[CentOS] Vsftpd & Iscsi - fast enough

[Ross S. W. Walker]

> -----Original Message-----
> From: centos-bounces at centos.org 
> [mailto:centos-bounces at centos.org] On Behalf Of Stephen John Smoogen
> Sent: Tuesday, May 22, 2007 3:02 PM
> To: CentOS mailing list
> Subject: Re: [CentOS] Vsftpd & Iscsi - fast enough
> 
> On 5/22/07, Mark Hull-Richter <mhullrich at gmail.com> wrote:
> > On 5/22/07, Ross S. W. Walker <rwalker at medallion.com> wrote:
> > >
> > > The ability of iSCSI to support high throughput depends on:
> > >
> > > 1) How the back-end storage being served up by iSCSI is configured
> > > 2) How the network interconnects between the iSCSI targets and
> > > initiators are configured
> > > 3) How well the FTP software does at reading the data 
> from disk and
> > > pumping it out the network
> > >
> > > 1Gbps ethernet can handle up to 115MB/s per interface. Using MPIO
> > > round-robin over several interfaces you can continue to 
> add throughput
> > > if the application can scale well across these multiple paths.
> > >
> >
> > I'm a little fuzzy on this Mb vs MB issue - which one is 
> megaBITS  and
> > which is megaBYTES, and is this a standard convention or ???
> >
> > Thanks.
> >
> 
> 20 years ago, Megabit was 2^20 bits (Mb) and Megabyte was 2^20 bytes
> (MB). The SI (ISO?) redid the units later to deal with the fact that
> Mega has a scientific definition of 10^6. This also allows the
> Hard-drive conspiracy to undersell you the number of bits on a disk.
> Nowadays,  Mb is supposed to mean 10^6 bits, and a Mibit means 2^20
> bits.
>
> Thus you end up with a gigabit card which is 10^6 bits but the OS
> measures in 2^20 bits.
> 
> References
> http://en.wikipedia.org/wiki/Megabit
> http://en.wikipedia.org/wiki/Megabyte

I always thought 10^6 was Mib/MiB and 2^10 was Mb/MB to keep the older
manuals and papers consistent, but that doesn't seem to match the
wikipedia... Is the wikipedia correct?

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