From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-la0-f51.google.com ([209.85.215.51]:39553 "EHLO mail-la0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751765Ab3EZKAS (ORCPT ); Sun, 26 May 2013 06:00:18 -0400 Received: by mail-la0-f51.google.com with SMTP id lx15so5587412lab.24 for ; Sun, 26 May 2013 03:00:16 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: References: <1751895.r3q1HmeO0C@merkaba> Date: Sun, 26 May 2013 11:00:16 +0100 Message-ID: Subject: Re: Recommended settings for SSD From: Leonidas Spyropoulos To: Harald Glatt Cc: Martin Steigerwald , Duncan <1i5t5.duncan@cox.net>, "linux-btrfs@vger.kernel.org" Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-btrfs-owner@vger.kernel.org List-ID: On Sat, May 25, 2013 at 11:33 PM, Harald Glatt wrote: > Data that already exists will only be compressed on re-write. You can > do it with btrfs fi defrag and a script that traverses the fs to call > defrag on every file. Another good way is the find command that has > been outlined here: > > https://btrfs.wiki.kernel.org/index.php/Problem_FAQ#Defragmenting_a_directory_doesn.27t_work > I tried to my home partition the 'find' command and worked without errors, not sure if it did compress (how can I check?). I tried also on the root partition and every file that was in use (obviously) it didn't defrag it. I am guessing I have to mount the partition from a LiveCD but since the LiceCD kernel is usually old (in terms of btrfs) do you reckon there will be any problems? Thanks -- Caution: breathing may be hazardous to your health. #include int main(){printf("%s","\x4c\x65\x6f\x6e\x69\x64\x61\x73");}