[Gluster-users] SSD Cache Without RAID Controller

[Punit Dambiwal]

Hi Alex,

Yes....I will use CentOS 7 in my ENV for Glusterfs...

Also 2*480 GB SSD for caching purpose...so can make it as mirror for SLOG
and L2ARC....How to use this SSD mirror for all 10*SATA drive and leverage
the SSD caching ??


On Fri, Apr 24, 2015 at 4:36 PM, Alex Crow <acrow at integrafin.co.uk> wrote:

>
> On 24/04/15 09:14, Punit Dambiwal wrote:
>
>> Hi,
>>
>> I want to use the glusterfs with the following architecture :-
>>
>> 1. 3* Supermicro servers As storage node.
>> 2. Every server has 10 SATA HDD (JBOD) and 2 SSD for caching (2
>> Additional on back pane for OS).
>> 3. Gluster should be replica=3
>> 4. 10G network Connection....
>>
>> The question is how to configure the SSD caching for 10 Bricks,just like
>> CEPH (write the journal on SSD drives)...I didn't find any article for the
>> same..
>>
>> Thanks,
>> Punit
>>
>>  You have at least 2 choices for SSD caching with current GlusterFS.
>
> 1. Use Centos 7 and use LVM cache on your SSDs.
> 2. Use ZFS as your brick filesystem and set up an SLOG, say 4GB and an
> L2ARC (rest of the space) on the SSDs. Note that the SLOG would need to be
> a mirror if you only have 2 SSDs. L2ARC can be a stripe.
>
> Native Glusterfs tiering is being developed at the moment.
>
> Alex
>
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