Dear Harsh, Thanks for your reply and suggestion. I will read your recommendation carefully. If I find something important, I will left my answer to this thread too, since I think EC2 is quite important in parallel processing.
Thanks On Thu, Nov 24, 2011 at 6:31 PM, Harsh J <ha...@cloudera.com> wrote: > Jiamin, > > Does AMZN not carry a forum of their own for these questions? They'd > be the best to ask really. > > I do not know what an "EC2 Compute Unit" means, but the page clearly > says two virtual cores. Perhaps this may help understand: > > http://gevaperry.typepad.com/main/2009/03/figuring-out-the-roi-of-infrastructureasaservice.html > > On Thu, Nov 24, 2011 at 9:10 PM, Jiamin Lu <jiamin....@googlemail.com> > wrote: > > Hi, all > > > > I am using the Amazon EC2, with their large instances. > > Amazon claims these large type instances have 4 EC2 Compute units (2 > virtual > > cores with 2 EC2 Compute Units each). > > But according to my observation, it seems like they only have two cores. > > > > I checked the /proc/cpuinfo, which shows there are only two processors, > > I also used the top command, and it also says only two cpu there. > > > > Can someone tell me actually how many cores are contained inside these > large > > instances? > > Did I misunderstand these terms that Amazon talks about ?? > > > > Thanks > > > > Jiamin Lu > > > > > > > > -- > Harsh J > -- Jiamin Lu Fernuniversität Hagen D-58084 Hagen GERMANY Phone: +49-2331-987-4276 Email: jiamin....@gmail.com
