[zfs-discuss] Speeding up resilver on x4500

[Stuart Anderson]

On Jun 21, 2009, at 10:21 PM, Nicholas Lee wrote:

>
>
> On Mon, Jun 22, 2009 at 4:24 PM, Stuart Anderson <anderson at ligo.caltech.edu 
> > wrote:
>
> However, it is a bit disconcerting to have to run with reduced data
> protection for an entire week. While I am certainly not going back to
> UFS, it seems like it should be at least theoretically possible to  
> do this
> several orders of magnitude faster, e.g., what if every block on the
> replacement disk had its RAIDZ2 data recomputed from the degraded
>
> Maybe this is also saying - that for large disk sets a single RAIDZ2  
> provides a false sense of security.

This configuration is with 3 large RAIDZ2 devices but I have more  
recently
been building thumper/thor systems with a larger number of smaller  
RAIDZ2's.

Thanks.

--
Stuart Anderson  anderson at ligo.caltech.edu
http://www.ligo.caltech.edu/~anderson