Re: Failover time of iSCSI multipath devices.

2010-03-16 Thread Alex Zeffertt
Mike Christie wrote: On 03/15/2010 05:56 AM, Alex Zeffertt wrote: The bugzilla ticket requests a merge of two git commits, but neither of those contain the libiscsi.c change that addresses bug #2. Was this a mistake, or did you deliberately omit that part of your speed-up-conn-fail-take3.patch

iSNS implementation

2010-03-16 Thread Gopu Krishnan
Hi All, Can someone explain about what is the usage of this print_scn_pdu() function defined in isns.c file. Thanks Gopal. -- You received this message because you are subscribed to the Google Groups open-iscsi group. To post to this group, send email to open-is...@googlegroups.com. To

Understanding iscsi kernel space codes

2010-03-16 Thread Yangkook Kim
Hi, all. I'm now trying to study open-iscsi kernel space codes. Basically my goal is understanding how iscsi packet is created/sent/recieved in kernel space. Unlike user space codes, there is no main function, so not sure about where I should start from. There are four kernel codes files.

Re: Understanding iscsi kernel space codes

2010-03-16 Thread Peter Chacko
iscsi_tcp.c if you are not a scsi guy already. Other wise scsi_transport.cGood luck.. On Tue, Mar 16, 2010 at 8:52 PM, Yangkook Kim yangkook...@gmail.com wrote: Hi, all. I'm now trying to study open-iscsi kernel space codes. Basically my goal is understanding how iscsi packet is

Re: [Iscsitarget-devel] iSNS implementation

2010-03-16 Thread Ross S. W. Walker
On Mar 16, 2010, at 9:24 AM, Gopu Krishnan gopu.0...@gmail.com wrote: Hi All, Can someone explain about what is the usage of this print_scn_pdu () function defined in isns.c file. You have the source code in front of you why don't you explain to me what it does and if you see a problem

x86 vs x86_64 and iSCSI

2010-03-16 Thread dancho
Hello, We are buying some recent 64-bit capable machines to serve as iSCSI backends to a file-server. I was wondering whether somebody has input on which architecture x86 or x86_64 we should use for our iSCSI backends if we use the open- iscsi driver? Does it matter at all? What are some factors

Re: Failover time of iSCSI multipath devices.

2010-03-16 Thread Mike Christie
On 03/16/2010 04:50 AM, Alex Zeffertt wrote: Mike Christie wrote: On 03/15/2010 05:56 AM, Alex Zeffertt wrote: The bugzilla ticket requests a merge of two git commits, but neither of those contain the libiscsi.c change that addresses bug #2. Was this a mistake, or did you deliberately omit

Re: Failover time of iSCSI multipath devices.

2010-03-16 Thread bennyturns
I am trying work out a formula for total failover time of my multipathed iSCSI device so far I have: failover time = nop timout + nop interval + replacement_timeout seconds + scsi block device timeout(/sys/block/sdX/device/timeout) Is there anything else that I am missing? -b On Mar 15, 4:53 

Re: Failover time of iSCSI multipath devices.

2010-03-16 Thread Mike Christie
On 03/16/2010 04:02 PM, bennyturns wrote: I am trying work out a formula for total failover time of my multipathed iSCSI device so far I have: failover time = nop timout + nop interval + replacement_timeout seconds + scsi block device timeout(/sys/block/sdX/device/timeout)

Re: Failover time of iSCSI multipath devices.

2010-03-16 Thread bennyturns
Thks Mike, that explains it :) On Mar 16, 5:27 pm, Mike Christie micha...@cs.wisc.edu wrote: On 03/16/2010 04:02 PM, bennyturns wrote: I am trying work out a formula for total failover time of my multipathed iSCSI device so far I have: failover time = nop timout + nop interval +