diff options
| author | Prashanth Pai <ppai@redhat.com> | 2012-03-26 14:33:41 +0530 |
|---|---|---|
| committer | Vijay Bellur <vbellur@redhat.com> | 2013-11-11 19:35:01 -0800 |
| commit | b18257183d137c7ea8a76b4d57812fe26d9ea850 (patch) | |
| tree | 2f50aa44455255afb3f43b18b9a0066331e25cc1 /xlators/features/compress/src/cdc-mem-types.h | |
| parent | 27935ee84c484fff3d8d29218c197812701957ed (diff) | |
features/compress: Compression/DeCompression translator
* 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 :
<compressed-data> + 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 <vol_name> compress on
Configurable options:
gluster volume set <vol_name> compress.compression-level 8
gluster volume set <vol_name> compress.min-size 50
Change-Id: Ib7a66b6f1f70fe002b7c513588cdf75c69370805
BUG: 923540
Original-author : Venky Shankar <vshankar@redhat.com>
Signed-off-by: Venky Shankar <vshankar@redhat.com>
Signed-off-by: Prashanth Pai <nullpai@gmail.com>
Signed-off-by: Prashanth Pai <ppai@redhat.com>
Reviewed-on: http://review.gluster.org/3251
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
Diffstat (limited to 'xlators/features/compress/src/cdc-mem-types.h')
| -rw-r--r-- | xlators/features/compress/src/cdc-mem-types.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/xlators/features/compress/src/cdc-mem-types.h b/xlators/features/compress/src/cdc-mem-types.h new file mode 100644 index 000000000..efa008059 --- /dev/null +++ b/xlators/features/compress/src/cdc-mem-types.h @@ -0,0 +1,22 @@ +/* + Copyright (c) 2013 Red Hat, Inc. <http://www.redhat.com> + This file is part of GlusterFS. + + This file is licensed to you under your choice of the GNU Lesser + General Public License, version 3 or any later version (LGPLv3 or + later), or the GNU General Public License, version 2 (GPLv2), in all + cases as published by the Free Software Foundation. +*/ + +#ifndef __CDC_MEM_TYPES_H +#define __CDC_MEM_TYPES_H + +#include "mem-types.h" + +enum gf_cdc_mem_types { + gf_cdc_mt_priv_t = gf_common_mt_end + 1, + gf_cdc_mt_vec_t = gf_common_mt_end + 2, + gf_cdc_mt_gzip_trailer_t = gf_common_mt_end + 3, +}; + +#endif |