suspend writes for external snapshot

[Eric Anderson]

Kris Kennaway wrote:
> On Wed, Apr 26, 2006 at 04:07:32PM -0500, Robert wrote:
>> Greetings,
>> I am trying to determine if there is a way to suspend write activity on 
>> a FreeBSD filesystem (currently 6.0R) in order to take a snapshot with 
>> external SAN software (Falconstor IPStor)?
> 
> Use a FreeBSD snapshot and then image that?

He can't do it that way because the Falconstor is a raw block device and 
has no idea the difference between a snapshot and other filesystem bits.


Robert - we have some very alpha patches in house that allow suspension 
of UFS filesystems for things like this (also working on online UFS 
growing).  I'm not sure how close we really are to letting it loose in 
the wild, but we will definitely be making all the patches available to 
whomever wants it.


Eric



-- 
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Eric Anderson        Sr. Systems Administrator        Centaur Technology
Anything that works is better than anything that doesn't.
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