Frank

On 5/12/08 2:28 PM, David Dulek wrote:

Hopefully, the Product and Development managers take notice that
staging/cloning to tape is important if the two are going to be sold
together successful.  I know the sales tactic, currently, is to convince
you that tape is "evil".


On Mon, 2008-05-12 at 11:17 -0700, Jonathan Loran wrote:

Thanks David.  I can get a steep discount on the price being an EDU
site.  (I know, it's not fair, but we are also poor, so it evens out.)
Otherwise that would be a killer out of the gate.  The thing that I'm
most worried about is the CPU intensive bit.  Some of our clients are
quite old and may not have the juice to run Avamar.  Also sorry to
hear you can't stage to tape.  That also is a problem for our off site
scheme.  I guess EMC wants you to buy two of everything.  A bit of a
racket.

Regards,

Jon

David Dulek wrote:

I have just completed a POC for Avamar.

You thought that the Data Domain was expensive get a price on Avamar. :)

In order to do the 15 TB capacity that I have on my 580, I would have to buy 9x2U servers (with 6x1TB drives, that is 8 x 2T servers with a hot spare server) and a 1U server (control station). If I want to replicate to the other DC, double that. Now add the EMC software licensing. :)

It seems to work including the integration into the NetWorker tools and it is very easy to setup within NetWorker.

Negatives:
No module support.

No way to do D2D2T without going to a different disk target. (You have to configure two sets of backups. One for Avamar and disk only and one for disk that will go to tape.) Although the client licensing on the Avamar has gone away you still have to pay for the NetWorker Client license.

Very CPU intensive.

/nsr has to be big enough on all clients to save the "caches". ( I ran "/" out of space on one of the test linux clients. )

Positives:
Impressive compress and network savings.

Since I already have a Data Domain infrastructure to handle the modules backups, this is something I am still considering.

I am not sure if I am OK with running two backups per client per day that I want on tape and the Avamar grid.

On Saturday 10 May 2008, Jonathan Loran wrote:

Hi Conrad and list:

We investigated Data Domain, and we did a test of a DD200 when it first
came out, 3 or so years back.  Was very impressed with the speed and
somewhat impressed with the dedupe ratio.  However, it was way to
expensive for our UC budget.

More to my point: we are interested in investigating Avamar, which is
integrated into Networker 7.4.2.  It has in interesting implementation
where the data duplication is discovered on the client side, such that
the Avamar server keeps a hash of stored checksums, and the client
queries the server as to whether the data block already exists on the
server.  If not, the data is sent with the checksum, if so, only the
next checksum needs to be sent.  This has the benefit of potentially
dramatically reducing network traffic.

I'm wondering if anyone on the list has experience with EMC Avamar?  It
would be great to hear some non-biased reviews before I proceed.

Thanks,

Jon

Macina, Conrad wrote:

Hi, Kevin,

Leaving aside for at least a moment the discussion of vendors and spam,
I'm very interested in what you receive from your query about Data
Domain and possibly other dedupe vendors. I suspect other list members
will be as well. When you're done with your investigation, I wonder if
you could you please post a summary of your findings to the list?

One finding I'm particularly interested in: is it properly spelled
"dedupe" or "dedup"? :^)

Thanks!

Conrad Macina
Pfizer, Inc.



-----Original Message-----
From: Kevin Malone [mailto:kcmalone AT SALISBURY DOT EDU]
Sent: Thursday, May 08, 2008 2:01 PM
Subject: Networker and Data Domain

If there is anyone out there who is using a Data Domain dedupe solution
with Networker and would be willing to have a conversation (good or bad)
about it with me, I would be appreciative.

We are looking at dedupe solutions and I am not endorsing any at this
point, but that is one that we have come across.

You can send me a private e-mail so as not to clog up the listserv.

Thanks,
Kevin



Kevin Malone
Network Administrator
Salisbury University
Information Technology  FH297
kcmalone AT salisbury DOT edu
410-543-6298

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-     _____/     _____/      /           - Jonathan Loran -           -
-    /          /           /                IT Manager               -
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Sr Systems Administrator        | Always remember: You are UNIQUE,
University of Vermont           |    just like everyone else.
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