[NTLUG:Discuss] Copying a file to TWO destinations as the same time..

[Richard Geoffrion]

Chris Cox wrote:

> <lots and lots of snipping...so we don't waste valuable disk space>
>
>Am I understanding that both drives are local and are direct
>attached?
>  
>
Yes.  Both drives are hot-pull SATA drives...and are local.  One drive 
gets 'replaced' by its replacment every week.

>How much data are you backing up?
>  
>
ah....now that depends on the day.  Seeing as how it is a 
dirvish-rsync... we are backing up hundreds of megs and making a 
gaboodle of hard links. ( one gaboodle = 1024 gobs * 1024)

>What is your sustained drive writing speed going from the
>"inhouse drive" to the "offsite drive".  Are you getting
>75M/sec or higher?
>  
>
clarification point.    the 'inhouse drive' AND ' offsite drive' are 
both DESTINATION drives with the rsync of MULTIPLE SOURCES/MULTIPLE 
SERVERS occuring over a gigabit backbone.

>There's always md (RAID1) or drdb (remote block device) to consider.
>  
>
I don't see what the Digital Radio Development Bureau has to do with 
this?  :)

Seriously though.  I'm not doing a block copy between the 'inhouse drive 
destination' and the '"outhouse" drive destination'.  The two drives are 
not necessarily a duplicate of each other as each of these destination 
devices are the recipients of an rsync from the aforementioned 'multiple 
sources over gigabit.'

>Might be quicker to just do a recursive copy to the offsite
>drive... rsync might be ok... but I'm totally sure about
>the content of the "offsite drive" at the time of
>backup.
>
>  
>
the previous statement is not applicable due to the prior lack of 
information given.

>I don't know if it's worth considering the original question
>without knowing more detail... just my opinion of course.
>
>  
>

David's suggestion to "modify the source code to rsync to connect to two different places at once, ..[and] make two different compare tables to tell what to transfer to each [destination device]." is in fact the proposed solution.

How do you guys suggest I go about getting that done/sponsored/whatever?  That would be a great contribution to well....at least the dirvish project.


-- 
Richard
"I WILL start going to bed earlier..."