[kwlug-disc] Was cronjob / btrfs scrup [Was: Re: What is all this about systemd?]

[B.S.]

Speaking of, and given the coming presentation topic ...

I've recently started wondering about how to back up a vm, live. i.e. 
Assuming one leaves a vm up 24/7, and wanting an instant restore (vs 
backing up the vm from within the vm, be it rsync and/or mondoarchive). 
In essence, if the machine or disk goes down, light up the backup copy 
of the vm and get on with figuring out what happened to the original.

If the 'backup' lands on an external (eSata) disk, then presumably I 
just move the disk to another machine upon original machine failure and 
turn on the vm there.

 From my initial poking, vbox can't do this [but can if the vm is taken 
down first]. Seems that an extra-vm facility is needed, such as a btrfs 
or lvm snapshot.

'course ... that assumes the vm is currently stored on an lvm or btrfs fs.

So, guess I have to reformat a partition (and find somewhere to tuck the 
stuff away for a moment), then go and figure out some snapshot automation.

Am I thinking correctly on this?


On 14-10-28 12:01 PM, Khalid Baheyeldin wrote:
> I do my laptop backup using cron without systemd.
>
> I have an rsync job that runs a script twice every hour between 8 am
> and 11 pm. It just does rsync to the server which gets backed up
> daily.
> Inside the script, there is a timestamp file containing the date this
> is completed.
>
> Subsequent invocations of the script do not do a backup if they find
> the timestamp file.
>
> So no matter what time I power on the laptop, it gets backed up at
> least once a day.
>
> Works regardless of the specific desktop I am using, or lackthereof.
> If I switch from KDE to xubuntu, this will continue to work.
>
> On Tue, Oct 28, 2014 at 10:36 AM, Chris Irwin <chris at chrisirwin.ca> wrote:
>> This is great!
>>
>> I set up a cronjob to perform a btrfs scrub, snapshot, and ship the backup
>> to my NAS. However, I need to either remember to leave it running overnight
>> on Saturday (which is less than ideal), or  schedule it more often than I'd
>> prefer to ensure I get at least one backup throughout the week.
>>
>> I already had the AC and network checks done. This seems to be the missing
>> link I didn't know I was looking for.
>>
>>
>> On Mon, Oct 27, 2014 at 11:21 PM, Paul Nijjar <paul_nijjar at yahoo.ca> wrote:
>>>
>>>
>>>
>>> --
>>>
>>> Here is a more positive experience of systemd, by somebody whose
>>> opinion I trust a lot:
>>>
>>> http://joeyh.name/blog/entry/a_programmable_alarm_clock_using_systemd/
>>>
>>> --
>>> http://pnijjar.freeshell.org
>>>
>>>
>>> _______________________________________________
>>> kwlug-disc mailing list
>>> kwlug-disc at kwlug.org
>>> http://kwlug.org/mailman/listinfo/kwlug-disc_kwlug.org
>>
>>
>>
>>
>> --
>> Chris Irwin
>> <chris at chrisirwin.ca>
>>
>> _______________________________________________
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>>
>
>
>