Thanks, Would you also explain about my 2nd question ? let say hostB mounted glusterFS partition by using backup vol (e.g. hostB) and after some time Host A come online, will GlusterFS client (mount) automatically switch to Host A ?
Thanks, ~Rohit On Thu, May 18, 2017 at 9:43 AM, knarra <kna...@redhat.com> wrote: > Hi, > > backup-volfile-servers is mainly used to avoid SPOF. For example take > a scenario where you have Host A and Host B and when you try to mount a > glusterfs volume using Host A with backup-volfile-servers specified, if > Host A is not accessible, mount will happen with Host B which is specified > in backup-volfile-server. backup-volfile-servers are mainly used to fetch > the volfile from gluster and has nothing to do with data sync. > > data syncing comes as part of replicate feature in glusterfs where say > for example, you have two Hosts Host A and Host B with replica volume > configured, if Host A goes down for sometime, all the writes happens on > Host B and when Host A comes up data gets synced to HostA. > > Hope this helps !!!! > > Thanks > kasturi > > > On 05/17/2017 11:31 PM, TranceWorldLogic . wrote: > > Hi, > > Before trying out, I want to understand how glusterfs will react for below > scenario. > Please help me. > > Let consider I have two host hostA and hostB > I have setup replica volume on hostA and hostB. (consider as storage > domain for DATA in ovirt). > I have configure data domain mount command with backup server option > (backup-volfile-server) as hostB (I mean main server as hostA and backup as > hostB) > > 1> As I understood, VDSM execute mount command on both hostA and > hostB.(for creating data domain) > 2> That mean, HostB glusterFS CLIENT will communicate with main server > (hostA). > (Please correct me if I am wrong here.) > 3> Let say HostA got down (say shutdown, power off scenario) > 4> Due to backup option I will have data domain available on HostB. > (Now glusterFS CLIENT on HostB will start communicating with HostB > GlusterFS SERVER). > 5> Now let say HostA comes up. > 6> Will it sync all data from HostB to HostA glusterFS server ? > (as per doc, yes, i not tried yet, want to confirm my understanding) > 7> Will glusterFS CLIENT on HostB start communicate with main server > (HostA) ? > > Please let me know, I am new to glusterFS. > > Thanks, > ~Rohit > > > _______________________________________________ > Users mailing listUsers@ovirt.orghttp://lists.ovirt.org/mailman/listinfo/users > > >
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