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| author | Jan Sucan <jan@jansucan.com> | 2024-12-28 11:52:13 +0100 |
|---|---|---|
| committer | Ján Sučan <jan@jansucan.com> | 2024-12-31 08:26:48 +0100 |
| commit | e34296bbaa3b80a9c5c1bf6dba3ada28016f03de (patch) | |
| tree | 88c4302c93ee9c0ef8946a0fc305774c4d7d22be /README.md | |
| parent | 9280ff2c747a5a59f0a6e0cc6335b24de62cacc9 (diff) | |
Use options instead of positional arguments for file paths
Diffstat (limited to 'README.md')
| -rw-r--r-- | README.md | 16 |
1 files changed, 8 insertions, 8 deletions
@@ -18,16 +18,16 @@ is read twice when restoring it. Because of that, it is slower. > diff-dd help -> diff-dd backup [-s SECTOR_SIZE] [-b BUFFER_SIZE] INFILE BASEFILE OUTFILE +> diff-dd backup [-S SECTOR_SIZE] [-B BUFFER_SIZE] -i INFILE -b BASEFILE -o OUTFILE -> diff-dd restore [-s SECTOR_SIZE] [-b BUFFER_SIZE] DIFFFILE OUTFILE +> diff-dd restore [-S SECTOR_SIZE] [-B BUFFER_SIZE] -d DIFFFILE -o OUTFILE ## Backup Using ```diff-dd ``` for backup requires the full backup image to exist. Differential backup is created with: -> diff-dd backup INFILE BASEFILE OUTFILE +> diff-dd backup -i INFILE -b BASEFILE -o OUTFILE The ```INFILE``` is a path to the file to backup differentially, the ```BASEFILE``` is the full image, and the ```OUTFILE``` is the file to @@ -39,15 +39,15 @@ which only the changed sectors of the ```INFILE```, compared to the The restoration means application of the changed sectors saved in the ```DIFFFILE```, which is the differential image, to the ```OUTFILE```: -> diff-dd restore DIFFFILE OUTFILE +> diff-dd restore -d DIFFFILE -o OUTFILE ## Options -```-s``` sets the sector size by which the files will be processed +```-S``` sets the sector size by which the files will be processed (default is 512 B). It can be used to control granularity of differential backup. -```-b``` sets the size of the buffer for the sectors of the input and +```-B``` sets the size of the buffer for the sectors of the input and output file (default is 4 MiB). The input data is always buffered. The output data are buffered only in backup mode. @@ -59,13 +59,13 @@ First, the full image of the partition to backup has to be created: When the user decides to create the differential image, he or she runs: -> diff-dd backup /dev/sda1 full.img diff.img +> diff-dd backup -i /dev/sda1 -b full.img -o diff.img If a data accident happens, the partition can be restored by running: > dd bs=4M if=full.img of=/dev/sda1 -> diff-dd restore diff.img /dev/sda1 +> diff-dd restore -d diff.img -o /dev/sda1 The first command restores the old full image. The second one applies the differences. |