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Questions tagged [gzip]

Gzip is any of several software applications used for file compression and decompression. The term usually refers to the GNU Project's implementation, "gzip" standing for GNU zip. It is based on the DEFLATE algorithm, which is a combination of Lempel-Ziv (LZ77) and Huffman coding.

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595 views

`mod_deflate` is returning `Content-Encoding: gzip`. Is that normal?

mod_deflate is configured on my Apache 2.2 web server. But my response headers are showing gzip as the Content-Encoding instead of deflate: HTTP/1.1 200 OK Date: Mon, 26 Sep 2011 22:26:11 GMT Server:...
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2answers
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Should I serve compressed PDFs?

I'd like to know if there's a general rule of thumb wheter to enable gzipping for PDF files or not. I use NGINX but I think this would be helpful for Apache users as well. Thanks.
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475 views

CRC Failed, File is broken, using php system command to tar a directory

Can anybody see a problem with the below PHP code? Or have any ideas to troubleshoot a solution as to why whenever I download the backup file.tar.gz and try to open it using 7zip on windows... that I ...
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2answers
585 views

What reasons (if any) are there to *not* enable gzip compression for your web server?

Specifically I am working with IIS7, in case there are platform specific reasons, but I am curious in general. I know gzip compression is more CPU intensive for both the server and the client, but it ...
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1answer
2k views

Turn off gzip compression for one virtual host

I'm running into a problem where I think PHP deprecation errors are causing the headers to be malformed, causing a 330 error. If I disable error reporting for E_DEPRECATION, the error disappears, so I'...
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3answers
3k views

PHP content-length header not specifying size for my forced download

I am trying to allow our users to be able to download a zip file using a php force download. I was having trouble getting the download to finish and it turned out the zip file was getting gzipped and ...
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3answers
159 views

Uncompressing gzip file

I have compressed a folder using following command: tar czvf arch.tar.gz dirname/ When I try to uncompress it using following command tar xvfz arch.tar.gz then it uncompress folder but contents of ...
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1answer
662 views

Apache deflates .xml.gz files

I noticed an error in google webmaster tools regarding a gzipped version of a sitemap. Turns out the sitemap.xml.gz file is gzipped twice: one upon creation (as it should be) and another time when ...
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2answers
23k views

gunzip: invalid compressed data--format violated

Problem definition: I transferred a tar.gz file from a Linux machine to a Windows partition.The Windows partition has mounted with the Linux server as cifs. OS : Red Hat Enterprise Linux Server ...
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2answers
18k views

How can I enable GZIP compression in Jetty?

I have a Jetty server which does not have compression enabled (I tested this here). How can I enable compression?
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1answer
4k views

Unable to decompress a .gz file on centos. gunzip: filename.tar.gz: not in gzip format

I am trying to install the latest apache ant to centos. I did as follows: wget http://ant.apache.org/bindownload.cgi/apache-ant-1.8.2-bin.tar.gz gzip -d apache-ant-1.8.2-bin.tar.gz and I get the ...
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2answers
114 views

Is it possible to store MySQL data as comressed?

Is it possible to store MySQL data compressed? Option for that in MySQL?
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1answer
2k views

Gzip Compression IIS7 with Proxy Not working

I have seen posts with GZIP compression not working on IIS7, but none seemed to help in my case. I have a proxy server that sends the request to my website on IIS7. I have the following in web.config ...
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3answers
44k views

Fastest way to extract tar.gz

Is there anyway to extract a tar.gz file faster than tar -zxvf filenamehere? We have large files, and trying to optimize the operation.
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2answers
468 views

Erratic gzip compression on IIS7.5

This is best demonstrated when we just try to request a single CSS file from our IIS server. Sometimes we get the whole uncompressed file back. We'll wait 5 seconds and refresh, then the CSS file is ...
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1answer
821 views

gzip, deflate are not showing while accessing from a proxy

We enabled gzip and deflate in our local server and it shows correctly in phpinfo like shown below HTTP_ACCEPT_ENCODING gzip,deflate,sdch We installed the same in our client's server and there was ...
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5answers
9k views

Grepping through .gz log files

Does there exist a magical shell piping which would allow easily to grep through bunch of .gz log files without needing to extract them somewhere? .gz files are Apache logs, result of log rotation. I'...
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2answers
4k views

How can I disable gzip in apache on Ubuntu 10.10?

I'm trying to figure out how to disable or uninstall gzip from my Ubuntu server. This is to support a package of buggy software that breaks when it's trying to do a crazy call to a css file (don't ...
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2answers
650 views

IIS6 wont compress js and css

So recently I configured IIS6 to compress files I now have most files compressing apart from my JavaScript and CSS files. Does anyone have an idea what maybe causing them not to be compressed. I know ...
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1answer
166 views

gzipped tar archive file paths

I am creating a tar.gz file containing some files and folders as follows: /bin/tar cfz /usr/local/backups/mybackup-${DATENAME}.tar.gz /usr/local/backups/db-${DATENAME}.sql.gz ...
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3answers
254 views

When I extract .tar.gz all of the files within the folders have the .gz suffix

I have recently begun using a VPS and am learning linux along the way. I have compressed a folder using tar, then I gzipped it and used scp to send it to my server. When I decompress using tar -zxvf ....
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4answers
14k views

how to copy & gzip files individually over ssh

I'd like to transfer a directory with uncompressed files over using ssh, gzip'ing them individually along the way. Can anyone recommend a simple oneliner to achieve this? eg. fileA.ext -> ssh/pipe ->...
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4answers
52k views

What is the best nginx compression gzip level?

I'm using nginx reverse proxy cache with gzip enabled. However, I got some problems from Android applications HTTP-requests to my Rails JSON web service. It seems when I turn off reverse proxy cache, ...
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4answers
8k views

How to manually extract a backup set made by duplicity?

I have a set of files on my webserver produced by duplicity software: duplicity-full.20110315T085334Z.vol1.difftar.gz duplicity-full.20110315T085334Z.vol2.difftar.gz duplicity-full.20110315T085334Z....
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1answer
778 views

making apache serve unzipped content from zipped files

I need to serve a bunch of gzipped MIDI files from an Apache server. The catch is that when the user requests them, the response should come back with a "audio/midi" content-type header and not a gzip ...
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3answers
2k views

gzip compression good or bad?

I have a server that currently does a lot of processing in my application and the target users are those who have a very good internet connection. The output that is sent from the server is always ...
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1answer
10k views

How do I serve pre-gzipped files with nginx so that they'll be shown as text in the browser?

I have a bunch of gzipped log files I'd like to serve with nginx. I want them to be served in such a way that they're automatically inflated by the browser. I assume that means I need nginx to send ...
13
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1answer
11k views

How to use IIS URL Rewrite with gzip compression

I've been trying to create outbound rules in IIS 7.5 on Windows 2008 R2 on a site that has static HTML pages and compression enabled. If I have any form of compression enabled (static or dynamic) I ...
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3answers
997 views

How to pre gzip static JS

my site is running IPB 3.1.4 and I want to pre-compress my .js files. I have ssh root access and need the command to gzip the js directory and the code for htaccess. My htaccess: Options -Indexes &...
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1answer
942 views

Apache inflate application/ with mod_filter

I need to prevent pdf objects from being gzipped. Really, this only needs to take place if the request is from the Mozilla browser (but since I can't get something as seemingly simple as no-gzip for ...
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2answers
5k views

I am trying gzip compression for my javascripts and css file but for css it is not working

I am trying gzip compression for my js and css files. but for css it is not working. also when i do page speed analysis using firefox page speed it asks to enable gzip compression on your server. it ...
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3answers
9k views

Attempted gzip of directory applied gzip to each file individually

I tried to gzip a directory with the following command: gzip -r /home/path/to/backups/mydirectory.gz /home/site/public_html/ I was expecting to see a .gz file show up inside ...backups containing ...
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2answers
190 views

Backup file format that enables easy access of specific files?

I need to upgrade a Server and there have to make a compressed backup of a lot of directories. The question is: Which format should I use? tar.gz, cpio? Both compression and decompression processes ...
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2answers
2k views

How to disable chunking in apache?

When using mod_deflate in Apache2, Apache will chunk gzipped content, setting the Transfer-encoding: chunked header. Is there any setting that would change Apache's default behavior, and have Apache ...
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1answer
674 views

How to get Apache (on Debian squeeze) to compress JS/CSS

I am running Debian squeeze and cannot get Apache to compress JavaScript or CSS. HTML, however, is being compressed. In the conf files in the sites-enabled dir, I've got the following: <Location /&...
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2answers
235 views

Apache isn't deflating my website home page

I have the following 3 rules at /.htaccess AddOutputFilterByType DEFLATE text/html text/plain text/css application/json AddOutputFilterByType DEFLATE text/javascript application/javascript ...
16
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3answers
12k views

How to list content from a tar file without recursion?

I've a tar (gz, bzip) file and want to see its content, but not recursively. This is: The "first level" in the file. I already know how to see content: tar -ztf file.tar.gz But it's recursive!! ...
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3answers
166 views

Ran Gzip command and broke my site, need help with reverse command

In trying to back up a website on an apache server this am I ran the following: gzip -r /var/www/httpd/vhosts/mysite.com/ mysite.gzip Trying to backup the path to the gzip file. Howvever, after ...
2
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2answers
381 views

is gunzip atomic?

I have two scripts that watch a directory (postgres warm-standby) one script copies compressed files into the directory and then uncompresses them. the other script watches for the uncompressed ...
2
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5answers
3k views

Backup MySQL database and gzip

I'm trying to get a little more usefulness out of my MySQL backups. I'm wanting to gzip my backup when it's completed from a cron job. Here's the script I have so far to do the backup. #!/bin/sh ...
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1answer
1k views

Gzip pre-compression

I'm using mod_deflate to compress my .css and .js files on the fly: <ifmodule mod_deflate.c> AddOutputFilterByType DEFLATE text/text text/html text/plain text/xml text/css application/x-...
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1answer
2k views

Apache mod_deflate enable?

I'm using the follow code in .htaccess. It works nicely in localhost, however in production server i'm having troubles with gzip compression. AddOutputFilterByType DEFLATE text/css text/html ...
2
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1answer
1k views

IIS7 is gzipping files but not serving the gzipped version

By following a number of helpful blog posts I have configured IIS to gzip my static files. I have even enabled Failed Request Tracing and filtered to the 200 status code, and I can see the successful ...
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3answers
29k views

Content-Length not sent when gzip compression enabled in Apache?

I would really appreciate some help understanding this Apache behaviour. I am communicating to PHP from an iPhone Objective-C app in application/json. Gzip compression is enabled on the server, and ...
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3answers
2k views

Help me enable gzip compression on nginx

Here's the gzip section from my current nginx.conf: gzip on; gzip_http_version 1.1; gzip_vary on; gzip_comp_level 6; gzip_proxied any; gzip_types text/plain text/html text/css application/json ...
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3answers
7k views

Faster zlib alternatives [closed]

I wonder, if there are any faster builds of zlib around with more advanced optimizations? If it's possible to optimize it using SSE instructions or Intel C++ compiller, or some trick which were ...
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1answer
9k views

How to change the HTTP GZIP Compression Level for Dynamic Content in IIS7?

I would like to change the HTTP GZIP compression level in IIS7 from 0 to 4 as mentioned in these articles: http://weblogs.asp.net/owscott/archive/2009/02/22/iis-7-compression-good-bad-how-much.aspx ...
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4answers
2k views

How to tar.gz *.php, *.txt, *.inc, *.js, *.css, *.php3 files?

I want to backup my server, but not bother with images /videos etc. how can i tar.gz all those types of files i want (basically text files)?
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2answers
3k views

Use mod_deflate or gzip for centos5+apache

I'd like to compress the JS and CSS (perhaps also html?) files that I'm sending out. I've read a lot about gzip and mod_deflate but I'm not really sure what's the best to use? I'm looking for the ...
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5answers
2k views

gunzip “No space left on device”

I have a gzipped file that Ubuntu reports is 2,119,952,848 bytes in size. When I try to gunzip on a mount with 12GB free space, I get the error "No space left on device". Here's where it gets really ...