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William Kenworthy wrote |
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> This is what I currently use: But I dont have room for two archives, and |
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> this method doesnt keep versions. Trying to keep incrementals using |
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> this has proven to be a disaster. |
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Even though Squashfs is read-only (and so is tar, cpio etc.), you can append |
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to pre-existing Squashfs filesystems without needing to decompress and then |
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recompress the filesystem. Because Squashfs detects duplicates, and renames |
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duplicated files (in the top level directory) at appending, this supports |
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simple incremental versioning. |
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For example, you could archive directory "data", delete it, and later add |
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directories "a" and "b" to the archive without needing the disk space to |
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decompress directory "data". |
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If you kept the "data" directory, and later added new files to it, or |
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modified files, adding the "data" directory to the Squashfs archive a second |
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time would create two directories "data", the first version, and "data_1" |
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the second version. Only files that have been added or have changed in the |
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data directory will be added to the Squashfs archive, the other files |
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(presumably the bulk) will be be detected as duplicates and not added. |
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Phillip Lougher |
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View this message in context: http://www.nabble.com/What-can-I-use-for-a-compressed-file-system--t1604870.html#a4362944 |
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Sent from the gentoo-user forum at Nabble.com. |
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