Simple iSCSI application for Red Hat Enterprise Storage Management

Red Hat Enterprise Storage Management-iscsi simple application shared storage: Ø das: directattachedstorage directly attached storage nIDEnscsi memory cabinet 715 Ø nas: networkattachedstorage network attached storage (with its own operating system) nsamba Simple iscsi application for Red Hat Enterprise Storage Management

Shared storage:

ØDas: Direct attached storage directly attaches storage

N IDE

NScsiCabinet 7 15

ØNas: Network attached storage (with its own operating system)

NSamba nfsFile-level sharing

N Low efficiency with lock mechanism and push function

ØSan: Storage Area Network

NFc-san(Fiber channer storage area network optical fiber) fc-switch

U Scsi Expensive format N Ip-san (Iscsi: ip) the device is a common device.

UTarget initiatorAuthentication (ip-account -- cheap)

N High Efficiency Cluster File System RedHat: gfs2 Oracle: ocfs2 DRBD : Cheap file synchronization Solution

HA:

Active --- standby Active --- active Split-brain cluster: split-brain portioned cluster

Solution: stonith (also called fence)

Hardware: (power switch, ssh, meatware)

Module: hp, ibm, and sun machine module

Block Storage: ext2 and ext3 (the local file system does not have a lock mechanism or a push mechanism)

Cluster File System: Lock Mechanism and push mechanism -- redhat: gfs (1-2) oracle :( ocfs2)

IscsiStorage Management:

Target(Tgtd) (server)

Scsi-target-utils.i386 3260Authentication (ip-chanper)

Ø Target id Number Ø Logical unit number Iqn Format name (iqn. date (year-month). Domain Name anti-write. string: substring)

Example: iqn.2012-05.com. a. node1: target

Management: tgtadm -- lld [driver] -- op [operation] -- mode [mode] [OPTION]...

-- Lld [driver] -- op new -- mode target -- tid = [id] -- targetname [name]

-- Lld [driver] -- op show -- mode target

-- Lld [driver] -- op new -- mode = logicalunit -- tid = [id] -- lun = [lun]

-- Backing-store [path]

Initiator(Client)

Simple iscsi application case of Red Hat Enterprise Storage Management:

Application topology:

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