[Gluster-users] Possible to use gluster w/ email services + Tuning for fast replication

Rick King gluster at king7.com
Sun Oct 31 12:35:25 UTC 2010

Gluster ver: glusterfs-core/rdma/fuse-3.1.0-1 
OS: Centos 5.5 x86_64 (Two VMWare Nodes) 

Hello All, 

I am relatively new to gluster, I've started diving into Gluster for a couple of weeks now. I was wondering if anyone is using Gluster with an email server, e.g. postfix or sendmail. I am curious to know on how fast gluster replicates files since MTA's do a lot of IO. I'd imagine some gluster tuning involved to handle a lot files needing to be replicated. 

Right now, I am testing out a 2 node setup, with one server replicating data to another node. One thing I noticed was when I created a file or directory on the server, the new data does not replicate to the other node. The only time data is synced from server to the other node is when I run "gluster volume rebalance test start". Is this normal? I had envisioned gluster would constantly replicate changes from the server to the other nodes, am I off base? 

The commands I used to create the volume from the server (hostnameA) 

1) gluster volume create test replica 2 transport tcp hostnameA:/opt hostnameB:/opt 

2) gluster volume start test 

3) mount -t glusterfs hostnameA:/test /mnt 

My current volume info: 

Volume Name: test 
Type: Replicate 
Status: Started 
Number of Bricks: 2 
Transport-type: tcp 
Brick1: hostnameA:/opt 
Brick2: hostnameB:/opt 
Options Reconfigured: 
performance.cache-size: 6GB 

Greatly appreciate anyone has any pointers on how to improve replication. 

My best to you, 

~~Rick King 

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