Hi,
I have a couple of FreeBSD 10 systems I've setup HAST on - this seems to work well, but I've noticed the read performance of local /dev/hast/* devices is around half of the normal raw device?
e.g. a dd from an SSD as /dev/da0 nets around 220Mbyte/sec - the same dd run against the same device when setup with hast (i.e. /dev/hast/disk1) only nets around 110Mbyte/sec.
I realise another layer is going to affect performance (and this may just be the price you have to pay) but is there anything likely tunable for this?
If I fail the other node (so I'm running the test against a 'degraded primary') it's still as slow [as you'd kind of expect, as reads were/are only local]
I've setup ZFS on top of the hast devices - again this seems to work OK, but you can really see the performance difference when doing a pool scrub on hast backed devices vs. the raw ones...
-Karl _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-geom To unsubscribe, send any mail to "[email protected]"
