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#134: Best Practices for OpenZFS L2ARC in the Era of NVMe
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Manage episode 273931201 series 1393477
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The ZFS L2ARC is now more than 10 years old. Over that time, a lot of secret incantations and tribal knowledge have been created by users, testers, developers, and the odd sales or marketing person. That collection of community wisdom informs the use and/or tuning of ZFS L2ARC for certain IO profiles, dataset sizes, server class, share protocols, and device types. In this talk, we will review a case study in which we tested a few of these L2ARC myths on an NVMe-capable OpenZFS storage appliance. Can high-speed NVMe flash devices keep L2ARC relevant in the face of ever-increasing memory capacity for ARC (primary cache) and all-flash storage pools? Learning Objectives: 1) Overview of ZFS L2ARC design goals and high level implementation details that pertain to our findings; 2) Performance characteristics of L2ARC during warming and when warmed, plus any tradeoffs or pitfalls with L2ARC in these states; 3) How to leverage NVMe as L2ARC devices to improve performance in a few storage use cases.
…
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146 episodes
MP3•Episode home
Manage episode 273931201 series 1393477
Content provided by SNIA Technical Council. All podcast content including episodes, graphics, and podcast descriptions are uploaded and provided directly by SNIA Technical Council or their podcast platform partner. If you believe someone is using your copyrighted work without your permission, you can follow the process outlined here https://player.fm/legal.
The ZFS L2ARC is now more than 10 years old. Over that time, a lot of secret incantations and tribal knowledge have been created by users, testers, developers, and the odd sales or marketing person. That collection of community wisdom informs the use and/or tuning of ZFS L2ARC for certain IO profiles, dataset sizes, server class, share protocols, and device types. In this talk, we will review a case study in which we tested a few of these L2ARC myths on an NVMe-capable OpenZFS storage appliance. Can high-speed NVMe flash devices keep L2ARC relevant in the face of ever-increasing memory capacity for ARC (primary cache) and all-flash storage pools? Learning Objectives: 1) Overview of ZFS L2ARC design goals and high level implementation details that pertain to our findings; 2) Performance characteristics of L2ARC during warming and when warmed, plus any tradeoffs or pitfalls with L2ARC in these states; 3) How to leverage NVMe as L2ARC devices to improve performance in a few storage use cases.
…
continue reading
146 episodes
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