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Groups > comp.os.linux.hardware > #3144

Re: maximum number of partitions

From Scott Hemphill <hemphill@hemphills.net>
Newsgroups comp.os.linux.hardware
Subject Re: maximum number of partitions
References (14 earlier) <nj1at0$i32$1@dont-email.me> <nj1ccf$96q$1@dont-email.me> <nj1sei$iho$1@dont-email.me> <87lh2j5mdw.fsf@hemphills.net> <nj4069$vl9$1@dont-email.me>
Date 2016-06-06 10:32 -0400
Message-ID <87h9d65qxb.fsf@hemphills.net> (permalink)

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Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> writes:

> On Sun, 05 Jun 2016 17:58:03 -0400, Scott Hemphill wrote:
>> I would normally think of physical extents as the allocation unit for a
>> volume group.
>
> Thanks also for this explanation and the example which followed!
>
>> Voila!  I now had an 80GB root filesystem without rebooting
>> a production machine!
>
> Yes, I see the point with being able to easily expand file systems on 
> logical volumes. But IMHO the drawback of relying on this functionality 
> is that it might tempt you to place almost your entire directory tree on 
> a single file system.

Indeed, this is what I have done with this system.  But I have to manage
multiple systems, and this simplifies management.

> The importance of having a small root file system might not be as 
> important today with journaled file systems as it once used to be, but I 
> still think that it feels safe to know that I will most likely be able to 
> boot to single user mode and fsck all other file systems in case of power 
> outage.

I am not so worried about this case.  The system is running on a UPS,
and if necessary, I can restore the whole system from backup.  Also, the
hard drives I mentioned are actually virtual drives allocated as pieces
of a large RAID-6 array.

> Also, when different directory trees gets filled up to 100% different 
> kind of bad stuff will happen. If /var/log gets filled up you will no 
> longer get any logs... If /home gets filled up you will no longer be able 
> to start any new X applications... If / gets filled up you will no longer 
> be able to mount or umount any file systems.

This would be more of a concern to me if my system were a general
purpose timesharing system with multiple users.  In this case, I am the
only user, and the system serves just one purpose.  I ran out of space
because I changed the way I do offsite backups.

> If all your directory trees lives in the same file system and that file 
> system gets filled up all bad stuff will happen at once.
>
> My own / partition is 510 MB and that also includes the /boot directory. 
> My biggest partition is /var/images at 101G where I keep some iso- and hd-
> images I use with qemu.

I think we all have to balance risks with the costs of management, and
we will come up with different solutions based on our needs.

Scott
-- 
Scott Hemphill	hemphill@alumni.caltech.edu
"This isn't flying.  This is falling, with style."  -- Buzz Lightyear

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Thread

maximum number of partitions Haines Brown <haines@engels.histomat.net> - 2016-05-26 13:16 -0400
  Re: maximum number of partitions "Carlos E.R." <robin_listas@invalid.es> - 2016-05-26 20:22 +0200
    Re: maximum number of partitions Haines Brown <haines@engels.histomat.net> - 2016-05-26 16:02 -0400
      Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-05-26 21:02 +0000
        Re: maximum number of partitions "Carlos E.R." <robin_listas@invalid.es> - 2016-05-27 00:36 +0200
        Re: maximum number of partitions Haines Brown <haines@engels.histomat.net> - 2016-05-27 07:08 -0400
          Re: maximum number of partitions floyd@apaflo.com (Floyd L. Davidson) - 2016-05-27 04:03 -0800
            Re: maximum number of partitions Haines Brown <haines@engels.histomat.net> - 2016-05-27 09:25 -0400
              Re: maximum number of partitions floyd@apaflo.com (Floyd L. Davidson) - 2016-05-27 05:53 -0800
                Re: maximum number of partitions Haines Brown <haines@engels.histomat.net> - 2016-05-27 12:48 -0400
          Re: maximum number of partitions "Carlos E.R." <robin_listas@invalid.es> - 2016-05-27 14:50 +0200
  Re: maximum number of partitions Vilmos Soti <vilmos@soti.ca> - 2016-05-26 12:40 -0700
  Re: maximum number of partitions Marc Haber <mh+usenetspam1118@zugschl.us> - 2016-05-26 22:29 +0200
    LVM [was: maximum number of partitions] Haines Brown <haines@engels.histomat.net> - 2016-05-27 07:44 -0400
      Re: LVM [was: maximum number of partitions] Marc Haber <mh+usenetspam1118@zugschl.us> - 2016-05-27 18:07 +0200
  Re: maximum number of partitions Richard Kettlewell <rjk@greenend.org.uk> - 2016-05-26 22:27 +0100
    Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-05-27 06:05 +0000
      Re: maximum number of partitions Richard Kettlewell <rjk@greenend.org.uk> - 2016-05-27 08:36 +0100
        Re: maximum number of partitions "Carlos E.R." <robin_listas@invalid.es> - 2016-05-27 12:17 +0200
        Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-05-27 18:49 +0000
          Re: maximum number of partitions Robert Nichols <SEE_SIGNATURE@localhost.localdomain.invalid> - 2016-05-27 19:08 -0500
            Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-05-28 07:11 +0000
              Re: maximum number of partitions Robert Nichols <SEE_SIGNATURE@localhost.localdomain.invalid> - 2016-05-28 09:22 -0500
      Re: maximum number of partitions Aragorn <thorongil@telenet.be.invalid> - 2016-05-27 10:07 +0200
      Re: maximum number of partitions Marc Haber <mh+usenetspam1118@zugschl.us> - 2016-05-27 18:07 +0200
        Re: maximum number of partitions "Carlos E.R." <robin_listas@invalid.es> - 2016-05-27 20:30 +0200
          Re: maximum number of partitions Marc Haber <mh+usenetspam1118@zugschl.us> - 2016-05-28 00:05 +0200
            Re: maximum number of partitions "Carlos E.R." <robin_listas@invalid.es> - 2016-05-28 04:45 +0200
              Re: maximum number of partitions Marc Haber <mh+usenetspam1118@zugschl.us> - 2016-05-28 07:26 +0200
                Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-05-28 07:15 +0000
                Re: maximum number of partitions Marc Haber <mh+usenetspam1118@zugschl.us> - 2016-05-28 10:25 +0200
                Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-05-28 11:14 +0000
                Re: maximum number of partitions Marc Haber <mh+usenetspam1118@zugschl.us> - 2016-05-28 13:52 +0200
                Re: maximum number of partitions Aragorn <thorongil@telenet.be.invalid> - 2016-05-28 18:46 +0200
                Re: maximum number of partitions Marc Haber <mh+usenetspam1118@zugschl.us> - 2016-05-28 19:57 +0200
                Re: maximum number of partitions Aragorn <thorongil@telenet.be.invalid> - 2016-05-28 20:15 +0200
                Re: maximum number of partitions Bobbie Sellers <bliss-sf4ever@dslextreme.com> - 2016-05-28 12:04 -0700
                Re: maximum number of partitions Marc Haber <mh+usenetspam1118@zugschl.us> - 2016-05-28 22:47 +0200
                Re: maximum number of partitions Aragorn <thorongil@telenet.be.invalid> - 2016-05-29 07:36 +0200
                Re: maximum number of partitions "Carlos E.R." <robin_listas@invalid.es> - 2016-05-29 13:48 +0200
                Re: maximum number of partitions Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2016-06-04 09:50 +0200
                Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-06-05 10:10 +0000
                Re: maximum number of partitions Aragorn <thorongil@telenet.be.invalid> - 2016-06-05 14:31 +0200
                Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-06-05 13:53 +0000
                Re: maximum number of partitions Aragorn <thorongil@telenet.be.invalid> - 2016-06-05 16:18 +0200
                Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-06-05 18:53 +0000
                Re: maximum number of partitions Scott Hemphill <hemphill@hemphills.net> - 2016-06-05 17:58 -0400
                Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-06-06 14:09 +0000
                Re: maximum number of partitions Scott Hemphill <hemphill@hemphills.net> - 2016-06-06 10:32 -0400
                Re: maximum number of partitions Aragorn <thorongil@telenet.be.invalid> - 2016-06-06 16:48 +0200
                Re: maximum number of partitions Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2016-06-08 22:23 +0200
                Re: maximum number of partitions Richard Kettlewell <rjk@greenend.org.uk> - 2016-06-06 15:55 +0100
                Re: maximum number of partitions Aragorn <thorongil@telenet.be.invalid> - 2016-06-06 17:41 +0200
                Re: maximum number of partitions Richard Kettlewell <rjk@greenend.org.uk> - 2016-06-06 17:23 +0100
                Re: maximum number of partitions "Carlos E.R." <robin_listas@invalid.es> - 2016-06-06 22:36 +0200
                Re: maximum number of partitions Richard Kettlewell <rjk@greenend.org.uk> - 2016-06-06 21:51 +0100
                Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-06-07 04:54 +0000
                Re: maximum number of partitions Richard Kettlewell <rjk@greenend.org.uk> - 2016-06-07 08:43 +0100
                Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-06-07 19:04 +0000
                Re: maximum number of partitions Richard Kettlewell <rjk@greenend.org.uk> - 2016-06-07 20:30 +0100
                Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-06-08 07:08 +0000
                Re: maximum number of partitions Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2016-06-06 15:50 +0000
                Re: maximum number of partitions "Carlos E.R." <robin_listas@invalid.es> - 2016-06-05 16:03 +0200
                Re: maximum number of partitions noSpam@gmail.com - 2016-07-18 18:57 +0000
                Re: maximum number of partitions "Carlos E.R." <robin_listas@invalid.es> - 2016-05-28 17:10 +0200
                Re: maximum number of partitions Richard Kettlewell <rjk@greenend.org.uk> - 2016-05-28 18:07 +0100
                Re: maximum number of partitions "Carlos E.R." <robin_listas@invalid.es> - 2016-05-28 21:33 +0200
  Re: maximum number of partitions novinhael@gmail.com - 2017-02-07 18:10 -0800
    Re: maximum number of partitions Robert Nichols <SEE_SIGNATURE@localhost.localdomain.invalid> - 2017-02-08 07:58 -0600
    Re: maximum number of partitions faeychild <faeychild@nomail.afraid.org> - 2017-02-13 15:23 +1100
      Re: maximum number of partitions "Carlos E. R." <robin_listas@invalid.es> - 2017-02-13 08:04 +0100
    Re: maximum number of partitions "Carlos E. R." <robin_listas@invalid.es> - 2017-02-13 08:12 +0100

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