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#1
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"7-Zip" V9.20 Recently Downloaded
Hi,
Yesterday I downloaded "7-Zip" V9.20 ("7z920.exe") after a friend recommended it. One of my laptops (Dell) has Windows 7. WinZip 7 (I used for years) will not install. So far, I have used 7-Zip once to unzip a .ZIP file and I had no problems. Note: 7-Zip is free. Has anyone had any issues using this file(s) compressor? Thank You in advance, John |
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#2
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"7-Zip" V9.20 Recently Downloaded
Hi,
Yesterday I downloaded "7-Zip" V9.20 ("7z920.exe") after a friend recommended it. One of my laptops (Dell) has Windows 7. WinZip 7 (I used for years) will not install. So far, I have used 7-Zip once to unzip a .ZIP file and I had no problems. Note: 7-Zip is free. Has anyone had any issues using this file(s) compressor? Thank You in advance, John None at all, I dumped WinZip and WinRAR long ago. -- mick |
#3
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"7-Zip" V9.20 Recently Downloaded
mick wrote:
Hi, Yesterday I downloaded "7-Zip" V9.20 ("7z920.exe") after a friend recommended it. One of my laptops (Dell) has Windows 7. WinZip 7 (I used for years) will not install. So far, I have used 7-Zip once to unzip a .ZIP file and I had no problems. Note: 7-Zip is free. Has anyone had any issues using this file(s) compressor? Thank You in advance, John None at all, I dumped WinZip and WinRAR long ago. Same here, although I keep WinRAR around because on some files it produces a smaller archive. 7-zip is very stable; even the alpha versions tend to have few (if any) issues. -- You went over my helmet?! |
#5
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"7-Zip" V9.20 Recently Downloaded
wrote:
Hi, Yesterday I downloaded "7-Zip" V9.20 ("7z920.exe") after a friend recommended it. One of my laptops (Dell) has Windows 7. WinZip 7 (I used for years) will not install. So far, I have used 7-Zip once to unzip a .ZIP file and I had no problems. Note: 7-Zip is free. Has anyone had any issues using this file(s) compressor? Thank You in advance, John Works fine here. Have it installed on several Windows installs. There is also a version for Linux. ******* For me, the best part of it, is the ability to read and traverse various archive formats. That's what I use it for mostly. So I do more "decompression" work with it than "compression" work. On the decompression side, it doesn't recognize the 20 or 30 different "packers" available for executable code, but otherwise it does a pretty impressive job of letting you look inside an archive. Anti virus applications, have to know how to unpack all of those. An example of a packer would be UPX. http://en.wikipedia.org/wiki/Upx ******* This would be for the compression side. The only thing a bit weird about 7Zip, is the uneven usage of multiple cores. There are cases where I think it could benefit from multiple cores, where the author of the program doesn't want to put the effort into making it work better. But considering the author offers it for free, well, you can't complain too much. I can't blame him for putting more effort into the .7z flavor. The .7z format provides excellent compression, but with a heavy computational price. It's not something that "better C coding" would fix :-) It's the nature of the algorithm used. If you want to reduce entropy, you have to work to get it. For space-time tradeoffs, I like GZip. GZip isn't the absolutely fastest compressor, but it's in the middle of the pack here. Some of the ones that are faster, may have uneven performance depending on the type of data you're feeding them. My favorite might be GZip running with a compression level of 3 (on its scale of 1..9). (And no, I wasn't as methodical as this person, and test all nine settings. I selected three and went with it. Maybe four is better?) http://www.linuxjournal.com/article/8051 In terms of fastest GZip implementation, that would be the multi-core PIGZ. (7Zip only uses one core for GZip compression.) http://www.zlib.net/pigz/ There is a Windows port of PIGZ here. The problem I have with this version, going by memory, was later, when probing to see what size the files are in the archive, it doesn't seem to handle things larger than 4GB properly. So if I need "good quality" archives, I might flip over to the Linux version and do the compression there. It's the header information in the archive that may be a bit suspect with the Windows version. (I recommend testing if you have any questions. I didn't keep good notes of the differences or anything.) http://web.archive.org/web/201001070...downloads.html http://web.archive.org/web/201107231...-software.html It's a fun topic, especially when you're trying to trim down some 500GB archive files. That's when the differences matter. I think if I went with the .7z format as an option, it was threatening to take all week (7 days). I've never had any issues with the headers of the archives made with 7Zip. So in terms of "quality", no issues there. It was just the PIGZ program, where you have to compare the Linux and Windows version, to figure out which one is better. Paul |
#6
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"7-Zip" V9.20 Recently Downloaded
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#7
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"7-Zip" V9.20 Recently Downloaded
On 11/06/2013 13:50, Tim Slattery wrote:
wrote: Hi, Yesterday I downloaded "7-Zip" V9.20 ("7z920.exe") after a friend recommended it. One of my laptops (Dell) has Windows 7. WinZip 7 (I used for years) will not install. So far, I have used 7-Zip once to unzip a .ZIP file and I had no problems. Note: 7-Zip is free. Has anyone had any issues using this file(s) compressor? On the contrary, it's absolutely first rate. Some time ago my employer got fed up with Winzip. So they were dropped and we now use 7-zip instead. Of course, most of the time you can use the built-in abilities of Win7. But 7-zip adds some things, not least among them a very good command-line interface. Same here, it's been the default for our 25000+ users for well over a year now. -- Rob |
#8
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"7-Zip" V9.20 Recently Downloaded
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#9
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"7-Zip" V9.20 Recently Downloaded
On Tue, 11 Jun 2013 06:51:12 -0700, The Other Guy wrote:
I use WinRAR much of the time, but have 7-zip 9.30 beta installed and use it for some things, and have no problems at all with it. There is no 7-Zip 9.30 beta. There's 9.20, 9.22 beta, 9.25 alpha and 9.30 alpha. -- s|b |
#10
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"7-Zip" V9.20 Recently Downloaded
On Tue, 11 Jun 2013 13:46:30 -0700, The Other Guy wrote:
On Tue, 11 Jun 2013 20:08:39 +0200, "s|b" wrote: On Tue, 11 Jun 2013 06:51:12 -0700, The Other Guy wrote: I use WinRAR much of the time, but have 7-zip 9.30 beta installed and use it for some things, and have no problems at all with it. There is no 7-Zip 9.30 beta. There's 9.20, 9.22 beta, 9.25 alpha and 9.30 alpha. Odd, because that IS what the 'about' tab says it is. To reply by email, lose the Ks... That is not, however, what the download link says it is. We could compromise and call it aleph-beth :-) -- Gene E. Bloch (Stumbling Bloch) |
#11
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"7-Zip" V9.20 Recently Downloaded
On Tue, 11 Jun 2013 13:46:30 -0700, The Other Guy wrote:
I use WinRAR much of the time, but have 7-zip 9.30 beta installed and use it for some things, and have no problems at all with it. There is no 7-Zip 9.30 beta. There's 9.20, 9.22 beta, 9.25 alpha and 9.30 alpha. Odd, because that IS what the 'about' tab says it is. Mine clearly says 'alpha': http://img541.imageshack.us/img541/9229/7zip930alpha.png There's no mention of '9.30 beta' on their website: http://www.7-zip.org/ -- s|b |
#12
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"7-Zip" V9.20 Recently Downloaded
On Tue, 11 Jun 2013 20:05:36 +0200, "s|b" wrote:
Has anyone had any issues using this file(s) compressor? I've been using it for years with problems. You don't have to worry "with problems" ?? I'm sure you mean without problems. |
#13
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"7-Zip" V9.20 Recently Downloaded
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#14
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"7-Zip" V9.20 Recently Downloaded
On 11/06/2013 14:16, mick wrote:
Hi, Yesterday I downloaded "7-Zip" V9.20 ("7z920.exe") after a friend recommended it. One of my laptops (Dell) has Windows 7. WinZip 7 (I used for years) will not install. So far, I have used 7-Zip once to unzip a .ZIP file and I had no problems. Note: 7-Zip is free. Has anyone had any issues using this file(s) compressor? Thank You in advance, John None at all, I dumped WinZip and WinRAR long ago. Is 7-Zip remarkably better that Winzip and Winrar? I own both. Fokke |
#15
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"7-Zip" V9.20 Recently Downloaded
On 11/06/2013 14:16, mick wrote:
Hi, Yesterday I downloaded "7-Zip" V9.20 ("7z920.exe") after a friend recommended it. One of my laptops (Dell) has Windows 7. WinZip 7 (I used for years) will not install. So far, I have used 7-Zip once to unzip a .ZIP file and I had no problems. Note: 7-Zip is free. Has anyone had any issues using this file(s) compressor? Thank You in advance, John None at all, I dumped WinZip and WinRAR long ago. Is 7-Zip remarkably better that Winzip and Winrar? I own both. Fokke I would not say 'remarkably', but it is free. :-) There is a pretty good summary he http://www.tomshardware.com/reviews/...crar,3436.html -- mick |
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