Re: iSCSI: more on StatRN

[csapuntz@cisco.com]

> While I know the values for certain operating systems, I would like to hear
> from
> people who can assert confidently that the TCP fail connection time < SCSI
> command failure time.

Prasenjit,

You bring up a good point.

However, iSCSI is the master of the TCP stack; it can abort the TCP
connection at any time for any reason. It doesn't need to wait for
TCP to fail; iSCSI can timeout and close the TCP connection.

The question becomes then: what performance on the TCP virtual circuit
is so unacceptable that iSCSI should tear down the TCP connection
and try to establish a new one?

As such, I don't believe the TCP-iSCSI interface has any effect on
the motivation for statRNs.

-Costa