In my limited experience with DD (Data Domain) and DLM (emulated virtual tape)
the issues we had was time to replicate and since we wanted the less-expensive
solution we shared our DD with the distributed systems.
We replicated to a local DR site, over black fiber and to a DR site almost 800
miles away, many issue getting the bandwidth even after the initial replication
was complete, I forget how much data we were replicating but it was not the
entire 8870 we had.
at DR we had support issues because at the time there was one person, maybe 2
in the US that knew anything about DD and DLM configuration, we were left at DR
with no support till the last minute, there were some replication issue that
should not have been replicated, also fighting for I/O with the distributed
folks, they had to shut down most of their TSM servers to allow us to get any
I/O thru put.
most if the issue I think were related to trying to get a good solution for the
cheapest price.
I would hope EMC has more support folks for this solution on the mainframe.
my 2 cents
Carmen
- Original Message -
From: "Carlos Bodra - Pessoal" <cbo...@terra.com.br>
To: IBM-MAIN@LISTSERV.UA.EDU
Sent: Friday, July 21, 2017 11:37:09 AM
Subject: RES: EMC DLm to the Cloud
I did some tests with another Vendor similar to DellEMC solution moving data
from virtual tape to cloud and results was not good. A bigger bigger reclaim
time to get dataset available to mainframe, and very expensive.
I need to store about 240TB in cloud and cost quiet project. We buy more
midrange storage and save a lot of money and get a much more fast reclaim time
to get dataset available to restore.
Carlos Bodra
IBM System Certified System z
São Paulo - Brazil
-Mensagem original-
De: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] Em nome de
R.S.
Enviada em: sexta-feira, 21 de julho de 2017 11:52
Para: IBM-MAIN@LISTSERV.UA.EDU
Assunto: Re: EMC DLm to the Cloud
W dniu 2017-07-21 o 16:32, Lizette Koehler pisze:
> http://www.storagereview.com/dell_emc_announce_dlm_45_to_eliminate_phy
> sical_tape
>
>
> Today at SHARE 2017, Dell EMC announced the latest version of its Disk
> Library for mainframe (DLm) virtual tape, version 4.5. The latest
> version of Dell EMC's cloud-based virtual tape is aiming to replace
> physical tape as the go to long-term retention strategy. Dell EMC
> states that DLm 4.5 can make the mainframe data center more efficient
> by moving mainframe virtual tape data to the cloud.
>
>
> I am not sure how big the "cloud" would have to be for some shops.
That's simple: a company sells no tapes. Only disk systems.
What can they claim?
BTW: real tapes, on foreground or just background of some VTS are really give
way to disks.
>From the other hand, spinning disks give way to SSDs.
SSDs disks (more exactly: SSD with disk interface) give way to flash systems...
--
Radoslaw Skorupka
Lodz, Poland
==
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