Chelsio Communications Chelsio T4 Guía de usuario descargar pdf (Pagina 103)

Chapter VII. iSCSI PDU Offload Target

There are many specific parameters that can be configured, some of which are iSCSI specific

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               

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have no default.

Before starting any iSCSI target, an iSCSI configuration file must be created. An easy way to

create this file is to use the provided sample configuration file and modify it. This file can be

named anything and placed in any directory but it must be explicitly specified when using iscsictl

by using the f option. To avoid this, put configuration file in the default directory

(/etc/chelsio-iscsi) and name it the default file name (chiscsi.conf).

4.2.1. “On the fly” Configuration Changes

Parameters for the most part can be changed while an iSCSI node is running. However, there

are exceptions and restrictions to this rule that are explained in a later section that describes the

details of the iSCSI control tool iscsictl.

4.3. A Quick Start Guide for Target

This section describes how to get started quickly with a Chelsio iSCSI target. It includes:

Basic editing of the iSCSI configuration file.

Basic commands of the iSCSI control tool including how to start and stop a target.

4.3.1. A Sample iSCSI Configuration File

The default Chelsio iSCSI configuration file is located at /etc/chelsio-iscsi/chiscsi.conf.

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To configure an iSCSI target, there are three required parameters (in the form of key=value

pairs) needed as follows:

TargetName  A worldwide unique iSCSI target name.

PortalGroup  The portal group tag associating with a list of target IP address (es) and port

number(s) that service the login request. The format of this field is a Chelsio specific iSCSI

driver parameter which is described in detail in the configuration file section.

TargetDevice  A device served up by the associated target. A device can be:

 A block device (for example, /dev/sda)

 A virtual block device (for example, /dev/md0)

 A RAM disk

 A regular file

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