[openib-general] [query]maximum no. of connections per session in iser initiator

[Erez Zilber]

keshetti mahesh wrote:
> Please CC me the responses to this mail ID
>
> thanks and regards,
> Mahesh.
>
> */keshetti mahesh <k_mahesh85 at yahoo.co.in>/* wrote:
>
>     hi all,
>
>     recently i had gone through the iser initiator code in OFED and
>     saw one thing, the maximum no. of connections allowed per session
>     is 8.
>
I guess that you're talking about this piece of code:

#define ISCSI_ISER_MAX_CONN 8
#define ISER_MAX_CQ_LEN ((ISER_QP_MAX_RECV_DTOS + \
ISER_QP_MAX_REQ_DTOS) * \
ISCSI_ISER_MAX_CONN)

It is related to the cq used by iSER. We use it in order to define the
max len of the cq (the same cq is used for the sq & rq). It means that
per HCA, 8 connections may be opened.

>     what is the constraint for this
>     limit.
>     And in the another iscsi transport i.e TCP this variable is only one.
>
Where do you see that in iscsi_tcp?
>
>     whether this limit is imposed by iSCSI or by transport layer(TCP
>     or iSER) ?
>
>     BTW is there any such limit for the no. of sessions allowed at
>     atime in this initiator?
>
>     thanks and regards,
>     Mahesh.
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____________________________________________________________

Erez Zilber | 972-9-971-7689

Software Engineer, Storage Team

Voltaire – _The Grid Backbone_

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www.voltaire.com <http://www.voltaire.com/>