Public bug reported: I use Ubuntu 16.04 LTS on a mail server with many users and configured fail2ban to reject spammers and attackers.
When the server is under load fail2ban has high cpu usage, but most notably a high write to disk. This inherently slows the system and put high stress to disks, trying to find the cause I found this mailing list thread: https://sourceforge.net/p/fail2ban/mailman/message/35961119/ on which SSD suffers the pain of this write amplification caused by sqlite database, this is a major trouble for SSD, but any system is hit by the performance degradation. The fix can be found on https://github.com/fail2ban/fail2ban/pull/1436/files and since Ubuntu 16.04 will be supported until 2021, this should be back-ported. ** Affects: fail2ban (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1706085 Title: fail2ban excessive write amplification of sqlite To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/fail2ban/+bug/1706085/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
