diff options
| author | Xavier Hernandez <xhernandez@datalab.es> | 2014-09-18 16:50:47 +0200 |
|---|---|---|
| committer | Vijay Bellur <vbellur@redhat.com> | 2014-09-23 09:12:32 -0700 |
| commit | 5f79d6e08fbb930aa67dd59eb39cbece6f138b59 (patch) | |
| tree | e647841e8b8423ef097f529d7cbdf7f11de0aafa /xlators/cluster/ec/src/ec-common.h | |
| parent | 933e5bd5a7b32394c7a3c6e84543dc48ed24a732 (diff) | |
ec: Add config information in an xattr
To simplify backward compatibility of the ec xlator when some
parameter or the implementation itself is changed, a new xattr
is added to each file with the configuration needed to recover
it.
The new attribute is called 'trusted.ec.config', and it's a 64-bit
value containing the following information:
8 bits: version of the config information (currently always 0)
8 bits: algorithm used to encode the file (currently always 0)
8 bits: size of the galois field (currently always 8)
8 bits: number of bricks
8 bits: redundancy
24 bits: chunk size (currently 512)
This new xattr could allow, in a future version, to have different
configurations per file.
Change-Id: I8c12d40ff546cc201fc66caa367484be3d48aeb4
BUG: 1140861
Signed-off-by: Xavier Hernandez <xhernandez@datalab.es>
Reviewed-on: http://review.gluster.org/8770
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Dan Lambright <dlambrig@redhat.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
Diffstat (limited to 'xlators/cluster/ec/src/ec-common.h')
| -rw-r--r-- | xlators/cluster/ec/src/ec-common.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/xlators/cluster/ec/src/ec-common.h b/xlators/cluster/ec/src/ec-common.h index 4fc89fdde33..79263e2d884 100644 --- a/xlators/cluster/ec/src/ec-common.h +++ b/xlators/cluster/ec/src/ec-common.h @@ -25,6 +25,10 @@ #include "ec-data.h" +#define EC_CONFIG_VERSION 0 + +#define EC_CONFIG_ALGORITHM 0 + #define EC_FLAG_UPDATE_LOC_PARENT 0x0001 #define EC_FLAG_UPDATE_LOC_INODE 0x0002 #define EC_FLAG_UPDATE_FD 0x0004 |