Hello all,
I've configured 4 bricks over a GigE network, however I'm getting very slow
performance for writing to my gluster share.
Just set this up this week, and here's what I'm seeing:
[root at vm-container-0-0 ~]# gluster --version | head -1
glusterfs 3.2.2 built on Jul 14 2011 13:34:25
[root at vm-container-0-0 pifs]# gluster volume info
Volume Name: pifs
Type: Distributed-Replicate
Status: Started
Number of Bricks: 2 x 2 = 4
Transport-type: tcp
Bricks:
Brick1: vm-container-0-0:/gluster
Brick2: vm-container-0-1:/gluster
Brick3: vm-container-0-2:/gluster
Brick4: vm-container-0-3:/gluster
The 4 systems, are each storage bricks and storage clients, mounting gluster
like so:
[root at vm-container-0-1 ~]# df -h /pifs/
Filesystem Size Used Avail Use% Mounted on
glusterfs#127.0.0.1:pifs
1.8T 848M 1.7T 1% /pifs
iperf show's network through put looking good:
[root at vm-container-0-0 pifs]# iperf -c vm-container-0-1
------------------------------------------------------------
Client connecting to vm-container-0-1, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[ 3] local 10.19.127.254 port 53441 connected with 10.19.127.253 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 1.10 GBytes 941 Mbits/sec
Then, writing to the local disk is pretty fast:
[root at vm-container-0-0 pifs]# dd if=/dev/zero of=/root/dd_test.img bs=1M
count=2000
2000+0 records in
2000+0 records out
2097152000 bytes (2.1 GB) copied, 4.8066 seconds, 436 MB/s
However, writes to the gluster share, are abysmally slow:
[root at vm-container-0-0 pifs]# dd if=/dev/zero of=/pifs/dd_test.img bs=1M
count=2000
2000+0 records in
2000+0 records out
2097152000 bytes (2.1 GB) copied, 241.866 seconds, 8.7 MB/s
Other than the fact that it's quite slow, it seems to be very stable.
iozone testing shows about the same results.
Any help troubleshooting would be much appreciated. Thanks!
--joey
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