[ https://issues.apache.org/jira/browse/IO-278 ]
Apoorva Maheshwari deleted comment on IO-278: --------------------------------------- was (Author: JIRAUSER288635): Issue is still present in version 2.7. As it is in reopen state, Kindly confirm if it is being planned to fix in upcoming release. > Improve Tailer performance with buffered reads > ---------------------------------------------- > > Key: IO-278 > URL: https://issues.apache.org/jira/browse/IO-278 > Project: Commons IO > Issue Type: Improvement > Affects Versions: 2.0.1 > Reporter: Sergio Bossa > Priority: Major > Fix For: 2.4 > > Attachments: Tailer.diff, TailerTest.diff > > > I noticed Tailer read performances are pretty poor when dealing with large, > frequently written, log files, and this is due to the use of RandomAccessFile > which does unbuffered reads, hence causing lots of disk I/O. > So I improved the Tailer implementation by introducing buffered reads: it > works by loading large (configurable) file chunks in memory, and reading > lines from there; this enhances performances in my tests from 10x to 30x > depending on the file size. > I also added two test cases: one to simulate reading of a large file (you can > use it to compare performances), the other to verify correct handling on > buffer breaks; obviously, all tests pass. > I'm attaching the diff files, let me know if it's okay for you guys! -- This message was sent by Atlassian Jira (v8.20.7#820007)