An error occurred Please try your request again later Try searching for what you need This page doesn’t exist. Cookies are disabled Please enable cookies and refresh the page. A dump that is larger than the output medium is broken into. On most media the size is determined by writing until an. This can be enforced. On media that cannot reliably return an end- of- media indication.
Dump, rdump - file system backup CONTENTS Synopsis Description. The recommended cache size is between 8 and. The -W option causes dump to print out, for each file system in the dumpdates file the most recent dump date. By default, the same output file name is used for each volume. The file system to be dumped is specified by the argument. Creating virsh Dump Files. --bypass-cache uses O_DIRECT to bypass the file system cache. --memory-only the dump file will be saved as an elf file, and will only include domain’s memory and cpu common register value.The following options are supported by. A level 0, full backup. A level number above 0. The default level is 0. Bypass all tape length considerations, and enforce writing. This fits best for most modern tape drives. Use of this option is particularly. The number of kilobytes per output volume, except that if it is. This option overrides the calculation of tape size. The number of kilobytes per output block. The default block size is 1. Specify the cache size in megabytes. This will greatly improve performance. The recommended cache size is between 8 and 3. Change the defaults for use with a cartridge tape drive, with a density. Specify an alternate path to the. Set tape density to. The default is 1. BPI. Write the backup to. Multiple file names may be given as a single argument separated by commas. Each file will be used for one dump volume in the order listed. If the name of the file is of the form. The default path name of the remote. P pipecommand. script string defined by. This child pipeline’s. After every volume, the writer side of the pipe is closed and. Subject to the media size specified by. The default honor level is 1. This option is to notify. To obtain a consistent dump image. The snapshot is unlinked as soon as the dump starts, and. This option is ignored for unmounted or read- only file systems. This problem can be corrected by creating a. Be rsync- friendly. Normally dump stores the date of the current. These scattered changes significantly slow down rsync or. This option sets both dates to the epoch, permitting. Be even more rsync- friendly. This option disables the storage of the actual inode access time. This option permits rsync to be even more efficient. Display an estimate of the backup size and the number of. Attempt to calculate the amount of tape needed. If this amount is exceeded. It is recommended to be a bit conservative on this option. The default tape length is 2. Use the specified date as the starting time for the dump. The format of date is the same as that of. This option is useful for automated dump scripts that wish to. There may be only one entry per file system at each level. The default path for the. Tell the operator what file systems need to be dumped. This information is gleaned from the files. Directories and regular files which have their. In addition to alerting all operators implied by the. Since making a dump involves a lot of time and effort for full dumps. If writing that volume fails for some reason. The output is verbose. In the event of a catastrophic disk event, the time required. An efficient method of staggering incremental dumps. Always start with a level 0 backup, for example. This should be done at set intervals, say once a month or once every two months. After a level 0, dumps of active file systems (file systems with files. Tower of Hanoi algorithm. For the daily dumps, it should be possible to use a fixed number of tapes. Each week, a level 1 dump is taken, and. Hanoi sequence repeats beginning with 3. For weekly dumps, another fixed set of tapes per dumped file system is. After several months or so, the daily and weekly tapes should get. Fewer than 3. 2 read errors on the file system are ignored, though all. This is a bit of a compromise. In practice, it is possible to generate read errors when doing dumps. Since dumps are often done in an unattended fashion using. Operator intervention would result in the. However, there is nothing wrong with a dump tape written when this sort. Each reel requires a new process, so parent processes for. It would be nice if. This will be fixed in a later version of. Presently, it works if you set it setuid (like it used to be), but this.
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