Thanks for the info! I am assuming it's a manual process to remove nodes from the DNS? If I am not wrong I think load balancing by default occurs for native gfs client that you are using. Initial mount is required only to read volfile. How do you ensure that a copy of file in one site definitely is saved on other site as well? On Thu, Mar 10, 2011 at 1:11 AM, anthony garnier <sokar6012 at hotmail.com> wrote: > 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 > R?plica pool 1 \ > Brick3: serv3:/users/exp3 / \ > Brick4: serv4:/users/exp4 =Envoyer>Distribution > Brick5: serv5:/users/exp5 \ / > Brick6: serv6:/users/exp6 > R?plica 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 <mohitanchlia at gmail.com> >>Subject: How to use gluster for WAN/Data Center >> replication >>To: gluster-users at gluster.org >>Message-ID: >> <AANLkTi=dkK=zX0QdCfnKeLJ5nkF1dF3+g1hxDzFZNvwx at mail.gmail.com> >>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.
