[ https://issues.apache.org/jira/browse/CASSANDRA-12104?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ariel Weisberg reassigned CASSANDRA-12104: ------------------------------------------ Assignee: Ariel Weisberg > Handle coalesce efforts for inter-dc traffic discretely from intra-dc traffic > ----------------------------------------------------------------------------- > > Key: CASSANDRA-12104 > URL: https://issues.apache.org/jira/browse/CASSANDRA-12104 > Project: Cassandra > Issue Type: Improvement > Reporter: Thom Valley > Assignee: Ariel Weisberg > Priority: Minor > > In relationship to CASSANDRA-8692, we have discovered that pushing coalescing > windows to the point where they have a positive impact on inter-dc traffic > overhead appears to have causes delays in intra-dc traffic (namely, quorum > requests between nodes). Having the same coalescing strategy apply to all > messages (especially intra-dc request/response messages) seems like a bad > idea. > This was in a 5 DC environment with from 30 to 130 ms of latency between the > DCs. Local network was entirely unrestricted 10G ethernet. > Being able to apply different coalescing rules to those two classifications > of traffic would allow much more effective tuning of the coalescing > strategies, save inter-dc bandwidth while not having any impact on intra-dc > message handling. -- This message was sent by Atlassian JIRA (v6.3.4#6332)