[zfs-discuss] How to set ZFS metadata copies=3?

2008-02-15 Thread Vincent Fox
Let's say you are paranoid and have built a pool with 40+ disks in a Thumper.

Is there a way to set metadata copies=3 manually?

After having built RAIDZ2 sets with 7-9 disks and then pooled these together, 
it just seems like a little bit of extra insurance to increase metadata copies. 
 I don't see a need for extra data copies which is currently the only trigger I 
see for that.
 
 
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Re: [zfs-discuss] How to set ZFS metadata copies=3?

2008-02-15 Thread George Wilson
Vincent Fox wrote:
 Let's say you are paranoid and have built a pool with 40+ disks in a Thumper.

 Is there a way to set metadata copies=3 manually?

 After having built RAIDZ2 sets with 7-9 disks and then pooled these together, 
 it just seems like a little bit of extra insurance to increase metadata 
 copies.  I don't see a need for extra data copies which is currently the only 
 trigger I see for that.
  
  
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ZFS already does something like this for metadata by setting either 2 or 
3 copies based on the metadata type. Take a look at 
dmu_get_replication_level().

- George
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