[Ocfs2-users] OCFS2 and berkeley database files

[Sunil Mushran]

ocfs2 supports private mmap r/w and shared mmap readonly.
Shared mmap writeable is the only piece missing. We should have that by 1.4.

Alexei_Roudnev wrote:
> There was a clear answer, WHY it did not worked on OCFSv2:
>
> - BerkleyDB and LDAP uses mmap to the files;
> - OCFSv2 don't implement it (because it is not possible to do such mapping
> in the cluster FS)
> - So they dont work on OCFSv2
>
> Am I correct?
>
> ----- Original Message ----- 
> From: <hartmut.woehrle at mail.pcom.de>
> To: "Michael Wood" <michael.wood at uct.ac.za>
> Cc: <ocfs2-users at oss.oracle.com>
> Sent: Wednesday, December 06, 2006 2:33 AM
> Subject: Re: [Ocfs2-users] OCFS2 and berkeley database files
>
>
> Am Mi, 6.12.2006, 09:35, schrieb Michael Wood:
>
>   
>> Berkeley DB does have problems with certain filesystems (e.g.
>> NFS) so maybe this is a similar issue.  (Just a wild guess.)
>>
>>     
> Yes I found the Orcale FAQ. So it is s structural problem with a "simple"
> DB and then trying to open it more than once
>
>
>   
>> OpenLDAP supports various different backends.  Maybe one of the
>> others will work better?
>>
>>     
> Perhaps, but my guess is, that the funktionality of an cluster filesystem
> always uses an access to every file, even if it is not connected to a
> service. So I think it will not work if theses files are not able to
> handle more than one access at one time.
>
>   
>> Cyrus also supports various different database types for its
>> databases.  Maybe try one of the others.  I have never used either
>>     
> OpenLDAP
>   
>> or Cyrus on ocfs2, so I can't guarantee anything :)
>>     
>
> Same as above
>
>   
>>     
>>> Server is a DELL Poweredge with EMC CLARiiON SAN
>>> System SuSE SLES9 SP3+
>>> ->  2.6.5-7.244-smp Kernel with (...> modinfo ocfs2):
>>> license:        GPL
>>> author:         Oracle
>>> version:        1.1.7-SLES 5AF01E6455FC04917FE52FB
>>> description:    OCFS2 1.1.7-SLES Tue Nov  1 14:45:27 PST 2005 (build
>>> sles) depends:        ocfs2_nodemanager,ocfs2_dlm,jbd
>>> supported:      yes
>>> vermagic:       2.6.5-7.244-smp SMP gcc-3.3
>>>
>>>       
>> [snip]
>>
>>
>> 2.6.5-7.244 was released with SLES9 SP3.  You might want to
>> patch your box to 2.6.5-7.282 (which I think is the latest.)
>>
>> The 7.282 version of the SLES9 SP3 kernel comes with ocfs2
>> version 1.2.1-SLES.
>>     
>
> Yes, but this EMC multipath software installs some kernelmodules
> (binaries, no sources) and they only match with the kernels in the list.
> So I have to wait for the next release :(((
>
>   
>> On the ocfs2 homepage it says:
>>
>>
>> SuSE Linux Exterprise Server 9: OCFS2 1.2.1 is bundled
>> with the SLES9 SP3 (2.6.5-7.257 and later) release. SLES9 users must
>> upgrade to the latest SP3 kernel (2.6.5-7.257 or later) and install
>> ocfs2-tools and ocfs2console packages. For more on OCFS2 bundling with
>> SLES9, refer to the Novell SLES9 section in the FAQ
>>
>>     
>
> See above
>
>   
>> --
>> Michael Wood <michael.wood at uct.ac.za>
>>
>>
>>     
>
>
>
> _______________________________________________
> Ocfs2-users mailing list
> Ocfs2-users at oss.oracle.com
> http://oss.oracle.com/mailman/listinfo/ocfs2-users
>
>
> _______________________________________________
> Ocfs2-users mailing list
> Ocfs2-users at oss.oracle.com
> http://oss.oracle.com/mailman/listinfo/ocfs2-users
>