[zfs-discuss] BP rewrite? (Was Re: spreading data after adding devices to pool)

2010-07-09 Thread Roy Sigurd Karlsbakk
Anyone knows where in the pipeline BP rewrite is, or how long this pipeline is? 




You could move the data elsewhere using zfs send and recv, destroy the original 
datasets and then recreate them. This would stripe the data across the vdevs. 
Of course, when BP-rewrite becomes available it should be possible to simply 
redistribute blocks amongst the various vdevs without having to go through 
destroying/creating. 


On Fri, Jul 9, 2010 at 6:57 AM, George Helyar  ghel...@gmail.com  wrote: 


I use ZFS (on FreeBSD) for my home NAS. I started on 4 drives then added 4 and 
have now added another 4, bringing the total up to 12 drives on 3 raidzs in 1 
pool. 

I was just wondering if there was any advantage or disadvantage to spreading 
the data across the 3 raidz, as two are currently full and one is completely 
empty. 

If it would improve performance to spread the data, is there any easy way to do 
it? 
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Re: [zfs-discuss] BP rewrite? (Was Re: spreading data after adding devices to pool)

2010-07-09 Thread Lasse Osterild
+1

I badly need this.

On 09/07/2010, at 19.40, Roy Sigurd Karlsbakk wrote:

 Anyone knows where in the pipeline BP rewrite is, or how long this pipeline 
 is?
 
 You could move the data elsewhere using zfs send and recv, destroy the 
 original datasets and then recreate them.  This would stripe the data across 
 the vdevs.  Of course, when BP-rewrite becomes available it should be 
 possible to simply redistribute blocks amongst the various vdevs without 
 having to go through destroying/creating.
 
 
 
 
 -- 
 Vennlige hilsener / Best regards
 
 roy
 --
 Roy Sigurd Karlsbakk
 (+47) 97542685
 r...@karlsbakk.net
 http://blogg.karlsbakk.net/

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