Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.c > #148025

Re: Somewhat OT: data backup strategies, and did anyone write their own backup tool in C

Show all headers | View raw

DFS wrote:
> My backup drive is external, so each night or two I plug it in and run 
> some custom python code to sync local to backup.
> 
> The method is a little odd, maybe.  I copy into a SQLite table all the 
> directories, filenames and modified dates on the local and backup 
> drives, then use outer join queries to see what's out of sync.  Then 
> copy from local to backup all new or changed files.  Then delete from 
> the backup what's not in local.  When done they're pretty much mirror 
> images.
> 
> It works fine, but loading the filenames into SQLite is slow.  I don't 
> run it for the entire drive - just the directories I altered since the 
> last backup.  Which I have to remember, or go hunting thru.  So it's not 
> very efficient.
> 
> Rather than using the database, I probably should just go directory by 
> directory, file by file.  I'm thinking of doing it in C (for practice, 
> using dirent() or command()).
> 
> How do you guys backup your systems?  rsync?
> 
> Anyone write their own C code to do it?
> 

Your message header, User Agent says:

    Mozilla/5.0 (Windows NT 6.3; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.9.1

Are you looking for a solution for your posting machine,
or for some other machine ?

You should state, at a minimum, what your distro is, and
what your file system choice is (in case there is something
magical about the file system).

Commercial incremental backup software, avoids getting
your hands dirty.

    Paul

Back to comp.lang.c | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

Somewhat OT: data backup strategies, and did anyone write their own backup tool in C DFS <nospam@dfs.com> - 2019-11-14 17:45 -0500
  Re: Somewhat OT: data backup strategies, and did anyone write their own backup tool in C Ian Collins <ian-news@hotmail.com> - 2019-11-15 11:58 +1300
    Re: Somewhat OT: data backup strategies, and did anyone write their own backup tool in C chad <cdalten@gmail.com> - 2019-11-14 18:01 -0800
    Re: Somewhat OT: data backup strategies, and did anyone write their own backup tool in C Jorgen Grahn <grahn+nntp@snipabacken.se> - 2019-11-15 09:50 +0000
  Re: Somewhat OT: data backup strategies, and did anyone write their own backup tool in C Jorgen Grahn <grahn+nntp@snipabacken.se> - 2019-11-15 09:47 +0000
  Re: Somewhat OT: data backup strategies, and did anyone write their own backup tool in C Paul <nospam@needed.invalid> - 2019-11-15 06:23 -0500

csiph-web