On 29 December 2017 at 19:03, Ian Collins <[email protected]> wrote:
> On 12/30/2017 03:09 PM, Lightspoke Discussion wrote:
>> Hi - I have a compute node with 6 disks - when the head node sets up > the
>> CN, it automatically creates a zpool with 2 striped raidz1 arrays > with 3
>> disks each. I'd like a 3 striped mirrors. Is there a way to > specify - what
>> if someone wanted a raidz2 or 3-way mirror?
> This should be on the SDC list however...
>
> There was some work underway to make this task easier, but I don't know what
> became of it.
>
> If I want a stripe of mirrors, I pull all bar one drive before the install
> and then build the pool around it later.
>
> The last couple of CNs I built had too much memory to allow this with the
> smallish drives they had so I just let the install go through. I then
> snapshotted the pool (modulo dump and swap), sent the snapshot to another
> box, rebuilt the CN zones pool and sent the snapshot back. Inelegant but
> effective!
>
> I don't think I have ever wanted the default layout and do wish it could be
> specified.
I believe a layout (as well as cache and spare options) can be
specified at compute node setup time, by virtue of work done in at
least this change:
https://smartos.org/bugview/HEAD-2326
More detail appears to be available in RFD 53:
https://github.com/joyent/rfd/blob/master/rfd/0053/README.md#changes-to-compute-node-setup
Cheers.
--
Joshua M. Clulow
Engineer @ Joyent
http://blog.sysmgr.org
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