Tuesday 9 November 2010

Experience While Copying a 42GB file into a Seagate USB Hardrive in Ubuntu Linux…

First of all i will split the file into 10GB pieces. The file name is: enwiki-20070908-stub-meta-history.xml

fawad@crete:~/wiki$ split -b 4000m enwiki-20070908-stub-meta-history.xml

Now i will copy a piece by piece into my seagate external hardrive. I am copying this file from a remote server to my machine

root@fawad-laptop:/home/fawad# scp fawad@crete.ex.nii.ac.jp:/home/fawad/wiki/enwiki-20070908-stub-meta-history.xml /media/usb0/niidata/split/
fawad@crete.ex.nii.ac.jp’s password:
enwiki-20070908-stub-meta-history.xml 10% 4091MB 10.5MB/s 57:03 ETAFile size limit exceeded (core dumped)
This means only files less than 4GB are supported. So i again spilled the files to 4GB file each.

Another important thing to note is that i had to use root login to copy file to my external seagate USB hardrive.

Now once i have splited the files into 4GB chunks. Now use the following command to copy all the files from this folder to one of the folder in the seagate harddrive.

root@fawad-laptop:/home/fawad# scp -r fawad@crete.ex.nii.ac.jp:/home/fawad/wiki/wikidata/ /media/usb0/niidata/wikifawad@crete.ex.nii.ac.jp’s password:
.nfs0000000000d5005100000001 100% 435MB 10.6MB/s 00:41
xad 27% 1101MB 9.5MB/s 05:05 ETARead from remote host crete.ex.nii.ac.jp: Connection reset by peer
xad 100% 4000MB 9.8MB/s 06:49
xag 100% 1233MB 9.8MB/s 02:06
xac 38% 1522MB 10.6MB/s 03:53 ETAh
xac 43% 1734MB 11.1MB/s 03:25 ETA
xac 100% 4000MB 10.1MB/s 06:38
xaf 100% 4000MB 10.2MB/s 06:32
xae 100% 4000MB 10.5MB/s 06:22
xaa 100% 4000MB 9.9MB/s 06:46
xab 39% 1573MB 9.9MB/s 04:05 ETARead from remote host crete.ex.nii.ac.jp: Connection reset by peer
xab 100% 4000MB 9.6MB/s 06:57

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