ChenSammi commented on code in PR #6989: URL: https://github.com/apache/ozone/pull/6989#discussion_r3764793577
########## hadoop-hdds/docs/content/design/storage-policy.md: ########## @@ -0,0 +1,607 @@ +--- +title: Ozone Storage Policy Support +summary: Support storage policy in Ozone to write key data into specified types of storage media. +date: 2026-03-23 +jira: HDDS-11233 +status: draft +--- + +<!-- + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + http://www.apache.org/licenses/LICENSE-2.0 + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. See accompanying LICENSE file. +--> + +# Terminology + +## Definitions + +- Storage Policy: Defines where key data replicas should be stored in specific storage tiers. +- Storage Type: The type of each Datanode volume or container replica. Each Datanode volume can be configured with a + storage type, including SSD, DISK, and ARCHIVE. +- Storage Tier: A specific storage tier is composed of all replicas of a container based on their storage type. For + example, a 3-replica SSD tier consists of 3 replicas of SSD type. +- Volume: In this document, unless otherwise specified, a volume refers to the volume of a Datanode. +- Key: In this document, a key refers to an object in Ozone, including entries in both the KeyTable and FileTable. + +## Storage Policy vs Storage Type vs Storage Tier + + Review Comment: There is a typo in the png file, "Feedback Tier" -> Fallback Tier. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
