Re: Vsftpd & Iscsi - fast enough

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On 5/22/07, Mark Hull-Richter <mhullrich@xxxxxxxxx> wrote:
On 5/22/07, Ross S. W. Walker <rwalker@xxxxxxxxxxxxx> 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


--
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"
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