ChenSammi commented on code in PR #8460: URL: https://github.com/apache/ozone/pull/8460#discussion_r2095529942
########## hadoop-hdds/docs/content/design/full-volume-handling.md: ########## @@ -0,0 +1,65 @@ +--- +title: Full Volume Handling +summary: Immediately trigger Datanode heartbeat on detecting full volume +date: 2025-05-12 +jira: HDDS-12929 +status: Design +author: Siddhant Sangwan, Sumit Agrawal +--- + +<!-- + 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. +--> + +## Summary +On detecting a full Datanode volume during write, immediately trigger a heartbeat containing the latest storage report. + +## Problem +When a Datanode volume is close to full, the SCM may not be immediately aware because storage reports are only sent +to it every thirty seconds. This can lead to the SCM allocating multiple blocks to containers on a full DN volume, +causing performance issues when the write fails. The proposal will partly solve this problem. Review Comment: Open containers report, not full container report. As only open container will grow its size. Other container's size will just shrink if there is any change. -- 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: issues-unsubscr...@ozone.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@ozone.apache.org For additional commands, e-mail: issues-h...@ozone.apache.org
