[SOLR-3715] improve tlog concurrency

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.0
• Assignee: Yonik Seeley
• Reporter: Yonik Seeley
• Created: 06/Aug/12 15:49
• Updated: 10/May/13 10:34
• Resolved: 18/Aug/12 00:18

Description

Right now log record serialization is synchronized. We can improve concurrency by serializing to a ram buffer outside synchronization. The cost will be RAM usage for buffering, and more complex concurrency in the tlog itself (i.e. we must ensure that a close does not happen without flushing all in-RAM buffers)