Command to take incremental backup using tar

jsaravana87 · 07-11-2012, 05:53 AM

Hi
I tried to take incremental backup using tar command ,But it get fails with following error Cannot stat: No such file or directory.But actually i have file content on following path.Any help regarding incremental backup commands

Quote:

root@dragon:~# cd /var/log/mysql
mysql/ mysql.err mysql.log.1.gz mysql.log.2.gz mysql.log.3.gz mysql.log.4.gz mysql.log.5.gz mysql.log.6.gz mysql.log.7.gz

Quote:

root@dragon:~# tar --create --file=archive1.tar listed-incremental=/var/log/mysql.log.4.gz /backup/
tar: listed-incremental=/var/log/mysql.log.4.gz: Cannot stat: No such file or directory
tar: Removing leading `/' from member names
tar: Exiting with failure status due to previous errors

pixellany · 07-11-2012, 06:31 AM

I am not familiar with "listed incremental", but a quick glance at the man page says you do not want that "=". As you can see from the error message, tar is seeing this whole string as the filename:

Quote:

listed-incremental=/var/log/mysql.log.4.gz

Also, "--" is required in front of "listed-incremental"

LittleMaster · 07-11-2012, 06:35 AM

Hi

Try out these commands

tar -cvf backup1.tar --listed-incremental=/var/log/usr.snar /home

pixellany · 07-11-2012, 06:39 AM

As I stated, the man page does not specify the "=". Are you saying that it actually works that way? (Same issue for --file)

jsaravana87 · 07-11-2012, 08:13 AM

Finally tried out incremental backup using rsync

rsync -vazi --rsh="sshpass -p password ssh -l root" 10.200.2.36:/backup /backup

receiving incremental file list
cd+++++++++ backup/
>f+++++++++ backup/1
>f+++++++++ backup/2
>f+++++++++ backup/3
>f+++++++++ backup/4
>f+++++++++ backup/5
>f+++++++++ backup/6
>f+++++++++ backup/7
>f+++++++++ backup/8
>f+++++++++ backup/9
>f+++++++++ backup/a
>f+++++++++ backup/b
>f+++++++++ backup/c
>f+++++++++ backup/d
>f+++++++++ backup/e
>f+++++++++ backup/f
>f+++++++++ backup/g
>f+++++++++ backup/h
>f+++++++++ backup/i
>f+++++++++ backup/incremental

sent 775 bytes received 1949 bytes 1816.00 bytes/sec
total size is 15 speedup is 0.01

jschiwal · 07-11-2012, 08:45 AM

Actually, the info manual does use --listed-incremental=<snar file>

Code:

`--listed-incremental=FILE'
`-g FILE'
     Handle incremental backups with snapshot data in FILE.

   To create an incremental backup, you would use
`--listed-incremental' together with `--create' (*note create::).  For
example:

     $ tar --create \
                --file=archive.1.tar \
                --listed-incremental=/var/log/usr.snar \
                /usr

So does the man page.

Code:

       -g, --listed-incremental=FILE
              handle new GNU-format incremental backup

Look at section 5.2 of the info manual.

pixellany · 07-11-2012, 10:14 AM

Code:

[mherring@herring_desk ~]$ man tar|grep -u listed-incremental
     -g, --listed-incremental FILE
           dump level for created listed-incremental archive

OK, so it works with the "=" also

I think the issue was omitting the "--"