How many ram...

[Linda Kateley]

I will say one more thing.. I also have a customer who uses zfs for 
security camera storage. The cameras deliver 100's of k bytes per 
minute... But they save the data for a very very very long time. That 
kind of system would need very little ram(maybe 8GB) but lots and lots 
of disk.

lk

On 1/14/15 10:38 AM, Albert Shih wrote:
>   Le 13/01/2015 à 08:16:12-0600, Linda Kateley a écrit
>> Jas,
>>
>> Most of those rules of thumbs are not valid. ZFS doesn't really need to
>> keep data about metadata in ram. It keeps recently used and frequently
>> used items in cache. There are some per disk caches but by default those
>> are pretty small.
>>
>> I have a blog on a group that has a 350TB archive/backup system with
>> 32GB ram. http://kateleyco.com/?p=815
> That's very conforting ;-) That's mean I didn't need to by 1To of Ram when
> I go to 1Po file server.
>
>> Everything is dependent on use case. If you have many users all using
>> the same file, frequently.. that will be cached. Sizing workload helps.
> Thanks you to everyone.
>
> Regards.
>
> JAS
>
> --
> Albert SHIH
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> mer 14 jan 2015 17:35:13 CET