[NBLUG/talk] Synchronizing strategies

[Ed Rogers]

http://www.linuxjournal.com/article/8758

Quoting "Omar Eljumaily" <omar at omnicode.com>:

> I think it would be cheaper to just get directory/file mod listings,  
> which I'm already paranoid would create undo overhead.  I know that  
> Samba plugins can tell you when files have been modified without  
> searching.  I'm wondering if there's such a thing for Linux file  
> systems.
>
> Thanks,
>
> Omar
>
>
> On 11/22/2014 11:14 AM, Zack Gold wrote:
>>
>> You could write a clever script that stores md5sums of every file  
>> and check I'd it's changed.
>>
>> On Nov 22, 2014 2:13 PM, "Omar Eljumaily" <omar at omnicode.com  
>> <mailto:omar at omnicode.com>> wrote:
>>
>>    I'd like to have the knowledge of when a file changes.  I don't
>>    know how to get those notifications in linux.  Does anybody know?
>>
>>    Also, not all files get closed to the point where they can be
>>    copied every time they're modified.  Windows clients are notorious
>>    for keeping files open all day long without letting other
>>    processes copy them.
>>
>>    The thing with the could side is that I don't want to be the
>>    person responsible for running the cloud server, so I'm going to
>>    have to work within the cloud provider's framework.  The ones I'm
>>    looking at right now are Google and 1and1.com <http://1and1.com>
>>    (which seems to be pretty cheap, about $10/month for 1 terrabyte).
>>
>>    Thanks,
>>
>>    Omar
>>
>>
>>    On 11/22/2014 10:57 AM, Jordan Erickson wrote:
>>
>>        I use rsync+ssh+rsnapshot+cron for a (albeit daily) backup of
>>        multiple
>>        VMs in "the cloud" (my cloud) totaling about 1.5TB total to a
>>        local
>>        disk, then another rsnapshot to an external disk about every
>>        month. It's
>>        fast. rsync is designed to take large amounts of data and sync
>>        them
>>        efficiently.
>>
>>        Is there a requirement for "every hour" (and not something
>>        more frequent
>>        like, every time a file changes)? If not, maybe a trigger that
>>        whenever
>>        a file changes, it's sync'd... I'm sure multiple avenues are
>>        possible
>>        with some simple script-fu (and probably plenty of ready-to-go
>>        packages
>>        as well).
>>
>>
>>        Jordan Erickson (PGP: 0x78DD41CB)
>>        LNS: 707-636-5678 <tel:707-636-5678>, http://logicalnetworking.net
>>
>>
>>        On 11/22/2014 10:50 AM, steve wrote:
>>
>>            On 11/22/2014 10:43 AM, Zack Gold wrote:
>>
>>                rsync + cron?
>>
>>                On Nov 22, 2014 1:36 PM, "Omar Eljumaily"
>>                <omar at omnicode.com <mailto:omar at omnicode.com>
>>                <mailto:omar at omnicode.com <mailto:omar at omnicode.com>>>
>>                wrote:
>>
>>                     Does anybody know about file synchronization
>>                strategies, mainly for
>>                     synching from a local file server to a cloud?    
>>               What I'm trying to
>>                     accomplish is:
>>
>>            For a terebyte???
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>



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