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https://issues.apache.org/jira/browse/HADOOP-19187?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17871406#comment-17871406
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ASF GitHub Bot commented on HADOOP-19187:
-----------------------------------------
anujmodi2021 commented on code in PR #6879:
URL: https://github.com/apache/hadoop/pull/6879#discussion_r1705871013
##########
hadoop-tools/hadoop-azure/src/site/markdown/fnsBlob.md:
##########
@@ -0,0 +1,80 @@
+<!---
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License. See accompanying LICENSE file.
+-->
+
+# ABFS Driver for FNS Accounts
+
+### Note: FNS-BLOB Support is being built and not yet ready for usage.
+
+## Background
+ABFS driver is recommended to be used only with HNS Enabled ADLS Gen-2 accounts
+for big data analytics because of being more performant and scalable.
+
+However, to enable users of legacy WASB Driver to migrate to ABFS driver
without
+needing them to upgrade their general purpose V2 accounts (HNS-Disabled),
Support
+for FNS accounts is being added to ABFS driver.
+Refer to [WASB Deprication](./wasb.html) for more details.
+
+## Azure Service Endpoints Used by ABFS Driver
+Azure Services offers two set of endpoints for interacting with storage
accounts:
+1. [Azure Blob
Storage](https://learn.microsoft.com/en-us/rest/api/storageservices/blob-service-rest-api)
referred as Blob Endpoint
+2. [Azure Data Lake
Storage](https://learn.microsoft.com/en-us/rest/api/storageservices/datalakestoragegen2/operation-groups)
referred as DFS Endpoint
+
+ABFS Driver by default is designed to work with DFS Endpoint only which
primarily
+supports HNS Enabled Accounts only. However, azure services does not
recommended
+to interact with FNS accounts using DFS Endpoint.
+
+To enable ABFS Driver to work with FNS Accounts, Support for Blob Endpoint is
being added.
+ABFS Driver will only allow FNS Accounts to be accessed using Blob Endpoint.
+HNS Enabled accounts will still use DFS Endpoint which continues to be the
+recommended stack based on performance and feature capabilities.
+
+## Configuring ABFS Driver for FNS Accounts
Review Comment:
That's a good point to improve our docs, but I was thinking this site page
is supposed to talk about FNS accounts only.
Do you suggest we add another page for HNS accounts? Something like
hns_dfs.md and talk about how to optimally configure HNS accounts with ABFS
driver?
> ABFS: [FnsOverBlob]Making AbfsClient Abstract for supporting both DFS and
> Blob Endpoint
> ---------------------------------------------------------------------------------------
>
> Key: HADOOP-19187
> URL: https://issues.apache.org/jira/browse/HADOOP-19187
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/azure
> Affects Versions: 3.4.0
> Reporter: Anuj Modi
> Assignee: Anuj Modi
> Priority: Major
> Labels: pull-request-available
>
> Azure Services support two different set of APIs.
> Blob:
> [https://learn.microsoft.com/en-us/rest/api/storageservices/blob-service-rest-api]
>
> DFS:
> [https://learn.microsoft.com/en-us/rest/api/storageservices/datalakestoragegen2/operation-groups]
>
> As per the plan in HADOOP-19179, this task enables ABFS Driver to work with
> both set of APIs as per the requirement.
> Scope of this task is to refactor the ABfsClient so that ABFSStore can choose
> to interact with the client it wants based on the endpoint configured by user.
> The blob endpoint support will remain "Unsupported" until the whole code is
> checked-in and well tested.
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