[Gluster-users] Is anyone using sharding?

[Eivind Sarto]

I noticed that several sharding bugs relating to file size got closed
because 3.7.4 got released.  However, file sizes are still messed up in
3.7.4.  I know this is a beta feature, but you cannot even write a single
file without getting the wrong file size.

Neither buffered or direct IO works:

# dd if=/dev/zero of=/voltest/dd.buffered bs=1024k count=1024
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 1.66046 s, 647 MB/s
# dd if=/dev/zero of=/voltest/dd.direct oflag=direct bs=1024k count=1024
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 1.91092 s, 562 MB/s
root at science08:~/test# ls -l /voltest
total 2104384
-rw-r--r-- 1 root root 1075052544 Sep 14 14:31 dd.direct
-rw-r--r-- 1 root root 1074266112 Sep 14 14:18 dd.buffered

# gluster vol info voltest
Volume Name: voltest
Type: Distribute
Volume ID: 849e2d6b-faaa-43d7-b06e-3c6d3057dff3
Status: Started
Number of Bricks: 4
Transport-type: tcp
Bricks:
Brick1: sc03:/brick_ssd_0/gv
Brick2: sc04:/brick_ssd_0/gv
Brick3: sc03:/brick_ssd_1/gv
Brick4: sc04:/brick_ssd_1/gv
Options Reconfigured:
features.shard: on
performance.readdir-ahead: on
root at science03:~# gluster --version
glusterfs 3.7.4 built on Sep  1 2015 12:08:58
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