Vladimir Ozerov created IGNITE-4270: ---------------------------------------
Summary: Hadoop: optionally stripe mapper output for every partition. Key: IGNITE-4270 URL: https://issues.apache.org/jira/browse/IGNITE-4270 Project: Ignite Issue Type: Task Components: hadoop Affects Versions: 1.8 Reporter: Vladimir Ozerov Assignee: Vladimir Ozerov Fix For: 2.0 Currently we have R maps for M mappers, where R is number of reducers. For this reason many mappers writes to concurrent offheap data structure, loosing time on concurrency burden. Let's add an option to create R * M maps, so that every mapper has dedicated map for every reducer. This will eliminate almost all concurrency overhead. -- This message was sent by Atlassian JIRA (v6.3.4#6332)