From: Eric Sandeen Subject: Re: File limit inside a single directory Date: Fri, 13 Feb 2015 11:28:34 -0600 Message-ID: <54DE3442.90707@redhat.com> References: <54DD0091.1050104@redhat.com>, Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Cc: "linux-ext4@vger.kernel.org" To: suntrop@web.de, Andreas Dilger Return-path: Received: from mx1.redhat.com ([209.132.183.28]:57763 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753615AbbBMR2i (ORCPT ); Fri, 13 Feb 2015 12:28:38 -0500 In-Reply-To: Sender: linux-ext4-owner@vger.kernel.org List-ID: On 2/13/15 10:49 AM, suntrop@web.de wrote: > Thanks guys. I was afraid of having a couple 100K (at most). The > server support team told me not to have more than 10 to 20K. There > seems to be a misconception (for me and people from the CMS) about > the 32K subdirectory limit, but this ins't for files/folders within a > single directory but rather nested directories like /1/2/3.../32000 You've confused things a bit here, FWIW. The 32k (well, 32000 because, sure) limit on ext3 is max link count; each subdirectory increases the link count on its parent, but only its parent. It's not about deep nesting, or about files in a dir. It's only about subdirs in a parent dir. # mkdir dir # stat dir | grep Links Device: fd06h/64774d Inode: 2490391 Links: 2 // . and .. entries # mkdir dir/subdir1 dir/subdir2 dir/subdir3 # stat dir | grep Links Device: fd06h/64774d Inode: 2490391 Links: 5 # mkdir dir/subdir1/subsubdir1 dir/subdir1/subsubdir2 dir/subdir1/subsubdir3 # stat dir | grep Links Device: fd06h/64774d Inode: 2490391 Links: 5 ext4 bumped that max to 64000, and just stops counting if that number gets exceeded... -Eric