zfs receive and SLOG

[efinley1272]

Two questions -
1) Does 'zfs receive' utilize the ZIL and therefor a SLOG if you have one?

2) I have several 16 drive (3.5") chassis that I've inherited that I'll be using for backups for VM hosts. I'll be using zfs send/rec to get the data there. Would I be better off having two 8 drive raidz2 vdevs or one 10 drive raidz2 and one 6 drive raidz2 - the second configuration following the 2^n+p rule?

Thanks in advance,
Elliot

 

[Ericloewe]

No, zfs recv uses async writes since it's supposed to be a quasi-atomic process (a snapshot either exists and is valid or doesn't exist).

Would I be better off having two 8 drive raidz2 vdevs or one 10 drive raidz2 and one 6 drive raidz2

Symmetry is good for OCD. Strict rules for vdev sizing are mostly bogus. So I'd say 2x 8.

 

[Stux]

Firehose of sequential writes :)

RaidZ2 yums it up.

 

[efinley1272]

Thanks for the quick answer.