On 27 Jan 2009, at 17:59, Richard Elling wrote:

> ajit jain wrote:
>> Hi Andrew,
>>
>> I am writing a filtering device which tracks the write to the
>> file-system. I am doing it for ufs, vxfs and for zfs. Sometime for
>> consistent point I need to freeze the file-system which flushes dirty
>> block to the disk and block every IO on the top level. So, for ufs  
>> and
>> vxfs I got lockfs and VX_FREEZE/VX_THAW, but with zfs I didn't get  
>> the
>> luck.
>>
>
> I see no need to freeze the file system, or maybe I would say, I see
> no benefit to freezing a file system.  Perhaps your needs will be met
> by the snapshot feature which will also cause a sync(2).

It sounds like the OP could take advantage of the vscan service 
<http://www.opensolaris.org/os/project/vscan/ 
 >

Cheers,

Chris
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