From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from plane.gmane.org ([80.91.229.3]:55414 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753685Ab3EIKLM (ORCPT ); Thu, 9 May 2013 06:11:12 -0400 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1UaNoa-0008Ra-Ny for linux-btrfs@vger.kernel.org; Thu, 09 May 2013 12:11:08 +0200 Received: from cpc21-stap10-2-0-cust974.12-2.cable.virginmedia.com ([86.0.163.207]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 09 May 2013 12:11:08 +0200 Received: from m_btrfs by cpc21-stap10-2-0-cust974.12-2.cable.virginmedia.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 09 May 2013 12:11:08 +0200 To: linux-btrfs@vger.kernel.org From: Martin Subject: How many subvols/snapshots are possible? (limits?) Date: Thu, 09 May 2013 11:10:56 +0100 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-btrfs-owner@vger.kernel.org List-ID: Dear Devs, This is more a use case question of what is a good idea to do... Can btrfs support snapshots of the filesystem at very regular intervals, say minute by minute or even second by second? Or are there limits that will be hit with metadata overheads or links/reference limits or CPU overheads if 'too many' snapshots/subvols are made? If snapshots were to be taken once a minute and retained, what breaks first? What are 'reasonable' (maximum) numbers for frequency and number of held versions? Thanks, Martin