Update toc.md

toc.md

@@ -446,21 +446,27 @@ You can also use Grafana to visualize your data from Log Analytics.
 ## Cost Management, Chargeback and Analysis
 
 This section will focus on Azure Databricks billing, tools to manage and analyze cost and how to charge back to the team. 
+
 Azure Databricks Billing: 
 First, it is important to understand the different workloads and tiers available with Azure Databricks. Azure Databricks is available in 2 tiers – Standard and Premium. Premium Tier offers additional features on top of what is available in Standard tier. These include Role-based access control for notebooks, jobs, and tables, Audit logs, Azure AD conditional pass-through, conditional authentication and many more. Please refer to https://azure.microsoft.com/en-us/pricing/details/databricks/ for the complete list. 
-Both Premium and Standard tier come with 3 types of workload
-•	Jobs Compute (previously called Data Engineering)
-•	Jobs Light Compute (previously called Data Engineering Light)
-•	All-purpose Compute (previously called Data Analytics)
+
+Both Premium and Standard tier come with 3 types of workload:
+
+1. Jobs Compute (previously called Data Engineering)
+2. Jobs Light Compute (previously called Data Engineering Light)
+3. All-purpose Compute (previously called Data Analytics)
 The Jobs Compute and Jobs Light Compute make it easy for data engineers to build and execute jobs, and All-purpose make it easy for data scientists to explore, visualize, manipulate, and share data and insights interactively. Depending upon the use-case, one can also use All-purpose Compute for data engineering or automated scenarios especially if the incoming job rate is higher. 
-When you create an Azure Databricks workspace and spin up a cluster, below resources are consumed 
-•	DBUs – A DBU is a unit of processing capability, billed on a per-second usage
-•	Virtual Machines – These represent your Databricks clusters that run the Databricks Runtime
-•	Public IP Addresses – These represent the IP Addresses consumed by the Virtual Machines when the cluster is running
-•	Blob Storage – Each workspace comes with a default storage
-•	Managed Disk
-•	Bandwidth – Bandwidth charges for any data transfer
-Service/Resource	Pricing
+
+When you create an Azure Databricks workspace and spin up a cluster, below resources are consumed: 
+
+1. DBUs – A DBU is a unit of processing capability, billed on a per-second usage
+2. Virtual Machines – These represent your Databricks clusters that run the Databricks Runtime
+3. Public IP Addresses – These represent the IP Addresses consumed by the Virtual Machines when the cluster is running
+4. Blob Storage – Each workspace comes with a default storage
+5. Managed Disk
+6. Bandwidth – Bandwidth charges for any data transfer
+
+Service/Resource Pricing" 
 DBUs	https://azure.microsoft.com/en-us/pricing/details/databricks/
 VMs	https://azure.microsoft.com/en-us/pricing/details/databricks/
 Public IP Addresses	https://azure.microsoft.com/en-us/pricing/details/ip-addresses/
@@ -469,32 +475,38 @@ Managed Disk	https://azure.microsoft.com/en-us/pricing/details/managed-disks/
 Bandwidth	https://azure.microsoft.com/en-us/pricing/details/bandwidth/
 
 In addition, if you use additional services as part of your end-2-end solution, such as Azure CosmosDB, or Azure Event Hub, then they are charged per their pricing plan. 
-Per the details in Azure Databricks pricing page, there are 2 options 
+Per the details in Azure Databricks pricing page, there are 2 options:
+
 1.	Pay as you go – Pay for the DBUs as you use: Refer to the pricing page for the DBU prices based on the SKU. Note: The DBU per hour price for different SKUs differs across Azure public cloud, Azure Gov and Azure China region. 
 
 2.	Pre-purchase or Reservations – You can get up to 37% savings over pay-as-you-go DBU when you pre-purchase Azure Databricks Units (DBU) as Databricks Commit Units (DBCU) for either 1 or 3 years. A Databricks Commit Unit (DBCU) normalizes usage from Azure Databricks workloads and tiers into to a single purchase. Your DBU usage across those workloads and tiers will draw down from the Databricks Commit Units (DBCU) until they are exhausted, or the purchase term expires. The draw down rate will be equivalent to the price of the DBU, as per the table above. Refer to the pricing page for the pre-purchase pricing. 
-Since, you are also billed for the VMs, you have both the above options for VMs as well
+
+Since, you are also billed for the VMs, you have both the above options for VMs as well:
 1.	Pay as you go 
 2.	Reservations - https://azure.microsoft.com/en-us/pricing/reserved-vm-instances/ 
 Below are few examples of a billing for Azure Databricks with Pay as you go
 Depending on the type of workload your cluster runs, you will either be charged for Jobs Compute, Jobs Light Compute, or All-purpose Compute workload. For example, if the cluster runs workloads triggered by the Databricks jobs scheduler, you will be charged for the Jobs Compute workload. If your cluster runs interactive features such as ad-hoc commands, you will be billed for All-purpose Compute workload.
+
 Accordingly, the pricing will be dependent on below components
 1.	DBU SKU – DBU price based on the workload and tier
 2.	VM SKU – VM price based on the VM SKU
 3.	DBU Count – Each VM SKU has an associated DBU count. Example – D3v2 has DBU count of 0.75
 4.	Region
 5.	Duration
-•	If you run Premium tier cluster for 100 hours in East US 2 with 10 DS13v2 instances, the billing would be the following for All-purpose Compute:
-•	VM cost for 10 DS13v2 instances —100 hours x 10 instances x $0.598/hour = $598
-•	DBU cost for All-purpose Compute workload for 10 DS13v2 instances —100 hours x 10 instances x 2 DBU per node x $0.55/DBU = $1,100
-•	The total cost would therefore be $598 (VM Cost) + $1,100 (DBU Cost) = $1,698.
-•	If you run Premium tier cluster for 100 hours in East US 2 with 10 DS13v2 instances, the billing would be the following for Jobs Compute workload:
-•	VM cost for 10 DS13v2 instances —100 hours x 10 instances x $0.598/hour = $598
-•	DBU cost for Jobs Compute workload for 10 DS13v2 instances —100 hours x 10 instances x 2 DBU per node x $0.30/DBU = $600
-•	The total cost would therefore be $598 (VM Cost) + $600 (DBU Cost) = $1,198.
+
+*	If you run Premium tier cluster for 100 hours in East US 2 with 10 DS13v2 instances, the billing would be the following for All-purpose Compute:
+*	VM cost for 10 DS13v2 instances —100 hours x 10 instances x $0.598/hour = $598
+*	DBU cost for All-purpose Compute workload for 10 DS13v2 instances —100 hours x 10 instances x 2 DBU per node x $0.55/DBU = $1,100
+*	The total cost would therefore be $598 (VM Cost) + $1,100 (DBU Cost) = $1,698.
+*	If you run Premium tier cluster for 100 hours in East US 2 with 10 DS13v2 instances, the billing would be the following for Jobs Compute workload:
+*	VM cost for 10 DS13v2 instances —100 hours x 10 instances x $0.598/hour = $598
+*	DBU cost for Jobs Compute workload for 10 DS13v2 instances —100 hours x 10 instances x 2 DBU per node x $0.30/DBU = $600
+*	The total cost would therefore be $598 (VM Cost) + $600 (DBU Cost) = $1,198.
 In addition to VM and DBU charges, there will be additional charges for managed disks, public IP address, bandwidth, or any other resource such as Azure Storage, Azure Cosmos DB depending on your application.
+
 Azure Databricks Trial: If you are new to Azure Databricks, you can also use a Trial SKU that gives you free DBUs for Premium tier for 14 days. You will still need to pay for other resources like VM, Storage etc. that are consumed during this period. After the trial is over, you will need to start paying for the DBUs.  
-Chargeback scenarios
+
+Chargeback scenarios:
 There are 2 broad scenarios we have seen with respect to chargeback internal teams for sharing Databricks resources
 1.	Chargeback across a single Azure Databricks workspace: In this case, a single workspace is shared across multiple teams and user would like to chargeback the individual teams. Individual teams would use their own Databricks cluster and can be charged back at cluster level.
 2.	Chargeback across multiple Databricks workspace: In this case, teams use their own workspace and would like to chargeback at workspace level. 
@@ -513,14 +525,16 @@ In addition to the default tags, customers can add custom tags to the resources
 1.	Cluster Tags : You can create custom tags as key-value pairs when you create a cluster, and Azure Databricks applies these tags to underlying cluster resources – VMs, DBUs, Public IP Addresses, Disks. 
 2.	Pool Tags : You can create custom tags as key-value pairs when you create a pool, and Azure Databricks applies these tags to underlying pool resources – VMs, Public IP Addresses, Disks. Pool-backed clusters inherit default and custom tags from the pool configuration. 
 3.	Workspace Tags: You can create custom tags as key-value pairs when you create an Azure Databricks workspaces. These tags apply to underlying resources within the workspace – VMs, DBUs, and others. 
-Please see below on how tags propagate for DBUs and VMs
+
+Please see below on how tags propagate for DBUs and VMs:
 1.	Clusters created from pools
-a.	DBU Tag = Workspace Tag + Pool Tag + Cluster Tag
-b.	VM Tag = Workspace Tag + Pool Tag
+  a.	DBU Tag = Workspace Tag + Pool Tag + Cluster Tag
+  b.	VM Tag = Workspace Tag + Pool Tag
 2.	Clusters not from Pools
-a.	DBU Tag = Workspace Tag + Cluster Tag
-b.	VM Tag = Workspace Tag + Cluster Tag 
+  a.	DBU Tag = Workspace Tag + Cluster Tag
+  b.	VM Tag = Workspace Tag + Cluster Tag 
 These tags (default and custom) propagate to Cost Analysis Reports that you can access in the Azure Portal. The below section will explain how to do cost/usage analysis using these tags.
+
 Cost/Usage Analysis
 The Cost Analysis report is available under Cost Management within Azure Portal. Please refer to Cost Management section to get a detailed overview on how to use Cost Management.  
  
@@ -574,10 +588,10 @@ Following are the key things to note about pre-purchase plan
 2.	To view the overall consumption for pre-purchase, you can find it in Azure Portal by going to Reservations page. If you have multiple Reservations, you can find all of them in under Reservations in Azure Portal. This will allow one to track to-date usage of different reservations separately. Please see Reservations page on how to access this information from various tools including REST API, PowerShell, and CLI. 
  
 3.	To get the detailed utilized and reports (like Pay as you go), the same Cost Management section above would apply with few below changes
-a.	Use the field Amortized Cost instead of Actual Cost in Azure Portal 
-b.	For EA, and Modern customers, the Meter Name would reflect the exact DBU workload and tier in the cost reports. The report would also show the exact tier of reservation – as 1 year or 3 year. One would still need to download the same Usage Details Version 2 report as mentioned here or use the Power BI Cost Management connector. For Web, and Direct customers, the product and meter name would show as Azure Databricks Reservations-DBU and DBU respectively. To identify the workload SKU, you can find the MeterID under “additionalinfo” as consumption meter. 
+  a.	Use the field Amortized Cost instead of Actual Cost in Azure Portal 
+  b.	For EA, and Modern customers, the Meter Name would reflect the exact DBU workload and tier in the cost reports. The report would also show the exact tier of reservation – as 1 year or 3 year. One would still need to download the same Usage Details Version 2 report as mentioned here or use the Power BI Cost Management connector. For Web, and Direct customers, the product and meter name would show as Azure Databricks Reservations-DBU and DBU respectively. To identify the workload SKU, you can find the MeterID under “additionalinfo” as consumption meter. 
 4.	For Web and Direct customers, one can calculate the normalized consumption for DBCUs using the below steps:
-a.	Refer to this table to get the Cost Management Ratio
+  a.	Refer to this table to get the Cost Management Ratio
 Key Things to Note:
 1. Cost is shown as 0 for the reservation. That is because the reservation is pre-paid. To calculate cost, one needs to start by looking at "consumedquantity"
 2. meterid changes from the SKU-based IDs, to a reservation specific meterid