Study Note one: Compress February 5, 2015 10:23 compress commandThe zip file extension is mostly *.tar,*. tar.gz,*.tgz,*.gz,*. Z,*.bz2 Common compression commands gzip with bzip2, where bzip2 compression is better than gziptar can be used for file packaging and can support gzip and bzip2 compression compression tar-jvc-f filename.tar.bz2/directoryQuery Tar-jtv-f filename.tar.bz2Unzip tar-jxv-f filename.tar.bz2-c/puorose/directory The Dump command can back up a file system or a single directory the backup of Dump can be 0~9 level Differential backup for file system. Where level 0 is a full backup The Restore command restores the backup file that was built by dump to create a new disc to burn data, you can use the mkisofs command to build can be written to CD or DVD burner via Cdrecord DD can back up the full partition or disk because DD can read the hard disk's sector surface data Cpio is a pretty good backup command, but it has to be read into the preliminary file with a similar find command. Test walkthroughsgzip and bzip2 compression tar packaging use gzip compression format and exclude log and BZ compression files [Email protected] schema]$ tar-zcv-f schema_tar_test.tar.gz--exclude=/u03/schema/*.log--exclude=/u03/schema/*.bz/ U03/schemause bzip2 compression format and exclude log and gz compression files [Email protected] schema]$ tar-jcv-f schema_tar_test.tar.bz2--exclude=/u03/schema/*.log--exclude=/u03/schema/*.gz /u03/schema view both compression ratios [[email protected] schema]$ du-sh schema_tar_test.tar.*160k Schema_tar_test.tar.bz2260K Schema_ Tar_test.tar.gzDump backup file system Simulates a file drive letter [[email protected] u04]# dd if=/dev/zero of=/u04/loop_mount bs=1m count=10241024+0 Records in1024+0 Records out1073741824 bytes (1.1 GB) copied, 8.35942 seconds, $ mb/s[[email protected] u04]# mkfs.ext3/u04/l Oop_mount[[email protected] u04]# mount-o loop /u04/loop_mount/u04/mount_loop[[email protected] u04 ]# df-hfilesystem Size Used Avail Use% Mounted on/dev/sda2 9.7G 5.4G 3.9g 59%//dev/sda6 31G 1.9g 28g 7%/u02/dev/sda5 30g 21g 7.1g 75%/u01/dev/sda1 190m 23m 158m 13%/boottmpfs 1005M 0 1005m 0%/dev/shm/dev/sdb 504g 263g 216g 55%/u03/dev/sdc1 504g 312g 167g 66%/u04/u04/loop_mount 1008m 34m 924m 4%/u04/mount_loop create dump backup directory [[email protected] u04]# mkdir backup[[email protected] u04]# dump-0-j-f/u04/backup/dump.bak/u04/ LOOP_MOUNT DUMP:DUMPING/DEV/SDC1 (/u04 (dir/loop_mount)) to/u04/backup/dump.bak dump:label:none DU mp:writing kilobyte records dump:compressing output at compression level 2 (bzlib) dump:mapping (Pass I) [Regular files] dump:mapping (Pass II) [directories] dump:estimated 1067027 blocks. dump:volume 1st arted with block 1 at:thu feb 5 10:08:25 2015 dump:dumping (Pass III) [directories] dump:dumping (Pas s IV) [regular files] dump:closing/u04/backup/dump.bak dump:volume 1 completed at:thu Feb 5 10:09:01 2015 Dump:volume 1 took 0:00:36 dump:volume 1 transfer rate:156 kb/s dump:volume 1 1067020kB uncomp ressed, 5627kB compressed, 189.626:1 dump:1067020 blocks (1042.01MB) on 1 volume (s) dump:finished in Seco NDS, Throughput 29639 kbytes/sec Dump:date of this, 0 Dump:thu feb 5 10:08:25 2015 dump:date this DUMP completed: Thu F eb 5 10:09:01 2015 dump:average transfer rate:156 kb/s dump:wrote 1067020kB uncompressed, 5627kB comp ressed, 189.626:1 Dump:dump is done[[email protected] u04]# ls-l/u04/backup/total 5640-rw-r--r--1 root root 5762814 feb 5 10:09 dump.bak[[email protected] u04]# du-sh/u04/backup/5.6m /u04/backup/ Test add file to directory [[email protected] u04]# CP ogg.tar.gz/u04/mount_loop/[[email protected] u04]# Du-sh/u04/mount_ loop/503m /u04/mount_loop/[[email protected] u04]# dump-1-j-f/u04/backup/dump.bak/u04/loop _mountdump:only Level 0 dumps is allowed on a subdirectory ( not a single file system ) Dump:the entire dump is aborted.backup boot drive letter test [email protected] u04]# dump-0-j-f/u04/backup/dump_boot.bak /dev/sda1 [Email protected] u04]# dump-1-j-f/u04/backup/dump_boo01.bak/dev/sda1 DUMP:WARNING:There are no inferior level dump On this filesystemDUMP:WARNING:Assuming A Level 0 DUMP by default (boot directory also no differential backup?) )[Email protected] u04]# cd/u04/backup/[[email protected] backup]# lsdump.bak dump_boo01.bak dump_boot.bak[[email prote CTED] backup]# du-sh *5.6m dump.bak16m dump_boo01.bak16m Dump_boot.bak
| Database |
Ip |
Gzip |
|
Bzip2 |
|
| Xxxxx |
xxx.xxx.xxx.xxx |
2015/3/22 10:22:00 ~2015/3/23 01:5,600 3 hours |
16GB |
2015/03/25 09:05~2015/03/26 00:56 16 hours |
9.2GB |
(Linux learning Note one: compression) [20180209]
