Re: reiser4 plugins

[David Masover <ninja@slaphack.com>]

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Jesper Krogh wrote:
> ["Followup-To:" header set to gmane.linux.kernel.]
> I gmane.linux.kernel, skrev David Masover:
> 
>>>Most desktop users today don't have backups because there is no credible
>>>backup technology for 500Gb of data. They may have partial backups. Some
>>
>> Bandwidth is getting faster.  And I just found a nice site for backups
>> called streamload.com.  They don't seem to support rsync, and allow only
>> 100 meg downloads, but unlimited uploads.
>>
>> Few desktop users today really need to backup more than 50 megs of data.
> 
> 
> That gives tedious manual work.. and btw, won't save you if you from
> loosing stuff from when the backup was made until now. 

Manual?

Try scripting.  For me, that's a tar command involving /home, /etc, and
about one or two other files, with a few excludes, like /home/shared/video.

>>>things the fs can't deal with - if the disk goes boom then thats a lower
>>>level concern. Also certain bits like writing to spare blocks on a
>>>problem write are indeed handled drive level nowdays.
>>
>> Right.  And putting them in the FS is unneccesary bloat if you've got
>> another mechanism for dealing with it.  Anyone with 500 gigs of data can
>> afford to do a little RAID, or at least some burned DVDs.
>>
>> DVDs are cheap nowdays:
>> http://www.newegg.com/Product/Product.asp?Item=N82E16817502002
> 
> 
> Again lots of manual work.. I actually have a DAT-station.. but I'm not
> getting it used. People have DVD-burners, but many don't get time to do
> a backup anyway. A Copy-On-Write feature in the filesystem would save
> the average dataloss situation todag (for home users). Where they
> accidentally deletes stuff. 

A lot of the people I know keep stuff on their DVDs, like movies and
music, so they can carry them around.  And the rest of it is the 50 megs.

>> Streamload.
> 
> 
> Why, when it could be quick and transparent. And Linux is used many
> places where you cant let data out-of-the-house of where bandwidth
> "sucks". The waste-space in my diskdrives increases everyday .. and i
> fill up with a tar-ball of the system every now-and-then, but it would
> definately be better suited and more effecient (save me more times) done
> directly in the filesystem. 

Streamload is quick and transparent for me.  I put files on the
fileserver, it tars them up and uploads them via Streamload's perl client.

>> I agree it's nice to have a more corruption-proof filesystem.
>> Convenient.  But not absolutely necessary.
> 
> 
> Thats called raid, we have that allready. But raid won't help for and: 
> rm /etc/passwd, a Copy-On-Write filesystem (not-snapshot) would. Used on
> a mirrored raiddisk, with enough space on the disk, it would actually
> guard you from allmost anything but getting the computer stolen. 
> 
> Totally unrelated to reiser4 but a feature that would be nice to have in
> "any" filesystem. 

Not totally unrelated.  COW has been discussed.  I don't remember if the
low-level stuff was done, but the main complaint was a lack of a copy
system call.

And RAID is an argument for Reiser4's attitude that it's not the job of
the FS to be corruption-proof.

Still, it's far easier to avoid deleting stuff than to avoid disk
failure.  First priority is to get the stuff OFF the machine.

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