We have adopted it in a cluster node environment. We have 6 drives that will
be shared as amongst 3 clusters with 6 nodes. Each node is assigned a tape
drive with sharing allowed across some of them. We have 4.6 terabyte san
that is being backed up with this system, each node in the cluster is also a
Legato storage node. It appears to be working but we have not brought up all
of the nodes yet. With the DDS all of the tape drives known by the primary
backup system automatically unload tape drives after a specified time. This
parameter can be adjusted. One item I do not like is although a tape drive
is no longer being used, one of the other systems will not pick it up until
the tape drive is unloaded by the timeout feature. I find myself balancing
between a short time necessary for those using DDS versus a long time for
those without DDS. Our tape drives are 9840's which load and unload very
fast, but I don't like have tapes auto unload and within a minute or two the
same tape reloaded.
This solution was a cost effective way of getting more use out of the active
tape drives, and reduced the number needed to support the SAN.
-----Original Message-----
From: Passanesi, Scott [mailto:spassanesi AT ESTEE DOT COM]
Sent: Friday, September 13, 2002 10:09 AM
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Subject: [Networker] Dynamic Drive Sharing
Has anyone implemented Dynamic Drive Sharing? If so, I would like to hear
experiences, opinions on how effective and useful it has been to your
environment. Was it worth the cost of licensing, switches, etc? We
considering using DDS but would like some real-world experiences. I
apologize if this has been discussed previously.
Thanks,
Scott
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