AWS fsx documentation change
Summary
Updated FlexCache documentation with expanded technical details about write modes (write-around/write-back), revised workflow descriptions, and restructured content organization
Security assessment
The changes focus on operational characteristics (write modes, performance considerations) and documentation structure. While write-back mode introduces asynchronous replication behavior, there's no mention of security controls, vulnerabilities, or mitigations. The changes describe functionality rather than addressing security flaws or introducing security features.
Diff
diff --git a/fsx/latest/ONTAPGuide/using-flexcache.md b/fsx/latest/ONTAPGuide/using-flexcache.md index 025a552b7..be0fa1726 100644 --- a//fsx/latest/ONTAPGuide/using-flexcache.md +++ b//fsx/latest/ONTAPGuide/using-flexcache.md @@ -5 +5 @@ -What FlexCache isCreating a FlexCache volume +How FlexCache worksFlexCache write modesFlexCache volume creation overview @@ -9 +9 @@ What FlexCache isCreating a FlexCache volume -Creating a cache is a space efficient, cost effective, and high-performance way to bring your datasets closer to clients requiring access. FlexCache is NetApp ONTAP’s remote caching capability that simplifies file distribution, reduces WAN latency, and lowers WAN bandwidth costs. It enables access to data across multiple sites, such as well as branch office access to corporate datasets.. When you create a FlexCache, initially only metadata of the origin file system is copied to the FlexCache. Because the metadata is much smaller than the overall dataset, it is copied to the FlexCache much quicker than a full copy and consumes only a fraction of the capacity. +FlexCache is NetApp ONTAP's remote caching capability that brings datasets closer to clients, improving access performance and reducing costs. It simplifies file distribution and reduces WAN costs. When you create a FlexCache volume, it initially copies only the metadata from the origin file system. This approach is faster and more space-efficient than a full data copy, consuming only a fraction of the storage capacity. @@ -11 +11 @@ Creating a cache is a space efficient, cost effective, and high-performance way -## What FlexCache is +## How FlexCache works @@ -13 +13 @@ Creating a cache is a space efficient, cost effective, and high-performance way -A FlexCache volume is a sparsely-populated volume on a local file system that is backed by a volume on a different, optionally remote, file system. FlexCache provides access to data in the backing volume (also called the origin volume) without requiring that a full copy of the data in the source (origin) volume. The source volume is referred to as the origin volume, and the destination volume is referred to as the FlexCache volume. +A FlexCache volume is a sparsely-populated cache that provides access to data stored in an origin volume. The cache can be located in a different, optionally remote, file system. Instead of copying all data from the origin volume, FlexCache copies data only as needed. FlexCache volumes are best suited for read-intensive workflows with infrequent data changes because any changes to the origin data require the cache to be refreshed. @@ -15,3 +15 @@ A FlexCache volume is a sparsely-populated volume on a local file system that is -Because the cached data on the FlexCache volume has to be ejected when the data is changed, FlexCache volumes work best for workflows in which the data is being read a large majority of the time, and does not change very often. - -You can use FlexCache with Amazon FSx for NetApp ONTAP in the following configurations: +You can use FlexCache with FSx for ONTAP in the following configurations: @@ -25 +23,11 @@ FSx for ONTAP | FSx for ONTAP -## Creating a FlexCache volume +## FlexCache write modes + +FlexCache volumes support two modes of operation for write operations: write-around mode and write-back mode. + +In write-around mode, which is the default mode, writes are forwarded from the cache to the origin volume. The write operation isn't acknowledged to the client until after the data is committed to storage at the origin volume and the origin acknowledges the write back to the cache. Because each write must traverse the network between the cache and origin, this mode has higher latency than write-back mode. + +In write-back mode, introduced in ONTAP 9.15.1, writes are committed to storage at the cache location and immediately acknowledged to the client. The data is then asynchronously written to the origin volume. This mode enables writes to perform at near-local speeds, which can significantly improve performance for distributed workloads. + +Use write-back mode for write-heavy workloads that require low-latency cache writes. Use write-around mode for read-heavy workloads that are not latency-sensitive, or when your origin file system has more than 10 FlexCache origin volumes. + +## FlexCache volume creation overview @@ -27 +35 @@ FSx for ONTAP | FSx for ONTAP -Creating a FlexCache volume from an origin volume involves completing the following high-level tasks: +Creating a FlexCache volume consists of the following steps: @@ -29 +37 @@ Creating a FlexCache volume from an origin volume involves completing the follow - * Gather source and destination logical interfaces (LIFs). + * Gather source and destination logical interfaces (LIFs) @@ -31 +39 @@ Creating a FlexCache volume from an origin volume involves completing the follow - * Establish cluster peering between the origin and cache file systems, or clusters. + * Establish cluster peering between the origin and cache file systems @@ -33 +41 @@ Creating a FlexCache volume from an origin volume involves completing the follow - * Create a storage virtual machine (SVM) peering relationship between the origin and cache SVMs. + * Create a storage virtual machine (SVM) peering relationship @@ -35 +43 @@ Creating a FlexCache volume from an origin volume involves completing the follow - * Create the FlexCache volume on the cache SVM. + * Create the FlexCache volume and select a write mode @@ -37 +45 @@ Creating a FlexCache volume from an origin volume involves completing the follow - * Mount the FlexCache volume on the clients requiring access. + * Mount the FlexCache volume on your clients @@ -42 +50 @@ Creating a FlexCache volume from an origin volume involves completing the follow -For more information, including detailed instructions on how to successfully accomplish each of these tasks, see [Creating a FlexCache](./create-flexcache.html). +For detailed instructions, see [Creating a FlexCache](./create-flexcache.html).