Am 08.07.2012 09:27, schrieb Steve Litt:
On Sat, 07 Jul 2012 11:36:02 +0200, Reindl Harald said:
to believe under really high load a local storage is faster at the end is bullshit!
Can one even argue on one side or the other without knowing the speed of the network, and how much contention is on that network?
the SAN has normally it's own network
My experience is that with a 100Mbs network, local is faster, although I've never had a SAN, so to speak, on the other end.
nobody is using 100 MBit for a SAN
The specification of a SATA rev 3 is 6Gbs, which is a heck of a lot faster than 1Gbs per second spec of a gigabit network. Both have a lot of things slowing them from their spec, but I'd need to see some proof of an assertion that anything coming in over a 1Gbs wire can beat a SATA rev3 local disk.
there is more than the connection speed
6Gbsdo not help you much as long the physical disk can not write in this speed and more concurretn writes making this worser - so there are many things like big battery backed caches fon a SAN which are imprtant for OVERALL performance