Sparse files - Historie editací

Chronos: /* Copy over network */

2023-09-24T11:50:19Z

Copy over network

← Starší verze		Verze z 24. 9. 2023, 13:50
Řádek 26:		Řádek 26:

	Without compression all data are transferred over network even the file is sparse.		Without compression all data are transferred over network even the file is sparse.
	<source lang="bash">rsync -aS file user@host:/dir</source>		<source lang="bash">rsync -aS --progress file user@host:/dir</source>

	With compression speed depends more on CPU performance as all data needs to be compressed. Sparse space is well compressed and transferred data greatly reduced. The data which can't be well compressed are transferred slower than without compression.		With compression speed depends more on CPU performance as all data needs to be compressed. Sparse space is well compressed and transferred data greatly reduced. The data which can't be well compressed are transferred slower than without compression.
	<source lang="bash">rsync -aSz file user@host:/dir</source>		<source lang="bash">rsync -aSz --progress file user@host:/dir</source>

	==Reclaim space on ext4 image==		==Reclaim space on ext4 image==

Chronos: /* Copy over network */

2023-09-24T11:18:20Z

Copy over network

← Starší verze		Verze z 24. 9. 2023, 13:18
Řádek 25:		Řádek 25:
	===rsync===		===rsync===

			Without compression all data are transferred over network even the file is sparse.
	<source lang="bash">rsync -aS file user@host:/dir</source>		<source lang="bash">rsync -aS file user@host:/dir</source>

			With compression speed depends more on CPU performance as all data needs to be compressed. Sparse space is well compressed and transferred data greatly reduced. The data which can't be well compressed are transferred slower than without compression.
			<source lang="bash">rsync -aSz file user@host:/dir</source>

	==Reclaim space on ext4 image==		==Reclaim space on ext4 image==

Chronos v 31. 8. 2022, 11:54

2022-08-31T11:54:14Z

← Starší verze		Verze z 31. 8. 2022, 13:54
Řádek 5:		Řádek 5:
	==Copy locally==		==Copy locally==

			===cp===
	<source lang="bash">cp from to</source>		<source lang="bash">cp from to</source>

			===dd===
			<source lang="bash">dd if=srcFile of=dstFile iflag=direct oflag=direct bs=64K conv=sparse</source>

	==Show real size==		==Show real size==

Chronos v 11. 8. 2022, 21:28

2022-08-11T21:28:01Z

← Starší verze		Verze z 11. 8. 2022, 23:28
Řádek 1:		Řádek 1:
	==Create sparse file==		==Create sparse file==

	truncate -s 10G ./file		<source lang="bash">truncate -s 10G ./file</source>

	==Copy locally==		==Copy locally==

	cp from to		<source lang="bash">cp from to</source>

	==Show real size==		==Show real size==
Řádek 11:		Řádek 11:
	===ls===		===ls===
	Show real size and logical file size:		Show real size and logical file size:
	ls -lhs file		<source lang="bash">ls -lhs file</source>

	===du===		===du===
	Show real file size:		Show real file size:
	du -sh file		<source lang="bash">du -sh file</source>

	==Copy over network==		==Copy over network==
Řádek 21:		Řádek 21:
	===rsync===		===rsync===

	rsync -aS file user@host:/dir		<source lang="bash">rsync -aS file user@host:/dir</source>

			==Reclaim space on ext4 image==

			Mount old image as loopback device:
			<source lang="bash">mount old.raw /mnt/old</source>

			Get size of the file:
			<source lang="bash">ls -l old.raw</source>

			Create second sparse image file with the same size:
			<source lang="bash">truncate -s <size> new.raw</source>

			Format it with ext4 file system:
			<source lang="bash">mkfs.ext4 new.raw</source>

			Mount new image as loopback device:
			<source lang="bash">mount new.raw /mnt/new</source>

			Synchronize entire disk:
			<source lang="bash">rsync -aSAXv /mnt/old/ /mnt/new</source>

			Unmount disks:
			<source lang="bash">umount /mnt/old
			umount /mnt/new</source>

	=External links=		=External links=

Chronos v 6. 8. 2022, 11:45

2022-08-06T11:45:42Z

← Starší verze		Verze z 6. 8. 2022, 13:45
Řádek 1:		Řádek 1:
	Create sparse file:		==Create sparse file==
⚫	truncate -s 10G ./file

		⚫	truncate -s 10G ./file

			==Copy locally==

			cp from to

			==Show real size==

			===ls===
	Show real size and logical file size:		Show real size and logical file size:
	ls -lhs file		ls -lhs file

			===du===
	Show real file size:		Show real file size:
	du -sh file		du -sh file

Chronos v 5. 6. 2020, 21:22

2020-06-05T21:22:33Z

← Starší verze		Verze z 5. 6. 2020, 23:22
Řádek 1:		Řádek 1:
			Create sparse file:
⚫	Show file size:
	ls -lh file		truncate -s 10G ./file

	Show ~~file~~ real size:		Show real size and logical file size:
			ls -lhs file

		⚫	Show real file size:
	du -sh file		du -sh file

Chronos: Založena nová stránka s textem „Show file size: ls -lh file Show file real size: du -sh file ==Copy over network== ===rsync=== rsync -aS file user@host:/dir =External links= * [h…“

2020-06-05T20:35:49Z

Založena nová stránka s textem „Show file size: ls -lh file Show file real size: du -sh file ==Copy over network== ===rsync=== rsync -aS file user@host:/dir =External links= * [h…“

Nová stránka

Show file size:
ls -lh file

Show file real size:
du -sh file

==Copy over network==

===rsync===

rsync -aS file user@host:/dir

=External links=

* [https://wiki.archlinux.org/index.php/Sparse_file Sparse file on Archlinux wiki]

[[Category:Linux]]