Christopher George wrote: > The backup/restore feature allows many interesting end-user scenarios, a ZIL > is > not one of them. A ZIL requires a properly sized UPS (dedicated is > preferred). The DDRdrive X1 uses 5W when the host loses power, intentionally > or not, and a UPS is easily chosen to cover a worst case power recovery time.
You actually mean SLOG (ie Separate Log Device) not ZIL. The ZIL always exists and is per ZFS dataset. In the general case a ZFS SLOG doesn't require a UPS at all it requires a device that is faster than you main pool disks and one that is persistent when the operating system stops without warning for example on a panic or on power loss without a system UPS. The DDRdrive X1 when used as a SLOG for ZFS may well require a UPS. -- Darren J Moffat
