glusterfs.git/xlators/features/compress/src/cdc.c, branch release-3.12

build: do not #include "config.h" in each file

2015-05-29T12:43:17+00:00

Instead of including config.h in each file, and have the additional
config.h included from the compiler commandline (-include option).

When a .c file tests for a certain #define, and config.h was not
included, incorrect assumtions were made. With this change, it can not
happen again.

BUG: 1222319
Change-Id: I4f9097b8740b81ecfe8b218d52ca50361f74cb64
Signed-off-by: Niels de Vos 
Reviewed-on: http://review.gluster.org/10808
Tested-by: Gluster Build System 
Tested-by: NetBSD Build System
Reviewed-by: Kaleb KEITHLEY 
Reviewed-by: Pranith Kumar Karampuri

features/compress: Add mem accounting support for compress

2014-03-24T18:08:27+00:00

Change-Id: I89a7a4cd64ef65ad3bab180d66797a62b4e1e195
BUG: 923540
Signed-off-by: Pranith Kumar K 
Reviewed-on: http://review.gluster.org/7320
Tested-by: Gluster Build System 
Reviewed-by: Prashanth Pai 
Reviewed-by: Vijay Bellur

feature/compress: Validate option and enable doc

2014-02-26T17:18:35+00:00

* Validate network.compression option
* Enable descriptions of xlator configurable options
* Improve indentation in code
* Make network.compression.mode not configurable by user.
  This is similar to "iam-self-heal-daemon" option in AFR xlator.

Fixes BUGs: 1065658, 1065640, 1065655

Change-Id: I99d82b574ee0e5c8c2baf5f5d52dbf8d015d330a
BUG: 1065640
Signed-off-by: Prashanth Pai 
Reviewed-on: http://review.gluster.org/7024
Tested-by: Gluster Build System 
Reviewed-by: Vijay Bellur

features/compress: Compression/DeCompression translator

2013-11-12T03:35:01+00:00

* When a writev call occurs, the client compresses the data before
  sending it to server. On the server, compressed data is decompressed.
  Similarly, when a readv call occurs, the server compresses the data
  before sending it to client. On the client, the compressed data is
  decompressed. Thus the amount of data sent over the wire is minimized.

* Compression/Decompression is done using Zlib library.

* During normal operation, this is the format of data sent over wire :
   + trailer(8)
  The trailer contains the CRC32 checksum and length of original
  uncompressed data. This is used for validation.

HOW TO USE
----------
Turning on compression xlator:
gluster volume set  compress on

Configurable options:
gluster volume set  compress.compression-level 8
gluster volume set  compress.min-size 50

Change-Id: Ib7a66b6f1f70fe002b7c513588cdf75c69370805
BUG: 923540
Original-author : Venky Shankar 
Signed-off-by: Venky Shankar 
Signed-off-by: Prashanth Pai 
Signed-off-by: Prashanth Pai 
Reviewed-on: http://review.gluster.org/3251
Tested-by: Gluster Build System 
Reviewed-by: Vijay Bellur