From: Stefan Reiter <s.reiter@proxmox.com>
To: Dietmar Maurer <dietmar@proxmox.com>,
Proxmox Backup Server development discussion
<pbs-devel@lists.proxmox.com>
Subject: Re: [pbs-devel] [PATCH proxmox-backup 2/7] backup: only allow finished backups as base snapshot
Date: Thu, 6 Aug 2020 09:58:18 +0200 [thread overview]
Message-ID: <356ae075-5769-887b-4356-6906589a8901@proxmox.com> (raw)
In-Reply-To: <1066958979.400.1596689116942@webmail.proxmox.com>
On 8/6/20 6:45 AM, Dietmar Maurer wrote:
> This break the assumption that the current backup only reference junks from
> the previous one.
>
Why do we need that assumption?
> Instead, we can simply fail if the previous backup is not complete yet?
>
"Not complete *yet*" can't happen, since only one backup can run at a
time. So if this case occurs, it's because the server has broken backups.
>> On 08/04/2020 12:42 PM Stefan Reiter <s.reiter@proxmox.com> wrote:
>>
>>
>> If the datastore holds broken backups for some reason, do not attempt to
>> base following snapshots on those. This would lead to an error on
>> /previous, leaving the client no choice but to upload all chunks, even
>> though there might be potential for incremental savings.
>>
>> Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
>> ---
>> src/api2/backup.rs | 2 +-
>> src/backup/backup_info.rs | 8 ++++++--
>> 2 files changed, 7 insertions(+), 3 deletions(-)
>>
>> diff --git a/src/api2/backup.rs b/src/api2/backup.rs
>> index ad13faa5..aafea8fa 100644
>> --- a/src/api2/backup.rs
>> +++ b/src/api2/backup.rs
>> @@ -97,7 +97,7 @@ async move {
>> bail!("backup owner check failed ({} != {})", username, owner);
>> }
>>
>> - let last_backup = BackupInfo::last_backup(&datastore.base_path(), &backup_group).unwrap_or(None);
>> + let last_backup = BackupInfo::last_backup(&datastore.base_path(), &backup_group, true).unwrap_or(None);
>> let backup_dir = BackupDir::new_with_group(backup_group.clone(), backup_time);
>>
>> if let Some(last) = &last_backup {
>> diff --git a/src/backup/backup_info.rs b/src/backup/backup_info.rs
>> index 37dc7aa1..ea917d3c 100644
>> --- a/src/backup/backup_info.rs
>> +++ b/src/backup/backup_info.rs
>> @@ -313,9 +313,13 @@ impl BackupInfo {
>> }
>>
>> /// Finds the latest backup inside a backup group
>> - pub fn last_backup(base_path: &Path, group: &BackupGroup) -> Result<Option<BackupInfo>, Error> {
>> + pub fn last_backup(base_path: &Path, group: &BackupGroup, only_finished: bool)
>> + -> Result<Option<BackupInfo>, Error>
>> + {
>> let backups = group.list_backups(base_path)?;
>> - Ok(backups.into_iter().max_by_key(|item| item.backup_dir.backup_time()))
>> + Ok(backups.into_iter()
>> + .filter(|item| !only_finished || item.is_finished())
>> + .max_by_key(|item| item.backup_dir.backup_time()))
>> }
>>
>> pub fn sort_list(list: &mut Vec<BackupInfo>, ascendending: bool) {
>> --
>> 2.20.1
>>
>>
>>
>> _______________________________________________
>> pbs-devel mailing list
>> pbs-devel@lists.proxmox.com
>> https://lists.proxmox.com/cgi-bin/mailman/listinfo/pbs-devel
next prev parent reply other threads:[~2020-08-06 7:58 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-04 10:41 [pbs-devel] [PATCH 0/7] More flocking and race elimination Stefan Reiter
2020-08-04 10:41 ` [pbs-devel] [PATCH proxmox-backup 1/7] finish_backup: mark backup as finished only after checks have passed Stefan Reiter
2020-08-06 4:39 ` [pbs-devel] applied: " Dietmar Maurer
2020-08-04 10:42 ` [pbs-devel] [PATCH proxmox-backup 2/7] backup: only allow finished backups as base snapshot Stefan Reiter
2020-08-06 4:45 ` Dietmar Maurer
2020-08-06 7:58 ` Stefan Reiter [this message]
2020-08-07 5:40 ` [pbs-devel] applied: " Dietmar Maurer
2020-08-04 10:42 ` [pbs-devel] [PATCH proxmox-backup 3/7] datastore: prevent in-use deletion with locks instead of heuristic Stefan Reiter
2020-08-06 4:51 ` Dietmar Maurer
2020-08-04 10:42 ` [pbs-devel] [PATCH proxmox-backup 4/7] prune: also check backup snapshot locks Stefan Reiter
2020-08-05 7:23 ` Fabian Ebner
2020-08-05 8:34 ` Stefan Reiter
2020-08-04 10:42 ` [pbs-devel] [PATCH proxmox-backup 5/7] backup: flock snapshot on backup start Stefan Reiter
2020-08-04 10:42 ` [pbs-devel] [PATCH proxmox-backup 6/7] Revert "backup: ensure base snapshots are still available after backup" Stefan Reiter
2020-08-04 10:42 ` [pbs-devel] [PATCH proxmox-backup 7/7] backup: lock base snapshot and ensure existance on finish Stefan Reiter
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