[Gluster-users] Understand Geo Replication of a big Gluster
Axel Gruber
axel at agm.de
Fri Jun 15 19:29:01 UTC 2018
Hello Thanks for Information
I tryed to install Geo Replication again - setup SSH Key - prepared session
Broker and so on (shown in the Manual)
But i get this error:
root at glusters1:~# gluster volume geo-replication gpool geo.com::geovol
create force
Please check gsync config file. Unable to get statefile's name
geo-replication command failed
I use "force" command because Slave Gluster is to small - but its empty -
so whtiout Force i get:
root at glusters1:~# gluster volume geo-replication gpool geo.com::geovol
create
Total disk size of master is greater than disk size of slave.
Total available size of master is greater than available size of slave
geo-replication command failed
Can anyone help me to understand whats going wrong here ?
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Am Fr., 15. Juni 2018 um 03:37 Uhr schrieb Kotresh Hiremath Ravishankar <
khiremat at redhat.com>:
> Hi Axel,
>
> No geo-replication can't be used without SSH. It's not configurable.
> Geo-rep master nodes connect to slave and transfers data over ssh.
>
> I assume you have created the geo-rep session before start.
> In the command above, the syntax is incorrect. It should use "::" and not
> ":/"
>
> gluster volume geo-replication gpool glusergeo::geovol start
>
> Thanks,
> Kotresh HR
>
> On Fri, Jun 15, 2018 at 1:32 AM, Axel Gruber <axel at agm.de> wrote:
>
>> Hello
>>
>> First of all Thank you for Information
>>
>> As First Try i want to setup Geo -Replication in a Test System with
>> Virtual Machines
>>
>> So for the Test i have a distributed Gluster with 3 Nodes:
>>
>> Status of volume: gpool
>> Gluster process TCP Port RDMA Port Online
>> Pid
>>
>> ------------------------------------------------------------------------------
>> Brick glusers1:/mnt/glust/gpool 49152 0 Y
>> 568
>> Brick glusers2:/mnt/glust/gpool 49152 0 Y
>> 574
>> Brick glusers3:/mnt/glust/gpool 49152 0 Y
>> 665
>> NFS Server on localhost 2049 0 Y
>> 1127
>> NFS Server on glusers2 2049 0 Y
>> 926
>> NFS Server on glusers3 2049 0 Y
>> 695
>>
>> on The Slave Side i have created also a volume
>>
>> Status of volume: geovol
>> Gluster process TCP Port RDMA Port Online
>> Pid
>>
>> ------------------------------------------------------------------------------
>> Brick glusergeo:/mnt/glust/geo 49152 0 Y
>> 629
>>
>> The Maser Side can "see" the Hostname and Ping the IP of the Slave
>> root at glusters1:~# ping glusergeo
>> PING glusergeo (172.20.230.86) 56(84) bytes of data.
>> 64 bytes from glusergeo (172.20.230.86): icmp_seq=1 ttl=64 time=3.85 ms
>>
>> So for Test i not want to use SSH and i Tryed:
>>
>>
>> root at glusters1:~# gluster volume geo-replication gpool glusergeo:/geovol
>> start
>> Invalid Url: glusergeo:/geovol
>>
>> Is it not possible to user geoReplication without SSH ?
>>
>> Best Regards
>>
>>
>> Am Do., 14. Juni 2018 um 16:27 Uhr schrieb Milind Changire <
>> mchangir at redhat.com>:
>>
>>> Hello Axel,
>>> A warm welcome to you and happy to see you board the Gluster ship.
>>>
>>> geo-replication requires two clusters: one master cluster which is the
>>> source cluster and the second cluster called the slave cluster which is the
>>> destination cluster
>>>
>>> Just as you have created a primary/master cluster, you need to create
>>> another cluster out of the backup servers in whatever configuration (volume
>>> type) you want to create. The volume type of the slave cluster need not be
>>> the same as the master cluster.
>>>
>>> Once you've created the slave cluster, you can then use geo-replication
>>> commands to create a communication channel between the two clusters so that
>>> the sources from the master cluster are replicated to the slave cluster and
>>> to keep pushing any updates to the slave cluster.
>>>
>>> Hope this helps.
>>>
>>>
>>>
>>> On Thu, Jun 14, 2018 at 6:23 PM, Axel Gruber <axel at agm.de> wrote:
>>>
>>>> Hello
>>>>
>>>> Im new on GlusterFS - so a warm hello to everyone here...
>>>>
>>>> Im testing GlusterFS since some Weeks in different configurations for a
>>>> big Media Storage
>>>>
>>>> Currently for start we plan a distributed / Replicated Gluster with for
>>>> Nodes (4x70Tb)
>>>> I tryed this within a Test Area on differenzt Virtual Machines - works
>>>> fine.
>>>>
>>>> But for security Reason we also plan Geo Replication of the Whole
>>>> Gluster. I have read Doc - but one thing i dont understand:
>>>>
>>>> For example our Start Gluster has 4 Nodes (4x70TB Replicated and
>>>> Distributed) i have 140TB Capacity.
>>>>
>>>> So when i want to Geo Replicate this Volume i dont have a sigle Server
>>>> wich is able to store 140GB (or later more) - but i can have several Backup
>>>> Servers with a total Sice of 140TB
>>>>
>>>> So my Question
>>>>
>>>> How can i say Gluster FS in Geo Replication to use all of this Backup
>>>> Servers to GEO REplicate the whole Storage using all Backup Server.
>>>>
>>>> Best Regards
>>>>
>>>>
>>>> _______________________________________________
>>>> Gluster-users mailing list
>>>> Gluster-users at gluster.org
>>>> http://lists.gluster.org/mailman/listinfo/gluster-users
>>>>
>>>
>>>
>>>
>>> --
>>> Milind
>>>
>>>
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>>
>
>
>
> --
> Thanks and Regards,
> Kotresh H R
>
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