[lustre-discuss] Extending Lustre file system

[Andreas Dilger]

The need to rebalance depends on how full the existing OSTs are.  My recommendation if you know that the data will continue to grow is to add new OSTs when the existing ones are at 60-70% full, and add them in larger groups rather than one at a time.

Cheers, Andreas

> On Jan 8, 2024, at 09:29, Thomas Roth via lustre-discuss <lustre-discuss at lists.lustre.org> wrote:
> 
> Just mount the OSTs, one by one and perhaps not if your system is heavily loaded. Follow what happens in the MDS log and the OSS log.
> And try to rebalance the OSTs fill levels afterwards - very empty OSTs will attract all new files, which might be hot and direct your users's fire to your new OSS only.
> 
> Regards,
> Thomas
> 
>> On 1/8/24 15:38, Backer via lustre-discuss wrote:
>> Hi,
>> Good morning and happy new year!
>> I have a quick question on extending a lustre file system. The extension is performed online. I am looking for any best practices or anything to watchout while doing the file system extension. The file system extension is done adding new OSS and many OSTs within these servers.
>> Really appreciate your help on this.
>> Regards,
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