Luam cov ntim rau cov tshuab khaws cia ntawm Linux server siv XCOPY

Nws tshwm sim tias koj yuav tsum tau txais daim ntawv theej tag nrho ntawm ib lub ntim hauv ib qho kev khaws cia cov ntaub ntawv (DSS), tsis yog snapshot, clone, tab sis tag nrho ntim. Tab sis lub kaw lus cia tsis tas yuav tso cai rau qhov no ua rau sab hauv siv nws tus kheej txhais tau tias. Nws zoo nkaus li tias qhov kev xaiv tsuas yog luam tawm los ntawm cov neeg rau zaub mov, tab sis qhov no tag nrho cov ntaub ntawv ntim yuav raug tsav los ntawm lub server nws tus kheej, lub network mus rau qhov system cia thiab chaw nres nkoj, thauj tag nrho cov khoom no. Tab sis muaj SCSI cov lus txib uas tuaj yeem tso cai rau koj ua txhua yam hauv lub kaw lus cia nws tus kheej, thiab yog tias koj lub kaw lus txhawb nqa VAAI los ntawm VMware, ces nws yuav luag 100% tias XCOPY (EXTENDED COPY) cov lus txhawb nqa, uas qhia txog dab tsi thiab qhov twg luam tawm, tsis muaj cov txheej txheem server thiab network.

Nws zoo li txhua yam yuav tsum yooj yim, tab sis kuv nrhiav tsis tau cov ntawv npaj ua tiav tam sim ntawd, yog li kuv yuav tsum rov tsim lub log. Linux raug xaiv rau lub server OS, thiab cov lus txib ddpt (http://sg.danny.cz/sg/ddpt.html) raug xaiv los ua cov cuab yeej theej. Siv cov kev sib xyaw ua ke no, koj tuaj yeem luam tawm txhua qhov ntim ntawm ib qho OS, txij li kev luam tawm tshwm sim los ntawm kev thaiv ntawm qhov chaw cia khoom sab. Txij li thaum nws yuav tsum tau luam thaiv los ntawm thaiv, thiab cov naj npawb ntawm cov blocks yuav tsum raug suav, cov lus txib blockdev tau siv los suav cov naj npawb ntawm cov xwm txheej zoo li no. Qhov siab tshaj plaws block loj tau txais kev sim; ddpt tsis tau ua haujlwm nrog lub thaiv loj. Qhov tshwm sim yog cov nram qab no yooj yim tsab ntawv:

#!/bin/bash
# first parameter = input device
# second parameter = output device
# device size must be the same
# changing bs variable can reduce speed, max speed should be at bs=32768. 32768 is max setting, lower settings should be calculated dividing by 2

set -o nounset
bs=32768
s=`blockdev --getsz $1`
i=0
while [ $i -le $s ]
do
ddpt of=$2 bs=512 oflag=xcopy,direct if=$1 iflag=xcopy,direct count=$bs verbose=-1 skip=$i seek=$i
i=$(( $i+$bs ))
done

Cia peb kuaj me ntsis! Zoo, raws li ib qho me me, 1TB cov ntaub ntawv tsis tau tsim sai thiab tshawb xyuas los ntawm md5sum :)

root@sales-demo-05:/home/vasilyk# blockdev --getsz /dev/mapper/mpathfs
2516582400
root@sales-demo-05:/home/vasilyk# blockdev --getsz /dev/mapper/mpathfr
2516582400
root@sales-demo-05:/home/vasilyk# mount /dev/mapper/mpathfs /xcopy_source/
mount: /xcopy_source: wrong fs type, bad option, bad superblock on /dev/mapper/mpathfs, missing codepage or helper program, or other error.
root@sales-demo-05:/home/vasilyk# mkfs /dev/mapper/mpathfs
mke2fs 1.44.1 (24-Mar-2018)
Discarding device blocks: done
Creating filesystem with 314572800 4k blocks and 78643200 inodes
Filesystem UUID: bed3ea00-c181-4b4e-b52e-d9bb498be756
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
        4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,
        102400000, 214990848

Allocating group tables: done
Writing inode tables: done
Writing superblocks and filesystem accounting information: done

root@sales-demo-05:/home/vasilyk# mount /dev/mapper/mpathfs /xcopy_source/
root@sales-demo-05:/home/vasilyk# ls -l /xcopy_source/
total 16
drwx------ 2 root root 16384 Aug 19 15:35 lost+found
root@sales-demo-05:/home/vasilyk# head -c 1T </dev/urandom > /xcopy_source/1TB_file
root@sales-demo-05:/home/vasilyk# ls -l /xcopy_source/
total 1074791444
-rw-r--r-- 1 root root 1099511627776 Aug 19 17:25 1TB_file
drwx------ 2 root root         16384 Aug 19 15:35 lost+found
root@sales-demo-05:/home/vasilyk# umount /xcopy_source
root@sales-demo-05:/home/vasilyk# mount /dev/mapper/mpathfr /xcopy_dest/
mount: /xcopy_dest: wrong fs type, bad option, bad superblock on /dev/mapper/mpathfr, missing codepage or helper program, or other error.
root@sales-demo-05:/home/vasilyk# cat xcopy.sh
#!/bin/bash
# first parameter = input device
# second parameter = output device
# device size must be the same
# changing bs variable can reduce speed, max speed should be at bs=32768. 32768 is max setting, lower settings should be calculated dividing by 2

bs=32768
s=`blockdev --getsz $1`
i=0
while [ $i -le $s ]
do
ddpt of=$2 bs=512 oflag=xcopy,direct if=$1 iflag=xcopy,direct count=$bs verbose=-1 skip=$i seek=$i
i=$(( $i+$bs ))
done
root@sales-demo-05:/home/vasilyk# time ./xcopy.sh /dev/mapper/mpathfs /dev/mapper/mpathfr
real    11m30.878s
user    2m3.000s
sys     1m11.657s

Dab tsi tshwm sim ntawm lub kaw lus cia nyob rau lub sijhawm ntawd:

Cia peb txuas ntxiv nrog Linux.

root@sales-demo-05:/home/vasilyk# mount /dev/mapper/mpathfr /xcopy_dest/
root@sales-demo-05:/home/vasilyk# ls -l /xcopy_dest/
total 1074791444
-rw-r--r-- 1 root root 1099511627776 Aug 19 17:25 1TB_file
drwx------ 2 root root         16384 Aug 19 15:35 lost+found
root@sales-demo-05:/home/vasilyk# mount /dev/mapper/mpathfs /xcopy_source/
root@sales-demo-05:/home/vasilyk# md5sum /xcopy_source/1TB_file
53dc6dfdfc89f099c0d5177c652b5764  /xcopy_source/1TB_file
root@sales-demo-05:/home/vasilyk# md5sum /xcopy_dest/1TB_file
53dc6dfdfc89f099c0d5177c652b5764  /xcopy_dest/1TB_file
root@sales-demo-05:/home/vasilyk#

Txhua yam ua tiav, tab sis sim thiab siv ntawm koj tus kheej txaus ntshai! Raws li qhov ntim ntim, nws yog qhov zoo dua los siv snapshots, rau pib.

Tau qhov twg los: www.hab.com