[Scst-devel] Honoring SYNC requests in combination with ZFS

[Thijs C. <thi...@gm...>]

Guys,

Is there a definitive answer on whether we can use the fileio handler in
combination with ZFSonLinux?
I'm seeing extreme performance statistics > 18.000 IOPS over iSCSI when
using ZFSonLinx on 4*4TB drives with sync=standard. The disks are exported
over iSCSI through a ZVOL and I've defined a fileio handler in SCST. The
iSCSI volume is exported to an ESXi cluster.

I think this means that SCST doesn't honor the SYNC requests from ESXi.

I know the linux page cache is involved when using the fileio handler, but
i thought sync requests would still be honored? Am i mistaking?

- Thijs