Date: Wed, 2 Jul 2014 09:37:39 -0700 From: Navdeep Parhar <nparhar@gmail.com> To: Slawa Olhovchenkov <slw@zxy.spb.ru> Cc: Kevin Oberman <rkoberman@gmail.com>, Sreenivasa Honnur <shonnur@chelsio.com>, FreeBSD Current <freebsd-current@freebsd.org>, "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org> Subject: Re: FreeBSD iscsi target Message-ID: <20140702163739.GA3957@ox> In-Reply-To: <20140702112609.GA85758@zxy.spb.ru> References: <20140626232727.GB1825@pwnie.vrt.sourcefire.com> <53ACE5B4.8070700@rice.edu> <CAPjTQNEsQGDHdApx0-=h63QN4o=zXKen0Y_6Ehj9_isfgac9tw@mail.gmail.com> <F2BBBB6E0068844991318A316F34795C390447@nice.asicdesigners.com> <20140701091252.GB3443@brick> <20140701231305.GA37246@zxy.spb.ru> <CAN6yY1t2qDzfeO37p2s_3=vzEVv5C813M0ttqjnM4tJGkkBhyA@mail.gmail.com> <20140702112609.GA85758@zxy.spb.ru>
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On Wed, Jul 02, 2014 at 03:26:09PM +0400, Slawa Olhovchenkov wrote: > On Tue, Jul 01, 2014 at 10:43:08PM -0700, Kevin Oberman wrote: > > > On Tue, Jul 1, 2014 at 4:13 PM, Slawa Olhovchenkov <slw@zxy.spb.ru> wrote: > > > > > On Tue, Jul 01, 2014 at 11:12:52AM +0200, Edward Tomasz Napierala wrote: > > > > > > > Hi. I've replied in private, but just for the record: > > > > > > > > On 0627T0927, Sreenivasa Honnur wrote: > > > > > Does freebsd iscsi target supports: > > > > > 1. ACL (access control lists) > > > > > > > > In 10-STABLE there is a way to control access based on initiator > > > > name and IP address. > > > > > > > > > 2. iSNS > > > > > > > > No; it's one of the iSCSI features that seem to only be used > > > > for marketing purposes :-) > > > > > > > > > 3. Multiple connections per session > > > > > > > > No; see above. > > > > > > I think this is help for 40G links. > > > > > > > I assume that you are looking at transfer of large amounts of data over 40G > > links. Assuming that tis is the case, yes, multiple connections per session > > Yes, this case. As I know, single transfer over 40G link limited by > 10G. This is not correct. A 40Gb link does not limit a single transfer to 10G. For example, on FreeBSD all common bandwidth benchmarks reach 40GbE line rate with a single TCP connection at mtu 1500. If a single transfer were limited to 10G you'd need 4 connections to get there. The physical signalling is over four lanes so it's easy to split a 40G link into four separate 10G links. But when running as a 40GbE (this is the usual case) the hardware will combine all the lanes into a single 40G data stream, and you get to use all of the bandwidth. Regards, Navdeep
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