From 78d108b6bc2646987f43561b0119f09cf07429f5 Mon Sep 17 00:00:00 2001 From: Chris Lu Date: Mon, 1 Mar 2021 21:35:54 -0800 Subject: [PATCH] Updated Tiered Storage (markdown) --- Tiered-Storage.md | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Tiered-Storage.md b/Tiered-Storage.md index e6f07af..059cd4c 100644 --- a/Tiered-Storage.md +++ b/Tiered-Storage.md @@ -1,6 +1,14 @@ All read and write operation for volume data is O(1) disk seek. However, there are fast, slow, and remote storages. Since data that are hot, warm, and cold, it would be cost-efficient to place data accordingly. +``` + + => NVME => SATA SSD => Fast HDD => Slow HDD => Cloud + + => Critical => Hot => Less Hot => Warm => Cold + +``` + # Speed up volume index To write any data, the volume index needs to append one entry. To read any data, the volume index lookup is required. The volume index can be in memory mode or an LevelDB instance. The amount of index content is small while it is accessed frequently.