From: Lukas Czerner <lczerner@redhat.com>
To: Theodore Ts'o <tytso@mit.edu>
Cc: Ext4 Developers List <linux-ext4@vger.kernel.org>,
darrick.wong@oracle.com
Subject: Re: [PATCH 7/9] e2scrub_all: make sure there's enough free space for a snapshot
Date: Thu, 21 Mar 2019 12:18:56 +0100 [thread overview]
Message-ID: <20190321111856.gsbdc6gv3bfehion@work> (raw)
In-Reply-To: <20190321020218.5154-7-tytso@mit.edu>
On Wed, Mar 20, 2019 at 10:02:16PM -0400, Theodore Ts'o wrote:
> If there isn't, skip the volume so we don't spam the system
> administrator with error messages. It's quite commkon that there is
> is zero free space in the volume group.
>
> Addresses-Debian-Bug: #924301
>
> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
> ---
> scrub/e2scrub_all.in | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/scrub/e2scrub_all.in b/scrub/e2scrub_all.in
> index 8bc868aa0..4cb90a0de 100644
> --- a/scrub/e2scrub_all.in
> +++ b/scrub/e2scrub_all.in
> @@ -21,6 +21,7 @@
> PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
>
> scrub_all=0
> +snap_size_mb=256
> conffile="@root_sysconfdir@/e2scrub.conf"
>
> test -f "${conffile}" && . "${conffile}"
> @@ -108,6 +109,9 @@ ls_scrub_targets() {
> eval "${lvm_vars}"
> echo "${LVM2_LV_ROLE}" | grep -q "snapshot" && continue
>
> + free_space="$(vgs -o vg_free --units m --noheadings --no-suffix "${LVM2_VG_NAME}" 2> /dev/null | sed -e 's/\..*//')"
> + test "${snap_size_mb}" -gt "${free_space}" && continue
So you're going to be calling vgs for every lvs even though you can have
a whole bunch of them in the same vg. That's not very efficient.
You can just filter it out with the lvs at the start of the loop by
adding the proper select string.
-S vg_free\>${snap_size_mb}
-Lukas
> +
> if [ -n "${MOUNTPOINT}" ]; then
> echo "${MOUNTPOINT}"
> else
> --
> 2.19.1
>
next prev parent reply other threads:[~2019-03-21 11:19 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-21 2:02 [PATCH 1/9] e2scrub: check to make sure lvm2 is installed Theodore Ts'o
2019-03-21 2:02 ` [PATCH 2/9] debian: drop lvm2 from the recommends line Theodore Ts'o
2019-03-21 3:57 ` Darrick J. Wong
2019-03-21 2:02 ` [PATCH 3/9] Fix "make install-strip" Theodore Ts'o
2019-03-21 2:02 ` [PATCH 4/9] e2scrub: fix up "make install-strip" support Theodore Ts'o
2019-03-21 2:02 ` [PATCH 5/9] e2fscrub: add the -n option which shows what commands e2scrub would execute Theodore Ts'o
2019-03-21 3:59 ` Darrick J. Wong
2019-03-21 10:57 ` Lukas Czerner
2019-03-21 14:32 ` Theodore Ts'o
2019-03-21 2:02 ` [PATCH 6/9] e2scrub_all: add the -n option which shows what e2scrub_all would do Theodore Ts'o
2019-03-21 4:01 ` Darrick J. Wong
2019-03-21 2:02 ` [PATCH 7/9] e2scrub_all: make sure there's enough free space for a snapshot Theodore Ts'o
2019-03-21 4:02 ` Darrick J. Wong
2019-03-21 11:18 ` Lukas Czerner [this message]
2019-03-21 14:26 ` Theodore Ts'o
2019-03-21 2:02 ` [PATCH 8/9] e2scrub_all: refactor device probe loop Theodore Ts'o
2019-03-21 4:05 ` Darrick J. Wong
2019-03-21 10:27 ` Lukas Czerner
2019-03-21 14:31 ` Theodore Ts'o
2019-03-21 15:57 ` Lukas Czerner
2019-03-21 18:24 ` Theodore Ts'o
2019-03-21 20:17 ` Lukas Czerner
2019-03-21 20:48 ` Theodore Ts'o
2019-03-21 21:14 ` Lukas Czerner
2019-03-21 22:04 ` Theodore Ts'o
2019-03-21 22:08 ` Theodore Ts'o
2019-03-22 9:38 ` Lukas Czerner
2019-03-21 20:09 ` Andreas Dilger
2019-03-21 17:48 ` Theodore Ts'o
2019-03-21 19:49 ` Lukas Czerner
2019-03-21 20:23 ` Theodore Ts'o
2019-03-21 16:10 ` Lukas Czerner
2019-03-21 2:02 ` [PATCH 9/9] e2scrub,e2scrub_all: print a (more understandable) error if not run as root Theodore Ts'o
2019-03-21 4:04 ` Darrick J. Wong
2019-03-21 11:36 ` Lukas Czerner
2019-03-21 14:40 ` Theodore Ts'o
2019-03-21 3:55 ` [PATCH 1/9] e2scrub: check to make sure lvm2 is installed Darrick J. Wong
-- strict thread matches above, loose matches on Subject: below --
2019-03-21 20:25 [PATCH -v2 0/9] e2fsprogs: e2scrub cleanups Theodore Ts'o
2019-03-21 20:25 ` [PATCH 7/9] e2scrub_all: make sure there's enough free space for a snapshot Theodore Ts'o
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