Re: ocfs2+drbd two-primary
Yes I have encountered some issues on ocfs2 but these were not split-brain problems. Also my problems reasons were about the SPOF. So I want to use Drbd. I will join to drbd maillist and ask this subject on there again.
Thanks,
Igor Cicimov <icicimov@gmail.com> wrote:
>On Wed, Dec 26, 2012 at 11:47 PM, Atıf CEYLAN <mehmet@atifceylan.com> wrote:
>
>> **
>> On Wed, 2012-12-26 at 23:12 +1100, Igor Cicimov wrote:
>>
>> Maybe try heartbeat if tou are after something simple. Using dual primary
>> though without fencing is asking for trouble, split brain and lost od data.
>>
>> Yes. maybe I will encounter a split brain problem. I had asked the first
>> question for this very reason. I have a similar problem with GlusterFS. But
>> drbd and ocfs2 are block device level software, I think so that won't be
>> problematic as GlusterFS.
>> Also please, could you make "reply all"?
>>
>>
>> I haven't used ocfs2 so I can't comment on it, but from what I could read
>it handles split brain situations better than gfs2 and doesn't require
>fencing. The gfs2, as an alternative to ocfs2, apart from fencing requires
>cman configuration as well. But you say you are not happy with your tests
>with ocfs2 ...
>I would say the best place for your question is the Linbit drbd mailing
>list. I'm sure you'll find more competent answers there from people using
>various setups in production.
>At the end of the day there isn't any 100% secure option in the free
>software world. If you want it, you need to spend some money on hardware
>appliance like NetApp lets say or Veritas or similar.
>
>
>> On 26/12/2012 2:35 PM, "Atıf CEYLAN" <mehmet@atifceylan.com> wrote:
>>
>> You are saying me that use HA and you have a master file system and
>> share from on it via NFS to the other server. is that right?
>> I tried some scenarios about cluster. GlusterFS, NFS and OCFS2. My system
>> daily load is very highly. It's over 50 million transactions daily. So nfs
>> and glusterfs are not great working under the real load. ocfs2 is best
>> solution for me. Because I have many small files and GlusterFS and NFS can
>> not great work with many small files (or many write operations). When ocfs2
>> use be without drbd, it does go haywire at any fault or crash situation. So
>> I want to try ocfs2+drbd.
>>
>> On Wed, 2012-12-26 at 12:02 +1100, Igor Cicimov wrote:
>>
>> Then you dont need cluster at all do you. Or maybe you dont understand
>> what cluster really means and provides. If you just need apps running on
>> two nodes without any management software then use simple load balancing.
>> Maybe even a NAS providing nfs mount for the mail storage instead of drbd.
>>
>>
>>
>>
>>
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