[Ocfs2-users] ocfs2 migration

[Sunil Mushran]

Do ls -l and get the actual size in bytes (and not in GB). The sizes 
should be
exactly the same.

The link posted answers your questions regarding slots and cs.

Mehmet Can ÖNAL wrote:
> Could you explain  more about cluster sizes and number of slots? Also their effects to sizes? I know not much about them so it's hard to understand the effect for me :)
>
> Another point that i want to mention is we "fscp" 250GB ocfs volume to another 250GB ocfs2 volume that is terminated. When look at the copied parts i see that we lost nearly 8GB, the data is grown 8GB. Every 30GB datafile is become 31GB datafile in ocfs2. What is this 8GB stand for? Is it all journal?
>
>
> Thanx for your time
>
> İyi Çalışmalar
>  
> Mehmet Can ÖNAL
> Sistem Uzman Yardımcısı
> Merkezi Sistem Yönetimi Müdürlüğü
>  
>   
> Eskişehir Yolu 4.Km. 2.Cad. No:63 C Blok 
> Söğütözü 06520 ANKARA
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> Voip  : 6432
> Faks : 312 2891450
> mconal at fintek.com.tr
>
> -----Original Message-----
> From: Sunil Mushran [mailto:Sunil.Mushran at oracle.com] 
> Sent: Wednesday, February 27, 2008 8:16 PM
> To: Mehmet Can ÖNAL
> Cc: ocfs2-users at oss.oracle.com
> Subject: Re: [Ocfs2-users] ocfs2 migration
>
> The biggest difference in metadata usage between ocfs and ocfs2 would be
> the journal. We use larger journals in ocfs2 (for performance). Also,
> we use a default of 4 slots, which may be more than you require. If so,
> reduce.
>
> The other thing would be clustersize. If the volume only has large files,
> then this will not be an issue. If, however, you have many small files
> and are using a large clustersize, reduce cs.
>
> To see the journal sizes, do:
> $ debugfs.ocfs2 -R "ls -l //" /dev/sdX
>
> To see the clustersize/numslots, do:
> $ tunefs.ocfs2 -Q "Clustersize=%T, Slots=%N\n" /dev/sdX
>
> For more, refer:
> http://oss.oracle.com/projects/ocfs2/dist/documentation/ocfs2_faq.html#FORMAT
>
> Sunil
>
> Mehmet Can ÖNAL wrote:
>   
>> Hi all,
>>
>>  
>>
>> I am trying to migrate my system to ocfs2 and i am testing the methods 
>> recommended from oracle. I tried fscat tool to migrate (copy) my ocfs 
>> data to another ocfs2 formatted disk. The copying processes is 
>> terminated because of not enough space.
>>
>> My source disk ora1 is 250 GB total space and 536 MB is free for 
>> usage. I have clone of this source disk (using EMC storages) and I 
>> tried to fscp from this clone. My destination disk is 250 GB total 
>> space and as I see copying process is terminated because of not enough 
>> space. I checked what is copied or not and I see not copied part is 
>> not too small.
>>
>>  
>>
>> I want to  ask
>>
>> - Is this a special case for fscat (fscp) or is data extended while 
>> migration from ocfs to ocfs2?
>>
>> - do you know another method for migration apart from fscat and 
>> backup/restore methods?
>>
>>  
>>
>> Thanx
>>
>>  
>>
>> İyi Çalışmalar
>>
>>  
>>
>> Mehmet Can ÖNAL
>>
>> Sistem Uzman Yardımcısı
>>
>> Merkezi Sistem Yönetimi Müdürlüğü
>>
>>  
>>
>> Eskişehir Yolu 4.Km. 2.Cad. No:63 C Blok
>>
>> Söğütözü 06520 ANKARA
>>
>> Tel    : 312 289 1053
>>
>> Voip  : 6432
>>
>> Faks : 312 2891450
>>
>> mconal at fintek.com.tr <mailto:mconal at fintek.com.tr>
>>
>>  
>>
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>
>