Hi, I have done a setup(see my setup below) on multi site datacenter with gluster and currently it doesn't work properly but there is some workaround. The main problem is that replication is synchronous and there is currently no way to turn it in async mod. I've done some test (iozone,tar,bonnie++,script...) and performance is poor with small files especially. We are using an url to access servers : glusterfs.cluster.inetcompany.com This url is in DNS GSLB(geo DNS)+RR (Round Robin) It means that client from datacenter 1 will always be binded randomly on storage node from his Datacenter. They use this command for mounting the filesystem : mount -t glusterfs glusterfs.cluster.inetcompany.com:/venus /users/glusterfs_mnt
If one node fails , it is remove from de list of the DNS, client do a new DNS query and he is binded on active node of his Datacenter. You could use Wan accelerator also. We currently are in intra site mode and we are waiting for Async replication feature expected in version 3.2. It should come soon. Volume Name: venus Type: Distributed-Replicate Status: Started Number of Bricks: 2 x 4 = 8 Transport-type: tcp Bricks: Brick1: serv1:/users/exp1 \ Brick2: serv2:/users/exp2 > Réplica pool 1 \ Brick3: serv3:/users/exp3 / \ Brick4: serv4:/users/exp4 =Envoyer>Distribution Brick5: serv5:/users/exp5 \ / Brick6: serv6:/users/exp6 > Réplica pool 2 / Brick7: serv7:/users/exp7 / Brick8: serv8:/users/exp8 Datacenter 1 : Brick 1,2,5,6 Datacenter 2 : Brick 3,4,7,8 Distance between Datacenters : 500km Latency between Datacenters : 11ms Datarate between Datacenters : ~100Mb/s Regards, Anthony >Message: 3 >Date: Wed, 9 Mar 2011 16:44:27 -0800 >From: Mohit Anchlia <[email protected]> >Subject: [Gluster-users] How to use gluster for WAN/Data Center > replication >To: [email protected] >Message-ID: > <[email protected]> >Content-Type: text/plain; charset=ISO-8859-1 > >How to setup gluster for WAN/Data Center replication? Are there others >using it this way? > >Also, how to make the writes asynchronuous for data center replication? > >We have a requirement to replicate data to other data center as well. >
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