From: Gionatan Danti <g.danti@assyoma.it>
To: LVM general discussion and development <linux-lvm@redhat.com>
Cc: Eric Toombs <ewtoombs@uwaterloo.ca>
Subject: Re: [linux-lvm] faster snapshot creation?
Date: Tue, 25 Feb 2020 10:31:43 +0100 [thread overview]
Message-ID: <7c2966762598bf3ab8667bcd0b429464@assyoma.it> (raw)
In-Reply-To: <d5dd6c06-1e9f-3737-8712-137f92e351cb@uwaterloo.ca>
Il 2020-02-22 12:58 Eric Toombs ha scritto:
> So, is there a sort of "dumber" way of making these snapshots, maybe by
> changing the allocation algorithm or something?
Hi, I think that total snapshot creation time is dominated by LVM
flushing its (meta)data to the physical disks. Two things to try:
- use thin lvm snapshot (see man lvmthin);
- create a pv/vg/lv from a memory-backed loop device (ie: truncate
--size=1G /dev/shm/test.img; losetup -f /dev/shm/test.img; pvcreate
/dev/loop0 and so on...)
--
Danti Gionatan
Supporto Tecnico
Assyoma S.r.l. - www.assyoma.it [1]
email: g.danti@assyoma.it - info@assyoma.it
GPG public key ID: FF5F32A8
next prev parent reply other threads:[~2020-02-25 9:31 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-22 11:58 [linux-lvm] faster snapshot creation? Eric Toombs
2020-02-25 9:31 ` Gionatan Danti [this message]
2020-02-25 9:38 ` Zdenek Kabelac
2020-02-25 21:35 ` Eric Toombs
2020-02-26 10:01 ` Zdenek Kabelac
2020-02-26 14:03 ` Douglas Paul
2020-02-26 0:38 ` Stuart D. Gathman
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=7c2966762598bf3ab8667bcd0b429464@assyoma.it \
--to=g.danti@assyoma.it \
--cc=ewtoombs@uwaterloo.ca \
--cc=linux-lvm@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.