From: Lukas Wagner <l.wagner@proxmox.com>
To: pbs-devel@lists.proxmox.com
Subject: [pbs-devel] [PATCH-SERIES proxmox-backup/pxar] fix #3828: proxmox_backup_debug: Introduce `diff archive` subcommand
Date: Thu, 27 Oct 2022 14:28:04 +0200 [thread overview]
Message-ID: <20221027122806.79851-1-l.wagner@proxmox.com> (raw)
This patch series adds the "diff archive" subcommand to proxmox-backup-debug.
It allows to compare pxar archives in two different snapshots, producing
a list of added/modified/deleted directory entries. For example:
$ proxmox-backup-debug diff archive <snapshot-a> <snapshot-b> root.pxar
M d etc
M f etc/hosts
D l etc/localtime
M d tmp
A f tmp/newfile
The first row indicates addded/modified/deleted, the second the type of
directory entry (file, directory, link, FIFO, etc.).
The new command accepts the --ns/--keyfile/--keyfd/--repository options in the
same manner as proxmox-backup-client.
A few words about the new command's performance: For large folder structures
with loads of small files, for example a full container backup, the
tool is pretty slow. This is due to fact that we need to skim through
*a lot* of metadata to distinguish *modified*
files from *potentially modified* files - the latter being files which
happen to be stored in the same chunk as a modified file.
However, in terms of usability it still beats manually restoring two
snapshots and using some directory diff tool on the restored directories.
Compatibility notes: The pxar patch is required to compile the second patch.
Both patches should not affect any other users/system parts.
pxar:
Lukas Wagner (1):
derive PartialEq trait for Metadata and related structs
src/format/acl.rs | 4 ++--
src/format/mod.rs | 8 ++++----
src/lib.rs | 8 ++++----
3 files changed, 10 insertions(+), 10 deletions(-)
proxmox-backup:
Lukas Wagner (1):
fix #3828: proxmox_backup_debug: Introduce `diff archive` subcommand.
docs/proxmox-backup-debug/description.rst | 3 +
src/bin/proxmox-backup-debug.rs | 3 +-
src/bin/proxmox_backup_debug/diff.rs | 456 ++++++++++++++++++++++
src/bin/proxmox_backup_debug/mod.rs | 1 +
4 files changed, 462 insertions(+), 1 deletion(-)
create mode 100644 src/bin/proxmox_backup_debug/diff.rs
--
2.30.2
next reply other threads:[~2022-10-27 12:28 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-27 12:28 Lukas Wagner [this message]
2022-10-27 12:28 ` [pbs-devel] [PATCH pxar 1/1] derive PartialEq trait for Metadata and related structs Lukas Wagner
2022-10-27 13:38 ` [pbs-devel] applied: " Wolfgang Bumiller
2022-10-27 12:28 ` [pbs-devel] [PATCH proxmox-backup 1/1] fix #3828: proxmox_backup_debug: Introduce `diff archive` subcommand Lukas Wagner
2022-10-27 13:39 ` Wolfgang Bumiller
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