From a086b8cf6b6a61a1b7a39be1dcd85f1bcfc44ae1 Mon Sep 17 00:00:00 2001 From: Brian Warner Date: Thu, 21 Aug 2008 13:59:01 -0700 Subject: [PATCH] docs/filesystem-notes.txt: add notes about enabling the 'directory index' feature on ext3 filesystems for storage server lookup speed --- docs/filesystem-notes.txt | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100644 docs/filesystem-notes.txt diff --git a/docs/filesystem-notes.txt b/docs/filesystem-notes.txt new file mode 100644 index 00000000..34e02029 --- /dev/null +++ b/docs/filesystem-notes.txt @@ -0,0 +1,18 @@ + +Tahoe storage servers use a large number of subdirectories to store their +shares on local disk. This format is simple and robust, but depends upon the +local filesystem to provide fast access to those directories. + += ext3 = + +For moderate- or large-sized storage servers, you'll want to make sure the +"directory index" feature is enabled on your ext3 directories, otherwise +share lookup may be very slow. Recent versions of ext3 enable this +automatically, but older filesystems may not have it enabled. + +$ sudo tune2fs -l /dev/sda1 |grep feature +Filesystem features: has_journal ext_attr resize_inode dir_index filetype needs_recovery sparse_super large_file + +If "dir_index" is present in the "features:" line, then you're all set. If +not, you'll need to use tune2fs and e2fsck to enable and build the index. See +this page for some hints: http://wiki.dovecot.org/MailboxFormat/Maildir . -- 2.45.2