edit pass: cool-access

Author: paulth1

articles/azure-netapp-files/cool-access-introduction.md

@@ -29,7 +29,7 @@ After data blocks are marked "cold," the tiering scan collects the blocks and pa
 > [!NOTE]
 > When you enable cool access, data that satisfies the conditions set by the coolness period moves to the cool tier. For example, if the coolness period is set to 30 days, any data that was cool for at least 30 days moves to the cool tier _when_ you enable cool access. 
 
-By `Default` (unless cool access retrieval policy is configured otherwise), data blocks on the cool tier that are read randomly again become "warm" and are moved back to the hot tier. After the data blocks are marked as "warm," they're again subjected to the temperature scan. Large sequential reads (like index and antivirus scans) on inactive data in the cool tier don't "warm" the data. They also don't trigger inactive data so that it moves back to the hot tier.
+By default (unless cool access retrieval policy is configured otherwise), data blocks on the cool tier that are read randomly again become "warm" and are moved back to the hot tier. After the data blocks are marked as "warm," they're again subjected to the temperature scan. Large sequential reads (like index and antivirus scans) on inactive data in the cool tier don't "warm" the data. They also don't trigger inactive data so that it moves back to the hot tier.
 
 Metadata is never cooled and always remains in the hot tier. Tiering doesn't affect the activities of metadata-intensive workloads like high file-count environments like chip design, version control systems, and home directories.
 
@@ -127,7 +127,7 @@ When you create volumes in the capacity pool and start tiering data to the cool
     * 0.5-TiB capacity at the hot tier rate.
     * 2 TiB of unallocated capacity at the hot tier rate.
     * 1.5-TiB capacity at the cool tier rate.
-    * Network transfer between the hot tier and the cool tier. The rate determined by the markup on top of the transaction cost (`GET`, `PUT`) on blob storage and private link transfer in either direction between the hot tiers.
+    * Network transfer between the hot tier and the cool tier. The markup on top of the transaction cost (`GET`, `PUT`) on blob storage and private link transfer in either direction between the hot tiers determines the rate.
 
 * Assume that you create one volume with 1 TiB. The volume has 0.25 TiB of the volume capacity on the hot tier and 0.75 of the volume capacity in the cool tier. The billing calculation is:
 
@@ -143,11 +143,11 @@ In these examples, assume that:
 
 * The hot tier storage cost is $0.000202/GiB/hr. The cool tier storage cost is $0.000082/GiB/hr.
 * Network transfer cost (including read or write activities from the cool tier) is $0.020000/GiB.
-* You have a 5-TiB capacity pool with cool access enabled.
-* You have 1 TiB of unallocated capacity within the capacity pool.
-* You have a 4-TiB volume enabled for cool access.
+* A 5-TiB capacity pool with cool access is enabled.
+* One TiB of unallocated capacity is within the capacity pool.
+* A 4-TiB volume is enabled for cool access.
 * After the coolness period, 3 TiB of the 4 TiB is moved to the cool tier.
-* You read or write 20% of data each month from the cool tier.
+* Each month, you read or write 20% of data from the cool tier.
 * Each month is 30 days or 730 hours. So each day is 730/30 hours.
 
 > [!IMPORTANT]
@@ -164,104 +164,104 @@ Your storage cost for the *first month*:
 
 | Cost | Description | Calculation |
 |---|---|---|
-| 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`  |
-| 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` |
-| 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` |
-| 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` |
-| **First month total** || **`$622.41`** |
+| 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  |
+| 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 |
+| 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 |
+| 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 |
+| **First month total** || **$622.41** |
 
 Your monthly storage cost for the *second and subsequent months*:
 
 | Cost | Description | Calculation |
 |---|---|---|
-| 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` |
-| Network transfer cost | 20% of data read/write from cool tier | `3 TiB x 1024 x 20% x $0.020000/GiB = $12.29` |
-| **Second and subsequent monthly total** || **`$498.18`** |
+| 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 |
+| Network transfer cost | 20% of data read/write from cool tier | 3 TiB x 1024 x 20% x $0.020000/GiB = $12.29 |
+| **Second and subsequent monthly total** || **$498.18** |
 
 Your first six-month savings:
 
-* Cost without cool access: `5 TiB x 1024 x $0.000202/GiB/hr. x 730 hrs. x 6 months = $4,529.97`
+* Cost without cool access: 5 TiB x 1024 x $0.000202/GiB/hr. x 730 hrs. x 6 months = $4,529.97
 * Cost with cool access:
-    `First month + Second month + … + Sixth month = $622.41 + (5x $498.18) = $3,113.31`
-* Savings using cool access: **`31.27%`**
+    First month + Second month + … + Sixth month = $622.41 + (5x $498.18) = $3,113.31
+* Savings using cool access: **31.27%**
 
 Your first 12-month savings:
 
-* Cost without cool access: `5 TiB x 1024 x $0.000202/GiB/hr. x 730 hrs. x 12 months = $9,059.94`
-* Cost with cool access: `First month + Second month + … + twelfth month = $622.41 + (11 x $498.18) = $6,102.39`
-* Savings using cool access: **`32.64%`**
+* Cost without cool access: 5 TiB x 1024 x $0.000202/GiB/hr. x 730 hrs. x 12 months = $9,059.94
+* Cost with cool access: First month + Second month + … + twelfth month = $622.41 + (11 x $498.18) = $6,102.39
+* Savings using cool access: **32.64%**
 
 #### Example 2: Coolness period is set to 35 days
 
 All 5 TiB is active data (in hot tier) for the first month. Your storage cost for the *first month*:
 
-`5 TiB x 1024 x 730hr. x $0.000202/GiB/hr. = $755.00`
+5 TiB x 1024 x 730hr. x $0.000202/GiB/hr. = $755.00
 
 Your storage cost for the *second month*:
 
 | Cost | Description | Calculation |
 |---|---|---|
-| 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` |
-| 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` |
-| 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` |
-| 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` |
-| **Second month total** || **`$604.47`** |
+| 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 |
+| 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 |
+| 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 |
+| 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 |
+| **Second month total** || **$604.47** |
 
 Your monthly storage cost for *third and subsequent months*:
 
 | Cost | Description | Calculation |
 |---|---|---|
-| 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` |
-| Network transfer cost | 20% of data read/write from cool tier | `3 TiB x 1024 x 20% x $0.020000/GiB = $12.29` |
-| **Third and subsequent monthly total** || **`$498.18`** |
+| 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 |
+| Network transfer cost | 20% of data read/write from cool tier | 3 TiB x 1024 x 20% x $0.020000/GiB = $12.29 |
+| **Third and subsequent monthly total** || **$498.18** |
 
 Your first six-month savings:
 
-* Cost without cool access: `5 TiB x 1024 x $0.000202/GiB/hr. x 730 hrs. x 6 months = $4,529.97`
+* Cost without cool access: 5 TiB x 1024 x $0.000202/GiB/hr. x 730 hrs. x 6 months = $4,529.97
 * Cost with cool access:
-    `First month + Second month + … + Sixth month = $755.00 + $604.47 + (4 x $498.18) = $3,352.19`
-* Savings using cool access: **`25.99%`**
+    First month + Second month + … + Sixth month = $755.00 + $604.47 + (4 x $498.18) = $3,352.19
+* Savings using cool access: **25.99%**
 
 Your first 12-month savings:
 
-* Cost without cool access: `5 TiB x 1024 x $0.000202/GiB/hr. x 730 hrs. x 12 months = $9,059.94`
-* Cost with cool access: `First month + Second month + … + twelfth month = $755.00 + $604.47 + (10 x $498.18) = $6,341.27`
-* Savings using cool access: **`30.00%`**
+* Cost without cool access: 5 TiB x 1024 x $0.000202/GiB/hr. x 730 hrs. x 12 months = $9,059.94
+* Cost with cool access: First month + Second month + … + twelfth month = $755.00 + $604.47 + (10 x $498.18) = $6,341.27
+* Savings using cool access: **30.00%**
 
 #### Example 3: Coolness period is set to 63 days
 
-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`
+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
 
 Your storage cost for the *third month*:
 
 | Cost | Description | Calculation |
 |---|---|---|
-| 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` |
-| 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` |
-| 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` |
-| 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` |
-| **Third month total** || **`$586.52`** |
+| 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 |
+| 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 |
+| 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 |
+| 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 |
+| **Third month total** || **$586.52** |
 
 Your monthly storage cost for the *fourth and subsequent months*:
 
 | Cost | Description | Calculation |
 |---|---|---|
-| 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` |
-| Network transfer cost | 20% of data read/write from cool tier | `3 TiB x 1024 x 20% x $0.020000/GiB = $12.29` |
-| **Fourth and subsequent monthly total** || **`$498.18`** |
+| 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 |
+| Network transfer cost | 20% of data read/write from cool tier | 3 TiB x 1024 x 20% x $0.020000/GiB = $12.29 |
+| **Fourth and subsequent monthly total** || **$498.18** |
 
 Your first six-month savings:
 
-* Cost without cool access: `5 TiB x 1024 x $0.000202/GiB/hr. x 730 hrs. x 6 months = $4,529.97`
+* Cost without cool access: 5 TiB x 1024 x $0.000202/GiB/hr. x 730 hrs. x 6 months = $4,529.97
 * Cost with cool access: 
-    `First month + Second month + … + Sixth month = (2 x $755.00) + $586.52 + (3 x $498.18) = $3,591.06`
-* Savings using cool access: **`20.73%`**
+    First month + Second month + … + Sixth month = (2 x $755.00) + $586.52 + (3 x $498.18) = $3,591.06
+* Savings using cool access: **20.73%**
 
 Your first 12-month savings:
 
-* Cost without cool access: `5 TiB x 1024 x $0.000202/GiB/hr. x 730 hrs. x 12 months = $9,059.94`
-* Cost with cool access: `First month + Second month + … + twelfth month = (2 x $755.00) + $586.52 + (9 x $498.18) = $6,580.14`
-* Savings using cool access: **`27.37%`**
+* Cost without cool access: 5 TiB x 1024 x $0.000202/GiB/hr. x 730 hrs. x 12 months = $9,059.94
+* Cost with cool access: First month + Second month + … + twelfth month = (2 x $755.00) + $586.52 + (9 x $498.18) = $6,580.14
+* Savings using cool access: **27.37%**
 
 > [!TIP]
 > 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.