06-03-2011
gzip vs pipe gzip: produce different file size
Hi All,
I have a random test file: test.txt, size: 146
$ ll test.txt
$ 146 test.txt
Take 1:
$ cat test.txt | gzip > test.txt.gz
$ ll test.txt.gz
$ 124 test.txt.gz
Take 2:
$ gzip test.txt
$ ll test.txt.gz
$ 133 test.txt.gz
As you can see, gzipping a file and piping into gzip produce different sized *gz files. The problem currently is that some archivers, such as WinZip and Cygwin's gunzip have to unzip the piped gzip file twice before it can be read as a plain text file. Why is this and how can I ensure piping into gzip produces the same file as gzipping a file?
Thanks,
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mongofiles
MONGOFILES(1) Mongo Database MONGOFILES(1)
NAME
mongofiles - a simple GridFS interface
SYNOPSIS
mongofiles [OPTIONS]
DESCRIPTION
mongofiles is used to list, get, and insert files in the database.
EXAMPLES
mongofiles list
lists files in test.fs.files
mongofiles put README.txt
inserts the file README.txt into the collection test.fs.files
mongofiles get photo.jpg
retrieves photo.jpg from test.fs.files and saves it locally
OPTIONS
--help show usage information
-h, --host HOST
mongo host to which to connect
-d, --db DB
database to use (default DB=test)
-c, --collection COLLECTION (default COLLECTION=fs.files)
collection to use
--command [list|search|put|get]
execute a command
--file FILE
filename for get or put
list list all files. takes an optional filename. the file has to start with the filename
search search all files for something that contains the string
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SEE ALSO
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AUTHOR
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10gen June 2009 MONGOFILES(1)