period is set to seven days
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Your storage cost for the *first month*:
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| Cost | Description | Calculation |
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|---|---|---|
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| Unallocated storage cost for days 1~30 (30 days) | 1 TiB of unallocated storage | 1 TiB x 1024 x 30 days x 730/30 hrs. x $0.000202/GiB/hr. = $151.00 |
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| Storage cost for days 1~7 (seven days) | 4 TiB of active data (hot tier) | 4 TiB x 1024 x 7 days x 730/30 hrs. x $0.000202/GiB/hr. = $140.93 |
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| Storage cost for days 8~30 (23 days) | 1 TiB of active data (hot tier) <br><br> 3 TiB of inactive data (cool tier) | 1 TiB x 1024 x 23 days x 730/30 hrs. x $0.000202/GiB/hr. = $115.77 <br><br> 3 TiB x 1024 x 23 days x 730/30 hrs. x $0.000082/GiB/hr. = $140.98 |
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| Network transfer cost | Moving inactive data to cool tier <br><br> 20% of data read/write from cool tier | 3 TiB x 1024 x $0.020000/GiB = $61.44 <br><br> 3 TiB x 1024 x 20% x $0.020000/GiB = $12.29 |
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|**First month total**||**$622.41**|
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Your monthly storage cost for the *second and subsequent months*:
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| Cost | Description | Calculation |
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|---|---|---|
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| Storage cost for 30 days | 1 TiB of unallocated storage <br><br> 1 TiB of active data (hot tier) <br><br> 3 TiB of inactive data (cool tier) | 1 TiB x 1024 x 30 days x 730/30 hrs. x $0.000202/GiB/hr. = $151.00 <br><br> 1 TiB x 1024 x 30 days x 730/30 hrs. x $0.000202/GiB/hr. = $151.00 <br><br> 3 TiB x 1024 x 30 days x 730/30 hrs. x $0.000082/GiB/hr. = $183.89 |
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| Network transfer cost | 20% of data read/write from cool tier | 3 TiB x 1024 x 20% x $0.020000/GiB = $12.29 |
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|**Second and subsequent monthly total**||**$498.18**|
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Your first six-month savings:
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* Cost without cool access: 5 TiB x 1024 x $0.000202/GiB/hr. x 730 hrs. x 6 months = $4,529.97
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* Cost with cool access:
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First month + Second month + … + Sixth month = $622.41 + (5x $498.18) = $3,113.31
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* Savings using cool access: **31.27%**
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Your first 12-month savings:
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* Cost without cool access: 5 TiB x 1024 x $0.000202/GiB/hr. x 730 hrs. x 12 months = $9,059.94
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* Cost with cool access: First month + Second month + … + twelfth month = $622.41 + (11 x $498.18) = $6,102.39
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* Savings using cool access: **32.64%**
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#### Example 2: Coolness period is set to 35 days
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All 5 TiB is active data (in hot tier) for the first month. Your storage cost for the *first month*:
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5 TiB x 1024 x 730hr. x $0.000202/GiB/hr. = $755.00
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Your storage cost for the *second month*:
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| Cost | Description | Calculation |
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|---|---|---|
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| Unallocated storage cost for days 1~30 (30 days) | 1 TiB of unallocated storage | 1 TiB x 1024 x 30 days x 730/30 hrs. x $0.000202/GiB/hr. = $151.00 |
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| Storage cost for days 1~5 (five days) | 4 TiB of active data (hot tier) | 4 TiB x 1024 x 5 days x 730/30 hrs. x $0.000202/GiB/hr. = $100.67 |
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| Storage cost for days 6~30 (25 days) | 1 TiB of active data (hot tier) <br><br> 3 TiB of inactive data (cool tier) | 1 TiB x 1024 x 25 days x 730/30 hrs. x $0.000202/GiB/hr. = $125.83 <br><br> 3 TiB x 1024 x 25 days x 730/30 hrs. x $0.000082/GiB/hr. = $153.24 |
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| Network transfer cost | Moving inactive data to cool tier <br><br> 20% of data read/write from cool tier | 3 TiB x 1024 x $0.020000 /GiB = $61.44 <br><br> 3 TiB x 1024 x 20% x $0.020000/GiB = $12.29 |
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|**Second month total**||**$604.47**|
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Your monthly storage cost for *third and subsequent months*:
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| Cost | Description | Calculation |
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|---|---|---|
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| Storage cost for 30 days | 1 TiB of unallocated storage <br><br> 1 TiB of active data (hot tier) <br><br> 3 TiB of inactive data (cool tier) | 1 TiB x 1024 x 30 days x 730/30 hrs. x $0.000202/GiB/hr. = $151.00<br><br> 1 TiB x 1024 x 30 days x 730/30 hrs. x $0.000202/GiB/hr. = $151.00 <br><br> 3 TiB x 1024 x 30 days x 730/30 hrs. x $0.000082/GiB/hr. = $183.89 |
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| Network transfer cost | 20% of data read/write from cool tier | 3 TiB x 1024 x 20% x $0.020000/GiB = $12.29 |
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|**Third and subsequent monthly total**||**$498.18**|
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Your first six-month savings:
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* Cost without cool access: 5 TiB x 1024 x $0.000202/GiB/hr. x 730 hrs. x 6 months = $4,529.97
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* Cost with cool access:
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First month + Second month + … + Sixth month = $755.00 + $604.47 + (4 x $498.18) = $3,352.19
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* Savings using cool access: **25.99%**
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Your first 12-month savings:
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* Cost without cool access: 5 TiB x 1024 x $0.000202/GiB/hr. x 730 hrs. x 12 months = $9,059.94
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* Cost with cool access: First month + Second month + … + twelfth month = $755.00 + $604.47 + (10 x $498.18) = $6,341.27
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* Savings using cool access: **30.00%**
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#### Example 3: Coolness period is set to 63 days
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All 5 TiB is active data (in hot tier) for the first two months. Your monthly storage cost for the *first and second months*: 5 TiB x 1024 x 730hr. x $0.000202/GiB/hr. = $755.00
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Your storage cost for the *third month*:
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| Cost | Description | Calculation |
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|---|---|---|
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| Unallocated storage cost for days 1~30 (30 days) | 1 TiB of unallocated storage | 1 TiB x 1024 x 30 days x 730/30 hrs. x $0.000202/GiB/hr. = $151.00 |
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| Storage cost for days 1~3 (three days) | 4 TiB of active data (hot tier) | 4 TiB x 1024 x 3 days x 730/30 hrs. x $0.000202/GiB/hr. = $60.40 |
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| Storage cost for days 4~30 (27 days) | 1 TiB of active data (hot tier) <br><br> 3 TiB of inactive data (cool tier) | 1 TiB x 1024 x 27 days x 730/30 hrs. x $0.000202/GiB/hr. = $135.90 <br><br> 3 TiB x 1024 x 27 days x 730/30 hrs. x $0.000082/GiB/hr. = $165.50 |
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| Network transfer cost | Moving inactive data to cool tier <br><br> 20% of data read/write from cool tier | 3 TiB x 1024 x $0.020000/GiB = $61.44 <br><br> 3 TiB x 1024 x 20% x $0.020000/GiB = $12.29 |
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|**Third month total**||**$586.52**|
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Your monthly storage cost for the *fourth and subsequent months*:
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| Cost | Description | Calculation |
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|---|---|---|
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| Storage cost for 30 days | 1 TiB of unallocated storage <br><br> 1 TiB of active data (hot tier) <br><br> 3 TiB of inactive data (cool tier) | 1 TiB x 1024 x 30 days x 730/30 hrs. x $0.000202/GiB/hr. = $151.00 <br><br> 1 TiB x 1024 x 30 days x 730/30 hrs. x $0.000202/GiB/hr. = $151.00 <br><br> 3 TiB x 1024 x 30 days x 730/30 hrs. x $0.000082/GiB/hr. = $183.89 |
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| Network transfer cost | 20% of data read/write from cool tier | 3 TiB x 1024 x 20% x $0.020000/GiB = $12.29 |
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|**Fourth and subsequent monthly total**||**$498.18**|
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Your first six-month savings:
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* Cost without cool access: 5 TiB x 1024 x $0.000202/GiB/hr. x 730 hrs. x 6 months = $4,529.97
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* Cost with cool access:
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First month + Second month + … + Sixth month = (2 x $755.00) + $586.52 + (3 x $498.18) = $3,591.06
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* Savings using cool access: **20.73%**
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Your first 12-month savings:
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* Cost without cool access: 5 TiB x 1024 x $0.000202/GiB/hr. x 730 hrs. x 12 months = $9,059.94
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* Cost with cool access: First month + Second month + … + twelfth month = (2 x $755.00) + $586.52 + (9 x $498.18) = $6,580.14
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* Savings using cool access: **27.37%**
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#### Example 4:
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> [!TIP]
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> You can use the [Azure NetApp Files storage with cool access cost savings estimator](https://aka.ms/anfcoolaccesscalc) to interactively estimate cost savings based on changeable input parameters.
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:::image type="content" source="./media/cool-access-introduction/effective-price-calculator.png" alt-text="Diagram that shows the effective price calculator." lightbox="./media/cool-access-introduction/effective-price-calculator.png":::
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