RHEL 6 新功能介紹(上)

by Daphne Lin 16. 一月 2011 19:11

作者:王俊城

精誠資訊 恆逸教育訓練中心 資深講師


RHEL 6 終於問世,不僅有全新不同的操作畫面,還有非常多的新功能,也有新的認證及current window的機制(有效期限),相信您已經迫不及待想瞭解RHEL 6有哪些新功能:

l 安裝作業系統時,可以直接storage device,不管storage device支援或不支援multipath都可以安裝,過去必須要手動方式調整,RHEL 6則可以直接安裝到storage上,省了不少麻煩

l 預設使用ext4 filesystem,單一filesystem及單檔上限,都是16TB

l 如果是使用GFS2或XFS filesystem,則單一filesystem及單檔上限,可以到100TB

l 記憶體上限,32位元版本支援到16GB,64位元版本為2TB,如果搭配NUMA,則可以到64TB

l 支援10Gigabit Ethernet

l NFS預設為NFS 4,支援Pseudo-filesystem,可以隱藏NFS Server的目錄結構,有root jail的效果,NFS 4只需要使用TCP 2049,防火牆規則將更容易撰寫及維護,如果搭配Kerberos,可以實作加密的連線,提升安全性

l 支援多樣化的Network Storage,包括NFS V3/V4、iSCSI、Fibre Channel、FcoE(Fibre Channel over Ethernet)

l 安裝時支援更多的RAID選項,包括RAID 0、RAID 1、RAID 4、RAID 5、RAID 6、RAID 10

l 安裝時提供多種類型,有『基本伺服器』、『資料庫伺服器』、『網頁伺服器』、『虛擬主機』、『桌面環境』、『軟體開發工作站』、『最小安裝』,而且不需要Installation Number就可以選擇『負載平衡』、『高可用性』

l /etc/inittab開機流程的設定檔,在RHEL 6已經分為/etc/inittab及/etc/init這個目錄

l 取消了保留的RunLevel 7、8、9,只能使用預設的RunLevel 0-6

l kdump,一個將核心記憶體的資料dump的機制,預設為啟動,如果用不到此功能者,需要在安裝後的Post-install階段,手動關閉kdump

l Sandbox支援,利用SELinux實作出Sandbox功能,方便管理員在Sandbox內測試應用程式,不會影響系統的正常運作

l XACE(X Access Control Extension)支援,允許SELinux保護X Window的操作及執行

l 可以備份整個儲存設備加密的passphrase(密碼),RHEL 6支援將整個硬碟加密,在安裝過程中,會產生加密的 encryption key,需要key以及passphrase才能讀出加密後的資料,RHEL 6可以備份key及passphrase,以方便在修復資料時(例如:救援模式),還能讀出加密後的資料。

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更多RHEL 6 新功能介紹陸續登場,敬請期待….


您可在課程中了解更多的技術

相關學習資源︰【RHCE】Red Hat Linux認證工程師培訓班

                          【RHCA】Red Hat Linux認證系統部署工程師培訓班

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網路管理與通訊應用 | 王俊城Anderson Wang

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