"7-Zip" V9.20 Recently Downloaded


J

jaugustine

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
 
Ad

Advertisements

M

mick

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.
 
A

Auric__

mick said:
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.
 
T

Tim Slattery

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.
 
P

Paul

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/20100107...r.net/index.php/my-software/58-downloads.html
http://web.archive.org/web/20110723181540/http://www.leszer.net/index.php/my-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
 
C

Carpe_Diem

Op 11/06/2013 13:46, (e-mail address removed) schreef:
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
No problem here. I use it for ages...
 
Ad

Advertisements

T

The Other Guy

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
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.





To reply by email, lose the Ks...
 
R

Rob

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.
 
S

s|b

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?
I've been using it for years with problems. You don't have to worry
about beta or even alpha versions. They work fine as well. I've been
using 7-Zip 9.30 alpha for some time now.
 
S

s|b

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.
 
T

The Other Guy

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...
 
Ad

Advertisements

G

Gene E. Bloch

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 :)
 
O

OldGuy

(e-mail address removed) explained :
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
Just a heads up. The companion 7za.exe has a few problems related to
using an external file list to zip. It sometimes hangs. But most
people do not use 7za.exe.
 
Ad

Advertisements

Ad

Advertisements

R

Robin Bignall

Thanks. This makes sense.
Gonna try 7-Zip as well.
7-Zip doesn't appear to have a 'check for updates' button in its Help,
which would aid greatly the ability to always have the latest version.
 

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.

Ask a Question

Top