[Gluster-users] New cluster - first experience

Gandalf Corvotempesta
Wed, 13 Jul 2016 11:17:14 -0000

2016-07-13 10:24 GMT+02:00 Pranith Kumar Karampuri <pkarampu at
redhat.com>:
> We are in the process of making shard available for general purpose
> usecases.

Any ETA?

Anyway, i did another test. This time the "client" has 4 bonded
gigabit nic (balance-rr) and each server has 2 bonded gigabit nic
(balance-rr). (previously i had an issue with bonding on our switch)

With sharding (64MB):
# echo 3 > /proc/sys/vm/drop_caches; dd if=/dev/zero of=test bs=1M
count=1000 conv=fsync
1000+0 record dentro
1000+0 record fuori
1048576000 byte (1,0 GB) copiati, 89,2066 s, 11,8 MB/s


Without sharding:
# echo 3 > /proc/sys/vm/drop_caches; dd if=/dev/zero of=test bs=1M
count=1000 conv=fsync
1000+0 record dentro
1000+0 record fuori
1048576000 byte (1,0 GB) copiati, 17,759 s, 59,0 MB/s

WOW! But still far away from HDD speed (about 120MB/s)


With 4 bonded nic, I have 4000gbit of bandwidth.
4000/8 = 500MB/s
With this configuration gluster should be able to write at full speed
on 3 nodes at once.
Each node has 2000/8 = 250MB/s of bandwidth, twice the hdd speed.