Hi Adi,
You've got me very interested in ATA-over-ethernet. Reading around
online, it seems very simple! I have a couple of questions if you don't
mind:
1) Can I export LVM volumes as block devices using ATAoE? Then, the
"clients" (Xen nodes) can do their own LVM stuff with the exported
"device"..
2) How would I use 802.3ad "link agregation" with ATAoE?
Thanks
Hi!
> Can you suggest a way I could benchmark all
these things? I've never
> benchmarked Hard Drives before..
As
mentioned in my previous mail -- use (for example) fio to do
benchmarks.
Before you start with benchmarking I suggest to read the
following slides:
http://www.pgcon.org/2009/schedule/attachments/123_pg-benchmarking-2.pdf
There
are many very clever hints in this document. Getting benchmarking
right is
very hard and giving general statements about performance is
(close to)
impossible... ;-)
Just one more thing: You cannot compare local benchmarks to
benchmarks of
iSCSI/AoE targets. Devices connected to your local bus have a
way lower
latency! This results in lower throughput mainly. RAID0 on local
disks
gives way higher throughput in terms of MBps than network storage.
Therefor
"IOPS" were invented... ;-)
Feel free to ask, if you need
more specific hints on how to conduct
benchmarks... I have recently done some
work in this area.
-- Adi