Red Hat ENTERPRISE LINUX - ONLINE STORAGE RECONFIGURATION GUIDE BETA Manuale Utente Scaricare il pdf (Pagina 6)

6redhat.com Technology overview What’s new in Red Hat Enterprise Linux 7

A system administrator can use the OpenLMI Software Provider to remotely to add or remove

services, determine the state of the service (started, running, stopped, failed), enable, start, or

restart a service.

fILe sYstems

•Red Hat Enterprise Linux now supports XFS le systems that are up to 500TB in size. The

previous support limit was 100TB.

•BTFS (Brtfs) is a relatively young le system especially useful for local, large-scale use cases.

BTFS includes basic volume management, snapshot support, and full data and metadata integrity

checksumming, and a command-line interface that makes these advanced features easier to use

than in other large-scale le systems.

•Ext4 supports a le system that is 50TB in size, up from 16TB.

•The Red Hat Enterprise Linux PNFS client now supports all commercially available server

layout types.

•TheCIFSnetworkinglesystem with server message block (SMB) protocol updates will provide

better performance, security, and more features than were available with previous protocols.

•GFS2 commands now more accurately deal with RAID stripe alignment and placement of critical

elements such as journals and resource groups. This increases the scalability and performance of

GFS2 when the le system is being created and when it is used.

storaGe

ISCSI AND FCOE TARGETS

Red Hat Enterprise Linux 7 beta includes a new software implementation of the iSCSI (RFC-3720

mode) and Fibre Channel over Ethernet (FCoE) targets in the kernel, as opposed to the user space,

as was the case previously. This new implementation makes it possible to replace expensive shared

storage arrays to Linux-based storage appliances built on commodity hardware.

DYNAMIC LUN DETECTION

Logical units (LUN) can now be dynamically recognized by the operating system with no manual

intervention, resulting in fewer reboots and less downtime.

SNAPPER

Snapper is a new utility that creates, deletes, labels, and organizes snapshots of the Btrfs le

system and logical volume manager block device. The additional information and tooling give

system administrators more control over their backup environment.

securItY

DYNAMIC FIREWALL

With rewalld, a rewall does not have to be stopped in order to change its rules. This increases the

security of the system by eliminating vulnerability and adding the ability to respond to threats by

quickly activating new rules. In addition to dynamic conguration capabilities, rewalld supports a

powerful rules language that simplies conguring rewalls.

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Red Hat ENTERPRISE LINUX - ONLINE STORAGE RECONFIGURATION GUIDE BETA Manuale Utente Pagina 6