[Akonadi] [Bug 338402] New: File system cache is inneficient : too many file per directory

roucaries.bastien+bug at gmail.com roucaries.bastien+bug at gmail.com
Wed Aug 20 12:49:12 BST 2014


https://bugs.kde.org/show_bug.cgi?id=338402

            Bug ID: 338402
           Summary: File system cache is inneficient : too many file per
                    directory
           Product: Akonadi
           Version: 4.12
          Platform: Debian testing
                OS: Linux
            Status: UNCONFIRMED
          Severity: grave
          Priority: NOR
         Component: general
          Assignee: kdepim-bugs at kde.org
          Reporter: roucaries.bastien+bug at gmail.com

from https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=757844

~/.local/share/akonadi/file_db_data/ is completly inneficient and render the
whole system slow.

Directory shoud not store more than  a thousand of entry. With my multi
gigabyte mail box I have more than 900000 entry in this directory.

See
http://etutorials.org/Server+Administration/Squid.+The+definitive+guide/Chapter+7.+Disk+Cache+Basics/7.1+The+cache_dir+Directive/ 
paragraph 7.1.4 L1 and L2 for how to do.

thumbnail cache, git and squid use this technique.

I am tented to raise to RC severity because some filesystem does not support
this insane number of file per directory (see for instance ext3 limit here
https://www.mail-archive.com/cwelug@googlegroups.com/msg01944.htm)

Bastien

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