![]() ![]() ![]() Its the fastest, easiest way to copy a file directly from the. We were basically implementing the same sorts of checks that ZFS does internally. Copying directories: The cp command can also copy entire directories. The CP command in Linux copies the contents of the source file into the destination file. Syntax cp -R srcdir destdir Example With verbose (-v): cp -Rv dev bak 'dev/main.c' -> 'bak/dev/main.c' 'dev/test.c' -> 'bak/dev/test. With that we could quickly detect a corrupted file and restore from backups. cp -R command is used for recursive copy of all files and directories in source directory tree. I then had another script that would run periodically and check the file against the checksum stored in the database. In the distant past, for a client, I implemented a database system that stored checksum information on all files stored under a particular directory. ZFS-FUSE has performed quite well for me over the last few years. Every week I run a "zpool scrub" which goes through and re-reads all the data and verifies checksums. cp can also be used to copy entire directories into a new location. cp is used for copying files from one location to other. ![]() It will detect, via checksums, that one of the discs returned corrupted information and will use the redundancy data to repair that disc.īecause of the way the checksumming in ZFS is designed, I felt that I could rely on it to store infrequently used data for long periods of time. It’s often called the copy command in Linux and it is actually short for copy and it does exactly as it name suggests: it copies. On the other side, as you can read in the POSIX manual page of cp, -r behavior is implementation-defined. ZFS has a benefit over RAID-5 in that it can detect and repair errors in the data stored on the individual discs, even if the drives do not report a read error while reading the data. 5 Answers Sorted by: 99 While -R is posix well-defined, -r is not portable On Linux, in the GNU and BusyBox implementations of cp, -r and -R are equivalent. cp commands keeps all the files at source intact and. My thinking was that my personal photos, scanned documents, and other similar files were things that I may access only occasionally, so it may be a very long time, say a year or more, before I notice that a file has been corrupted due to a drive error or the like.īy that time, all of the backup copies I have may be this bit-rotted version of the file(s). Either you can copy-paste the selected text using Ctrl + Shift + C and Ctrl + Shift + V in which you have freedom what things to copy OR Redirect the text to a file using redirection program1 >outputfile.txt 2>errorfile.txt here, all the stdout will go to outputfile.txt while all the stderr will go to errorfile.txt. The cp (copy) command in Linux is used to copy files and directories from one location to another. The solution I chose was to use ZFS via the ZFS-FUSE driver on my storage server. Its often called the copy command in Linux and it is actually short for copy and it does exactly as. Several years ago I had the same demands as you do. One of the commands that you must know in Linux is cp. ![]()
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