G.Milazzo at sinergy
Feb 13, 2009, 1:42 AM
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Fine!
Happy to see that my question bring ourselves to this good discussion about this new chanche.
In the mean time I've read this interesting (nov. 08) white paper from NetApp (http://media.netapp.com/documents/wp-7061.pdf) and I've had a conversation with some NetApp guys here in Italy.
The current situation is that, for now, NetApp support only 3rd party SSD storage in existing SAN and this means that SSD are usable only with a v-Series in front of them and this, in my opinion, could be a limit because the question to myself is always: "Why I should use something other in front of a fine performing existing SAN?" and the answer is not always "becuase you can have all the good stuffs that NetApp has..." ;-)
The other aspect is linked to performances. Right. SSD are faster and faster, but "only" in random read operations and this can be done also using a PAM that is absolutely less expensive than SSD (a lot less!).
Anyway SSD are "ermerging" technology, their cost for GB is too much high but they're cheaper considering cost per IOP, the dilemma is how much their cost is really adequate to the real needs of performance in the hosts/applications scenario.
Bye!
-----Messaggio originale-----
Da: Sandeep Cariapa [mailto:cariapa [at] yahoo]
Inviato: venerd́ 13 febbraio 2009 6.57
A: Milazzo Giacomo; toasters [at] mathworks; Kennedy, Jeffrey
Oggetto: RE: SSD. What's about?
It depends though:
http://www.linux.com/feature/142657
I don't have hands on experience with SSD, but thought that was an eye opening article...theres a time and place for SSD it seems: seek heavy ops (boot disk, DB index) are excellent, seq: not so good.
Sandeep Cariapa
--- On Thu, 2/12/09, Kennedy, Jeffrey <jkennedy [at] qualcomm> wrote:
> From: Kennedy, Jeffrey <jkennedy [at] qualcomm>
> Subject: RE: SSD. What's about?
> To: "Milazzo Giacomo" <G.Milazzo [at] sinergy>, "toasters [at] mathworks" <toasters [at] mathworks>
> Date: Thursday, February 12, 2009, 12:35 PM
> What's it all about? Performance. Blazing fast
> performance.
>
> Think about it like this. An SSD volume can provide ~1M
> IOPS and come in sizes of up to 1TB, maybe larger since I
> last looked. Add in Flexshare and you can basically stop
> time.
>
> Jeff Kennedy
> Qualcomm, Incorporated
> QCT Engineering Compute
> 858-651-6592
>
> From: owner-toasters [at] mathworks
> [mailto:owner-toasters [at] mathworks] On Behalf Of Milazzo
> Giacomo
> Sent: Thursday, February 12, 2009 1:08 AM
> To: toasters [at] mathworks
> Subject: SSD. What's about?
>
> Hi all,
>
> there are a lot of rumors about Solid State Drives...or SS
> Disks...alfo if there are no 'disks' at all inside
> :)
> I've read some docs from NetApp and other SSD vendors.
> NetApp says they support them in vFiler (so that, as native
> disks also? considering that vFiler nowadays can work in
> mixed mode) but there aren't tech specs, availability,
> configurator does not provide them...
> So, what's about all this?
>
> Regards,
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