Viraj Jasani created HADOOP-18740: ------------------------------------- Summary: s3a prefetch cache blocks should be accessed by RW locks Key: HADOOP-18740 URL: https://issues.apache.org/jira/browse/HADOOP-18740 Project: Hadoop Common Issue Type: Sub-task Reporter: Viraj Jasani Assignee: Viraj Jasani
In order to implement LRU or LFU based cache removal policies for s3a prefetched cache blocks, it is important for all cache reader threads to acquire read lock and similarly cache file removal mechanism (fs close or cache eviction) to acquire write lock before accessing the files. As we maintain the block entries in an in-memory map, we should be able to introduce read-write lock per cache file entry, we don't need coarse-grained lock shared by all entries. This is a prerequisite to HADOOP-18291. -- This message was sent by Atlassian Jira (v8.20.10#820010) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org