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Addendum: |
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|
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To complete the list. Here the parallel implementation of "lzip": |
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|
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"plzip": https://www.nongnu.org/lzip/plzip.html |
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|
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-Ramon |
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|
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On 26/09/2021 14:23, Ramon Fischer wrote: |
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> In addition to this, you may want to use the parallel implementations |
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> of "gzip", "xz", "bzip2" or the new "zstd" (zstandard), which are |
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> "pigz"[1], "pixz"[2], "pbzip2"[3], or "zstmt" (within package |
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> "app-arch/zstd")[4] in order to increase performance: |
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> |
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> $ cd <path_to_mounted_backup_partition> |
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> $ for tar_archive in *.tar; do pixz "${tar_archive}"; done |
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> |
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> -Ramon |
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> |
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> [1] |
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> * https://www.zlib.net/pigz/ |
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> |
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> [2] |
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> * https://github.com/vasi/pixz |
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> |
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> [3] |
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> * https://launchpad.net/pbzip2 |
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> * http://compression.ca/pbzip2/ |
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> |
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> [4] |
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> * https://facebook.github.io/zstd/ |
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> |
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> |
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> On 26/09/2021 13:36, Simon Thelen wrote: |
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>> [2021-09-26 11:57] Peter Humphrey <peter@××××××××××××.uk> |
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>>> part text/plain 382 |
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>>> Hello list, |
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>> Hi, |
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>> |
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>>> I have an external USB-3 drive with various system backups. There |
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>>> are 350 .tar |
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>>> files (not .tar.gz etc.), amounting to 2.5TB. I was sure I wouldn't |
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>>> need to |
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>>> compress them, so I didn't, but now I think I'm going to have to. Is |
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>>> there a |
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>>> reasonably efficient way to do this? I have 500GB spare space on |
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>>> /dev/sda, and |
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>>> the machine runs constantly. |
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>> Pick your favorite of gzip, bzip2, xz or lzip (I recommend lzip) and |
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>> then: |
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>> mount USB-3 /mnt; cd /mnt; lzip * |
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>> |
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>> The archiver you chose will compress the file and add the appropriate |
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>> extension all on its own and tar will use that (and the file magic) to |
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>> find the appropriate decompresser when you want to extract files later |
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>> (you can use `tar tf' to test if you want). |
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>> |
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>> -- |
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>> Simon Thelen |
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>> |
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> |
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|
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-- |
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GPG public key: 5983 98DA 5F4D A464 38FD CF87 155B E264 13E6 99BF |