[OpenIndiana-discuss] ZFS pool layout - request for opinion

[Reginald Beardsley]

I suggest you partition the disks with a small (10-20 GB?) partition (slice to some) for rpool and the rest of the disk in another partition.  Mirror the rpools and build a RAIDZ2 on the big partition.  You'll get  more usable space and two disk failure tolerance.  

If you *really* want to be efficient with 6 disks, use  a three way rpool mirror and make a RAIDZ1 for log files using the other 3 partitions.  Single disk failure tolerance on everything and two disk tolerance on the critical bits.

It may not be "bootable RAIDZ" but it's close enough in my book.  It gets the job done w/ minimum effort and good failure tolerance for the cost.  True bootable RAIDZ would not look much different from an operations perspective.  In fact, it might be more complicated.  The really nice thing about partitioning the disk like this is how simple it is to set up.



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On Wed, 2/26/14, Stefan Müller-Wilken <stefan.mueller-wilken at acando.de> wrote:

 Subject: [OpenIndiana-discuss] ZFS pool layout - request for opinion
 To: "openindiana-discuss at openindiana.org" <openindiana-discuss at openindiana.org>
 Date: Wednesday, February 26, 2014, 2:06 AM
 
 Dear all,
 
 one thing I stumble over again and again is ZFS pool layout
 for 6 disk servers (e.g. 1 HU ProLiants) . What I do so far
 is reserving disk 1 & 2 for the rpool mirror and put
 disks 3 - 6 into a RAIDZ-1 data pool. I don't really like
 this layout as it means wasting a lot of space on the rpool
 while having only minimal redundancy for data. What do
 others do to combine space efficiency with bootability and
 redundancy?
 
 Cheers
  Stefan
 
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