[Lustre-discuss] lustre and small files overhead lru_size question

Wojciech Turek wjt27 at cam.ac.uk
Tue Jun 10 11:25:51 PDT 2008


On 10 Jun 2008, at 19:18, Jakob Goldbach wrote:

>
>>
>> My question is why not bigger values? What determines the max  
>> lru_size.
>>
>
> The number of clients and ram on servers.
Is there a recommendation for lustre servers how much max ram one can  
spend on locks?
>
>
> Locks are held by server and client caches "copies" of locks even if
> unused. A thousand node cluster each with a lru_size of 41000 would  
> mean
> a lot of locks on the servers.
I rather think of increasing lru_size only on few login nodes where  
user access file system interactively.

Wojciech
>
>
> /Jakob
>




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