> When tuning recordsize for things like databases, we
> try to recommend
> that the customer's recordsize match the I/O size of
> the database
> record.

On this filesystem I have:
 - file links and they are rather static
 - small files ( about 8kB ) that keeps changing
 - big files ( 1MB - 20 MB ) used as temporary files( create, write, read, 
unlink ) 
 and operations on theses files is about 50% off all I/O

I think I need defragmentator tool. Do you think there will be any ?

Now all I can do is copy filesystems from this zpool to another. 
After this operation new zpool will not be fragmentated. 
But it takes time and I have several zpool's like this.
 
 
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