NAME

       iser — iSCSI Extensions for RDMA (iSER) driver

SYNOPSIS

       To compile this driver into the kernel, place the following line in the kernel configuration file:

             device iser

       Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

             iser_load="YES"

DESCRIPTION

       The  iser  (iSCSI  Extensions  for RDMA) initiator driver extends the iSCSI protocol to RDMA.  It permits
       data to be transferred directly into and out of SCSI buffers without intermediate data copies.  iSER uses
       the RDMA protocol suite to supply higher bandwidth for block storage transfers (zero copy behavior).   To
       that  fact,  it  eliminates  the TCP/IP processing overhead while preserving the compatibility with iSCSI
       protocol.  The initiator is the iSCSI/iSER client, which connects  to  an  iSCSI/iSER  target,  providing
       local  access  to  a  remote  block device.  The userland component is provided by iscsid(8) and both the
       kernel and userland are configured using iscsictl(8).

SYSCTL VARIABLES

       The following variables are available as both sysctl(8) variables and loader(8) tunables:

       kern.iser.debug
               Verbosity level for log messages from the iser driver.  Set to 0 to disable logging or 1 to  warn
               about potential problems.  Larger values enable info and debugging output.  Defaults to 0.

SEE ALSO

       iscsi(4), iscsi.conf(5), iscsictl(8), iscsid(8)

HISTORY

       The iser subsystem first appeared in FreeBSD 11.0.

AUTHORS

       The iser subsystem was developed by Max Gurtovoy <maxg@mellanox.com> and
       Sagi Grimberg <sagig@mellanox.com> under sponsorship from Mellanox Technologies.

Debian                                            June 6, 2016                                           ISER(4)