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From Jason Davis <>
Subject Re: Primary Storage
Date Mon, 22 Oct 2012 19:30:39 GMT
ZFS would be an interesting setup as you can do the cache pools like you
would do in CacheCade. The problem with ZFS or CacheCade+DRBD is that they
really don't scale out well if you are looking for something with a unified
name space. I'll say however that ZFS is a battle hardened FS with tons of
shops using it. A lot of the whiz-bang SSD+SATA disk SAN things these
smaller start up companies are hocking are just ZFS appliances.

RBD looks interesting but I'm not sure if I would be willing to put
production data on it, I'm not sure how performant it is IRL. From a
purely technical perspective, it looks REALLY cool.

I suppose anything is fast if you put SSDs in it :) GlusterFS is another
option although historically small/random IO has not been it's strong point.

If you are ok spending money on software and want a scale out block storage
then you might want to consider HP LeftHand's VSA product. I am personally
partial to NFS plays:) I went the exact opposite approach and settled on
Isilon for our primary storage for our CS deployment.

On Mon, Oct 22, 2012 at 10:24 AM, Nik Martin <>wrote:

> On 10/22/2012 10:16 AM, Trevor Francis wrote:
>> We are looking at building a Primary Storage solution for an
>> enterprise/carrier class application. However, we want to build it using
>> a FOSS solution and not a commercial solution. Do you have a
>> recommendation on platform?
> Trevor,
> I got EXCELLENT results builing a SAN from FOSS using:
> OS: Centos
> Hardware: 2X storage servers, with 12x2TB 3.5 SATA drives.  LSI MegaRAID
> with CacheCade Pro, with 240 GB Intel 520 SSDs configured to do SSD caching
> (alternately, look at FlashCache from Facebook)
> intel 10GB dual port nics, one port for crossover, on port for up link to
> storage network
> DRBD for real time block replication to active-active
> Pacemaker+corosync for HA Resource management
> tgtd for iSCSI target
> If you want file backed storage, XFS is a very good filesystem on Linux
> now.
> Pacemaker+Corosync can be difficult to grok at the beginning, but that
> setup gave me a VERY high performance SAN.  The downside is it is entirely
> managed by CLI, no UI whatsoever.
>> Trevor Francis
>> Partner
>> 46 Labs | The PeerEdge Cloud
>> <> |
>> <>
>> 405-362-0046 - Voice  | 405-410-4980 - Cell
>> trevorgfrancis - Skype
>> <>
>> Solutions Provider for the Telecom Industry
>> <**peeredge <>><
>> http://www.twitter.**com/peeredge <>><
>> http://www.** <>><
>> http://** <>>
> --
> Regards,
> Nik
> Nik Martin
> VP Business Development
> Nfina Technologies, Inc.
> + x1003
> Relentless Reliability

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