From 7714089f8a5a23b617a709dae511543853399e6e Mon Sep 17 00:00:00 2001 From: Chris Lu Date: Tue, 11 Jun 2019 10:26:08 -0700 Subject: [PATCH] Updated Erasure Coding for warm storage (markdown) --- Erasure-Coding-for-warm-storage.md | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Erasure-Coding-for-warm-storage.md b/Erasure-Coding-for-warm-storage.md index 5041749..b5ea1cb 100644 --- a/Erasure-Coding-for-warm-storage.md +++ b/Erasure-Coding-for-warm-storage.md @@ -38,6 +38,8 @@ The scripts have 3 steps related to erasure coding. The default command is `ec.encode -fullPercent=95 -quietFor=1h`. It will find volumes at least 95% of the maximum volume size, which is usually 30GB, and have no updates for 1 hour. +Note: One collection can contain both normal volumes and erasure coded volumes, with write requests going to normal volumes. + ### Data Repair If disks fail or servers fail, some data shards are lost. With erasure coding, we can recover the lost data shards from the remaining data shards.