[Linux-cluster] FS-Cache

[Mike Cardwell]

On 27/08/2009 14:25, Steven Whitehouse wrote:

>>>> Are there any plans to make GFS work with FS-Cache?
>>>>
>>>> http://people.redhat.com/~dhowells/fscache/FS-Cache.pdf
>>>
>>> Not that I'm aware of. I'm not sure it would make any sense to do so,
>>
>> Hi. Can you explain why it wouldn't make any sense please? I have a GFS
>> filesystem mounted over 100Mb iSCSI (I'm not in a position to upgrade
>> the network speed at this time, but will in future). It's read heavy.
>> Particular files will be hit very regularly. I just thought it would be
>> nice if those files could be cached locally rather than repeatedly
>> pulling them over the network...?
>
> Unless you are doing something to push those files out of the cache,
> then they will be cached locally anyway. GFS2 is a bit better at doing
> that then GFS1 though,

Are you refering to some sort of in-memory cache? I've not been able to 
find any information about how GFS2 caches file data and how to tune it 
(if possible)? Each of my servers has over 100GB of unused local 
storage. It would be nice if I could use that as a cache...

-- 
Mike Cardwell - IT Consultant and LAMP developer
Cardwell IT Ltd. (UK Reg'd Company #06920226) http://cardwellit.com/