伊人一二三,伊人91影院,久艹A V

XFS文件系統(tǒng)是硅谷圖形公司(Silicon Graphics Inc,簡(jiǎn)稱SGI)開發(fā)的用于IRIX(一個(gè)UNIX操作系統(tǒng))的文件系統(tǒng)，后將XFS移植到Linux操作系統(tǒng)上。XFS是高級(jí)日志文件系統(tǒng)，其特點(diǎn)極具伸縮性，同時(shí)也很健壯。2000年5月XFS通過GNU通用公共許可證移植到Linux系統(tǒng)上，通過十多年的不斷修改已經(jīng)成為一款非常成熟的文件系統(tǒng)。在多項(xiàng)針對(duì)XFS的性能測(cè)試上，XFS都取得了不俗的成績(jī)，高并發(fā)環(huán)境下甚至已經(jīng)超過ext4。

一、XFS文件系統(tǒng)的備份與恢復(fù)

XFS文件系統(tǒng)提供了整個(gè)分區(qū)備份的工具xfsdump供用戶使用，用戶可以在不借助第三方軟件的情況下對(duì)XFS文件系統(tǒng)上的數(shù)據(jù)實(shí)施備份。

創(chuàng)建XFS分區(qū)及測(cè)試文件

[root@localhost ~]# ls /dev/sd*

/dev/sda? /dev/sda1? /dev/sda2? /dev/sdb

[root@localhost ~]# fdisk /dev/sdb

Welcome to fdisk (util-linux 2.23.2).

Changes will remain in memory only, until you decide to write them.

Be careful before using the write command.

Command (m for help): p

Disk /dev/sdb: 21.5 GB, 21474836480 bytes, 41943040 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk label type: dos

Disk identifier: 0x08a5199d

? Device Boot? ? ? Start? ? ? ? End? ? ? Blocks? Id? System

Command (m for help): n

Partition type:

? p? primary (0 primary, 0 extended, 4 free)

? e? extended

Select (default p): p

First sector (2048-41943039, default 2048):

Using default value 2048

Last sector, +sectors or +size{K,M,G} (2048-41943039, default 41943039): +1G

Partition 1 of type Linux and of size 1 GiB is set

Command (m for help): p

Disk /dev/sdb: 21.5 GB, 21474836480 bytes, 41943040 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk label type: dos

Disk identifier: 0x08a5199d

? Device Boot? ? ? Start? ? ? ? End? ? ? Blocks? Id? System

/dev/sdb1? ? ? ? ? ? 2048? ? 2099199? ? 1048576? 83? Linux

Command (m for help): w

The partition table has been altered!

Calling ioctl() to re-read partition table.

Syncing disks.

[root@localhost ~]# partprobe

Warning: Unable to open /dev/sr0 read-write (Read-only file system).? /dev/sr0 has been opened read-only.

[root@localhost ~]# ls /dev/sd*

/dev/sda? /dev/sda1? /dev/sda2? /dev/sdb? /dev/sdb1

[root@localhost ~]# mkfs.xfs -f /dev/sdb1

meta-data=/dev/sdb1? ? ? ? ? ? ? isize=512? ? agcount=4, agsize=65536 blks

? ? ? ? =? ? ? ? ? ? ? ? ? ? ? sectsz=512? attr=2, projid32bit=1

? ? ? ? =? ? ? ? ? ? ? ? ? ? ? crc=1? ? ? ? finobt=0, sparse=0

data? ? =? ? ? ? ? ? ? ? ? ? ? bsize=4096? blocks=262144, imaxpct=25

? ? ? ? =? ? ? ? ? ? ? ? ? ? ? sunit=0? ? ? swidth=0 blks

naming? =version 2? ? ? ? ? ? ? bsize=4096? ascii-ci=0 ftype=1

log? ? ? =internal log? ? ? ? ? bsize=4096? blocks=2560, version=2

? ? ? ? =? ? ? ? ? ? ? ? ? ? ? sectsz=512? sunit=0 blks, lazy-count=1

realtime =none? ? ? ? ? ? ? ? ? extsz=4096? blocks=0, rtextents=0

[root@localhost ~]# blkid /dev/sdb1? ? ?

/dev/sdb1: UUID="61a5e59d-92d3-458d-ac09-7d945469cda6" TYPE="xfs"

[root@localhost ~]# mkdir /file

[root@localhost ~]# echo "/dev/sdb1 /file xfs defaults 0 0" >> /etc/fstab

[root@localhost ~]# mount -a

[root@localhost ~]# df -h

Filesystem? ? ? ? ? ? Size? Used Avail Use% Mounted on

/dev/mapper/rhel-root? 17G? 1.9G? 16G? 12% /

devtmpfs? ? ? ? ? ? ? 901M? ? 0? 901M? 0% /dev

tmpfs? ? ? ? ? ? ? ? ? 912M? ? 0? 912M? 0% /dev/shm

tmpfs? ? ? ? ? ? ? ? ? 912M? 8.7M? 903M? 1% /run

tmpfs? ? ? ? ? ? ? ? ? 912M? ? 0? 912M? 0% /sys/fs/cgroup

/dev/sr0? ? ? ? ? ? ? 3.8G? 3.8G? ? 0 100% /yum

/dev/sda1? ? ? ? ? ? 1014M? 143M? 872M? 15% /boot

tmpfs? ? ? ? ? ? ? ? ? 183M? ? 0? 183M? 0% /run/user/0

/dev/sdb1? ? ? ? ? ? 1014M? 33M? 982M? 4% /file

[root@localhost ~]# cd /file/

[root@localhost file]# ls

[root@localhost file]# touch file{1..100}

[root@localhost file]# ls

file1? ? file16? file23? file30? file38? file45? file52? file6? file67? file74? file81? file89? file96

file10? file17? file24? file31? file39? file46? file53? file60? file68? file75? file82? file9? file97

file100? file18? file25? file32? file4? file47? file54? file61? file69? file76? file83? file90? file98

file11? file19? file26? file33? file40? file48? file55? file62? file7? file77? file84? file91? file99

file12? file2? file27? file34? file41? file49? file56? file63? file70? file78? file85? file92

file13? file20? file28? file35? file42? file5? file57? file64? file71? file79? file86? file93

file14? file21? file29? file36? file43? file50? file58? file65? file72? file8? file87? file94

file15? file22? file3? file37? file44? file51? file59? file66? file73? file80? file88? file95

備份XFS分區(qū)

[root@localhost file]# mkdir /backup?

[root@localhost file]# yum install -y xfsdump

[root@localhost file]# xfsdump -f /backup/file.bak /file

#利用xfsdump備份掛載點(diǎn)/file對(duì)應(yīng)的分區(qū)

xfsdump: using file dump (drive_simple) strategy

xfsdump: version 3.1.4 (dump format 3.0) - type ^C for status and control

============================= dump label dialog ==============================

#輸入dump會(huì)話標(biāo)簽

please enter label for this dump session (timeout in 300 sec)

-> file.bak

session label entered: "file.bak"

--------------------------------- end dialog ---------------------------------

xfsdump: level 0 dump of localhost.localdomain:/file

xfsdump: dump date: Thu Oct 31 22:16:02 2019

xfsdump: session id: 02a1445f-5ff3-4518-ab2c-888d9e2a4c44

xfsdump: session label: "file.bak"

xfsdump: ino map phase 1: constructing initial dump list

xfsdump: ino map phase 2: skipping (no pruning necessary)

xfsdump: ino map phase 3: skipping (only one dump stream)

xfsdump: ino map construction complete

xfsdump: estimated dump size: 52800 bytes

============================= media label dialog =============================

#輸入媒體標(biāo)簽

please enter label for media in drive 0 (timeout in 300 sec)

-> file

media label entered: "file"

--------------------------------- end dialog ---------------------------------

xfsdump: creating dump session media file 0 (media 0, file 0)

xfsdump: dumping ino map

xfsdump: dumping directories

xfsdump: dumping non-directory files

xfsdump: ending media file

xfsdump: media file size 86544 bytes

xfsdump: dump size (non-dir files) : 0 bytes

xfsdump: dump complete: 27 seconds elapsed

xfsdump: Dump Summary:

xfsdump:? stream 0 /backup/file.bak OK (success)

xfsdump: Dump Status: SUCCESS

[root@localhost file]# ls /backup/

#已經(jīng)成功創(chuàng)建備份文件

file.bak

恢復(fù)過程