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articles/azure-netapp-files/solutions-benefits-azure-netapp-files-oracle-database.md

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ms.tgt_pltfrm: na
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ms.devlang: na
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ms.topic: conceptual
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ms.date: 04/20/2020
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ms.date: 04/23/2020
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ms.author: b-juche
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---
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# Benefits of using Azure NetApp Files with Oracle Database
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## How Oracle Direct NFS works
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Oracle Direct NFS (dNFS) bypasses the operating system’s buffer cache. Data is cached only once in the user space, eliminating the overhead of memory copies.
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The following summary explains how Oracle Direct NFS works at a high level:
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The traditional NFS client uses a single network flow, as the following example shows:
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* Oracle Direct NFS bypasses the operating system buffer cache. Data is cached only once in the user space, eliminating the overhead of memory copies.
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![Traditional NFS client using a single network flow](../media/azure-netapp-files/solutions-traditional-nfs-client-using-single-network-flow.png)
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* The traditional NFS client uses a single network flow as shown below:
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In contrast, Oracle dNFS improves performance by load-balancing network traffic across multiple network flows. This capability enables the Oracle database to dynamically establish a significant number of 650 distinct network connections, as shown in the example below:
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![Traditional NFS client using a single network flow](../media/azure-netapp-files/solutions-traditional-nfs-client-using-single-network-flow.png)
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![Oracle Direct NFS improving performance](../media/azure-netapp-files/solutions-oracle-direct-nfs-performance-load-balancing.png)
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Oracle Direct NFS further improves performance by load-balancing network traffic across multiple network flows. As tested and shown below, 650 distinct network connections were established dynamically by the Oracle Database:
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![Oracle Direct NFS improving performance](../media/azure-netapp-files/solutions-oracle-direct-nfs-performance-load-balancing.png)
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The [Oracle FAQ for Direct NFS](http://www.orafaq.com/wiki/Direct_NFS) shows that Oracle dNFS is an optimized NFS client. It provides fast and scalable access to NFS storage that is located on NAS storage devices (accessible over TCP/IP). dNFS is built into the database kernel just like ASM, which is used primarily with DAS or SAN storage. As such, *the guideline is to use dNFS when implementing NAS storage and use ASM when implementing SAN storage.*
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