- COMPRESS DATA AND RECOMPRESS IT TO ITS ORIGINAL STATE HOW TO
- COMPRESS DATA AND RECOMPRESS IT TO ITS ORIGINAL STATE ARCHIVE
- COMPRESS DATA AND RECOMPRESS IT TO ITS ORIGINAL STATE FULL
- COMPRESS DATA AND RECOMPRESS IT TO ITS ORIGINAL STATE ZIP
- COMPRESS DATA AND RECOMPRESS IT TO ITS ORIGINAL STATE WINDOWS
It's pretty possible, you already know it. Let's consider this unpacked contents "the same data".
COMPRESS DATA AND RECOMPRESS IT TO ITS ORIGINAL STATE ARCHIVE
Let's say you have two different compressed archive files, after unpacking they both return files, which compare to identity. You somewhat miss the meaning of the word "same" and don't understand what exactly you compare and hash. Is this possible? do i need to 'fake' the modification timestamps? how do i determine what options were used? I want to decompress a file and then reproduce the same hash/checksum by compressing it again using the same version of gzip/bzip2 that was used to compress it, along with the same options/method. The problem with decompressing the files for backup means i lose the hash/checksum stored on the original dump site. i'm considering keeping two extra duplicates for this purpose and still using 7-zip. I suspect that recompressing a year's worth of dumps would result in significantly higher compression as a solid archive, since it should only store the changes (or would it?) but for data integrity sake, this would probably be a bad idea without redundancy data, that 7-zip doesn't seem to support. I've found that when i decompress the contents of a monthly database of simplewiki and recompress it using 7-zip, i end up with a 3% compression ratio. The problem is disk space, time is not so much an issue. Even after performing such benchmarks and seeing good results in an artificial situation, you might see slowdowns if your CPU is busy and you need to read or write files.I want to duplicate the entire contents of wikimedia's dumps, monthly, and upload them to amazon glacier and/or tape backup and/or a third backup medium that can survive corporation collapse/electromagnetic pulse (if it will one day exist).
You won’t actually know how much space you’ll save and how the performance is different unless you actually enable the option and benchmark it on your files and hardware.
COMPRESS DATA AND RECOMPRESS IT TO ITS ORIGINAL STATE HOW TO
RELATED: How to Stress Test the Hard Drives in Your PC or Server This option can be enabled on USB flash drives and other external hard drives to save a bit of space, but–again–getting a larger drive is probably a better solution. This could slow file access times down in some cases. Plus, even if you have a computer with a fast CPU, your computer’s CPU may be busy when it comes time to read or write files. A larger drive will give you much more space than enabling compression would, anyway, and usually pretty cheaply. But if you’re buying or building a speedy computer, you’re probably better off buying a larger drive–or a secondary drive–so you can store more files without having to compress them. Your CPU can keep up with the compression. If you have a computer with a faster CPU, you can probably enable this option fairly safely. But that slower CPU means enabling compression will tax your system and slow things down.
COMPRESS DATA AND RECOMPRESS IT TO ITS ORIGINAL STATE WINDOWS
That’s unfortunate because a cheap Windows notebook or tablet will often have a small amount of storage, making this option tempting. This is especially true on slow laptops and tablets. If you have a computer with a slower CPU, you should probably avoid this option. The exact space savings will depend on your drive and the files on it. In 2011, Tom’s Hardware did a benchmark and found that enabling NTFS compression for a Windows system drive shrunk the drive from an original size of 70.9 GB to a compressed size of 58.4 GB, for a 17.6% space savings.
COMPRESS DATA AND RECOMPRESS IT TO ITS ORIGINAL STATE ZIP
zip files, too, of course.)īut the NTFS compression algorithm is optimized to be more speedy and lightweight, so it compresses less than similar file compression algorithms. (You’d see similar huge space savings by compressing those.
COMPRESS DATA AND RECOMPRESS IT TO ITS ORIGINAL STATE FULL
On the other hand, if you compress a drive full of text files (.txt files), you’ll likely see huge space savings. zip files are already compressed files and the additional compression won’t do much.
For example, if you compress a drive full of. If the drive contains files that are already compressed or just don’t compress well, you won’t save much space.
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