[TriLUG] Anyone here know much about kernel programming?

[Ron Kelley]

Does DRBD do what you are looking for?



Thanks,

-----------------------------
Ron Kelley
rkelleyrtp at gmail.com



On Jul 11, 2011, at 1:50 PM, Paul Bennett wrote:

> Just had a thought about backups...
> 
> On Windows, you can get a number of products that sit between the filesystem driver and the block device driver. While a backup is occurring, this extra driver caches writes to the disk, and presents them back as successful (and returns the "written" data to the filesystem driver if a read is requested). Once a block is backed up, any writes for that block are flushed to the block device, and freed from the cache.
> 
> The net result? Invisible, consistent backups on a live running system.
> 
> I wonder whether Linux has something that can do that, instead of having to script up "take snapshot, backup snapshot, blow snapshot away" stuff?
> 
> If not, I hereby suggest that someone should make one. It'd have to be something in the kernel, probably fairly deeply in the kernel.
> 
> Anyone here got enough experience on kernel programming to help me learn how to make an equivalent dealie in the Linux kernel?
> 
> 
> Thanks,
> 
> 
> --
> Paul
> -- 
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