Amanda-Users

Re: Slow performance with dump + LVM

2007-01-24 03:03:08
Subject: Re: Slow performance with dump + LVM
From: Geert Uytterhoeven <geert AT linux-m68k DOT org>
To: Gene Heskett <gene.heskett AT verizon DOT net>
Date: Wed, 24 Jan 2007 08:51:14 +0100 (CET)
On Tue, 23 Jan 2007, Gene Heskett wrote:

> On Tuesday 23 January 2007 21:56, Ross Vandegrift wrote:
> >On Tue, Jan 23, 2007 at 01:01:38AM -0500, Gene Heskett wrote:
> >> Well, since dump works at the partition level, it may be that dump and
> >> LVM aren't compatible.  Switch to tar, which is file oriented & see
> >> what happens.
> >
> >Looks like I'm hitting nearly the same speed situation.  I backed up
> >7932MiB in 2460 seconds (I got impatient...) which comes out to about
> >3-4MiB/s.
> >
> >Since tar behaves the same way, I think I'm going to play around with
> >various record sizes when reading from LVM.  Something in the blokc
> >layer is shooting my transfer rates.
> 
> I don't think I'm having any troubles with tar in that regard, my 7-9GB 
> backups are all done in sub 1 hour times.

anakin$ units
2438 units, 71 prefixes, 32 nonlinear units

You have: 8 GB/hour
You want: MB/s
        * 2.2222222
        / 0.45

Gr{oetje,eeting}s,

                                                Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert AT linux-m68k 
DOT org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                                            -- Linus Torvalds

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