From 6a560129913d00e67359fffbdc275ea014efec0e Mon Sep 17 00:00:00 2001 From: Derek Su Date: Tue, 20 Jun 2023 13:46:02 +0800 Subject: [PATCH] spdk: update descriptions of settings Signed-off-by: Derek Su --- content/docs/1.5.0/references/settings.md | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/content/docs/1.5.0/references/settings.md b/content/docs/1.5.0/references/settings.md index f5a276026..8767c1e53 100644 --- a/content/docs/1.5.0/references/settings.md +++ b/content/docs/1.5.0/references/settings.md @@ -401,19 +401,21 @@ The value in seconds specifies the timeout of the HTTP client to the replica's f > Default: `false` -This allows users to activate the v2 data engine based on SPDK. Currently, it is in the preview phase and should not be utilized in a production environment. +This allows users to activate the v2 data engine based on SPDK. Currently, it is in the preview phase and should not be utilized in a production environment. For more information, please refer to [V2 Data Engine (Preview Feature)](../../spdk). > **Warning** > > - DO NOT CHANGE THIS SETTING WITH ATTACHED VOLUMES. Longhorn will block this setting update when there are attached volumes. > > - When applying the setting, Longhorn will restart all instance-manager pods. +> +> - When the V2 Data Engine is enabled, each instance-manager pod utilizes 1 CPU core. This high CPU usage is attributed to the spdk_tgt process running within each instance-manager pod. The spdk_tgt process is responsible for handling input/output (IO) operations and requires intensive polling. As a result, it consumes 100% of a dedicated CPU core to efficiently manage and process the IO requests, ensuring optimal performance and responsiveness for storage operations. #### Offline Replica Rebuilding > Default: `enabled` -This setting allows users to enable the offline replica rebuilding for volumes using v2 data engine. +This setting allows users to enable the offline replica rebuilding for volumes using v2 data engine. For more information, please refer to [Automatic Offline Replica Rebuilding](../../spdk/automatic-offline-replica-rebuilding). Here are the available options: - `enabled`