[CentOS] Vsftpd & Iscsi - fast enough

Tue May 22 19:02:15 UTC 2007
Stephen John Smoogen <smooge at gmail.com>

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

Thus you end up with a gigabit card which is 10^6 bits but the OS
measures in 2^20 bits.


Stephen J Smoogen. -- CSIRT/Linux System Administrator
How far that little candle throws his beams! So shines a good deed
in a naughty world. = Shakespeare. "The Merchant of Venice"