jvarenina edited a comment on pull request #7378: URL: https://github.com/apache/geode/pull/7378#issuecomment-1048513322
Hi reviewers, With this solution, each server will now send CacheServerLoadMessage containing the correct connection load of the gateway-receiver to all locators in the cluster. This action will happen every 5 seconds as configured with the load-poll-interval parameter. Additionally, the coordinator locator will increase the load each time it provides the server location to the remote gateway-sender in ClientConnectionRequest/ClientConnectionResponse. Locator only maintains load temporarily until CacheServerLoadMessage is received. This behavior makes sense as the server tracks connection load more accurately than the locator. Locator only increases connection load based on the received connection requests while server adjusts the connection load each time connection is established and disconnected. ClientConnectionRequest messages are usually sent to the locator in bursts when the gateway-sender is establishing connections due to traffic. This behavior results in the locator's connection load being way ahead of the server connection load because servers did not establish those connections yet. Suppose during these bursts CacheServerLoadMessage message come to locator carrying low load value for one of the gateway-receivers. In that case, that receiver will be picked more frequently (will have the lowest load), resulting in unbalanced gateway-sender connections. In order for this to have a big impact on load-balancing of sender connections the gateway-receivers must be started with some small delay, so that CacheServerLoadMessages are sent with some delay that is enough to cause imbalance. If CacheServerLoadMessages were sent at the similar time then this would not be a problem as all messages would have similar load and would update locator at similar time. I would be really grateful if you could share your opinion on this matter? -- 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: notifications-unsubscr...@geode.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
