Re: Fresh snapshot

[EricZolf]

Hello again,

and to add to this, if you're really only making a backup of one single huge 
file, you might not need the overhead of rdiff-backup and could live with the 
simpler and slicker rsync.

KR, Eric

On 16 October 2021 07:26:19 UTC, Dominic Raferd <dominic@timedicer.co.uk> wrote:
>You could try using rdiff-backup --no-compression (or 
>--no-compression-regexp). This will make backups bigger but should speed 
>up backups and restores.
>
>The only built-in compression offered by rdiff-backup is gzip, but if 
>you run rdiff-backup --no-compression to a file system using 
>ZFS-with-LZ4-compression it will be much faster than gzip for backup and 
>for restore, and the compression will be almost as good. Patrik has 
>written about this and other benefits of using ZFS, just google 
>'rdiff-backup zfs advantages'.
>
>Do you often need to restore files? Is there some other change you could 
>make that would reduce the need for frequent restores? In my case 
>restores might be slow but they are rare and are lifesavers - so I don't 
>mind waiting...
>
>BTW, make sure you are using latest'n'greatest rdiff-backup (currently: 
>stable 2.0.5)...
>
>On 14/10/2021 00:03, billy noah wrote:
>> Hello,
>>
>> The older snapshots in my backup scheme take very long to restore as they
>> are database dumps over 15GB and stored on a rotational drive (which is
>> more cost effective as a backup volume).  I noticed that this is partially
>> due to the fact the rdiff-backup needs to apply each increment as a patch,
>> stepping backwards until the desired state is achieved.
>>
>> Is there a simple way around this?  I wouldn't mind taking up the space
>> needed for a full snapshot if there is some argument that can accomplish
>> this, but I'm trying to avoid the need to build some complex snapshot
>> directory rotation in to my script logic.  Currently I'm simply doing:
>>
>> mysqldump --single-transaction --lock-tables=false my_database >
>> /mnt/mirror/daily/dump/my_database.sql
>> rdiff-backup  --no-eas --no-acls --no-file-statistics
>> /mnt/mirror/daily/dump/ /mnt/mirror/daily/diff/
>> rm /mnt/mirror/daily/dump/*sql
>> rdiff-backup --force --remove-older-than 10D /mnt/mirror/daily/diff/
>>> /dev/null 2>&1
>> We'd like to keep up to 30 days of increments here but the time needed to
>> restore something that old would be a bit absurd.  I'm thinking something
>> like 4 full backups with 6 increments each.
>>
>> I hope this makes sense.  Thanks!
>