> Am 04.02.2017 um 10:48 schrieb Florian Ermisch > <[email protected]>: > > Hi Rainer, > > isn't Amazon AWS xen-based? > I know Colin Percival (cperciva@) is running > tarsnap.com on AWS, maybe he knows how > to tune it properly?
It’s not a question of tuning. It’s a factor of 5 that FreeBSD is slower. On SSDs, it’s 10 to 15x. > Looks like he's the one providing FreeBSD > images for AWS, too: https://aws.amazon.com/marketplace/pp/B01LWSWRED/ > Amazon is probably running a heavily patched > version of Xen but looking at the images' > sysctls & stuff and running one on your Xen- > Server might provide some insights - or at > least datapoints. > > And then there's DTrace to dive into the > kernel's inner workings*… > Yes, but I don’t even know there to start. My knowledge of Dtrace is very, very limited. > Oh, does Xen still provide emulation for other > storage controllers like SATA or SAS? If so > you may get an at least bearable performance > using those. FreeBSD 10 and 11 contain the „optimal“ support for Xen DomU support out-of-the box, AFAIK (the documentation / wiki for Xen is in a horrible state IMO). _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[email protected]"
