Each Celerra Datamover is its own NAS, and is
*definitely* limited to 4 NDMP connections. If
something happens and you try to have a fifth
connection run, the NDMP portion will get
unstable, and you may have to cycle the NAS to
get it to clear up. My suggestion is to set
client parallelism to 3 for each head.
I'm not sure what happens if you try to have more
than 4 Tape drives be used on a Celerra at once.
If you are going to go over the LAN anyways, you
may want to just have the NDMP streams write to a
standard NetWorker tape drive (nsrndmp_save -M, I
believe, does that). Tape drive management with
the Celerra is a bit difficult, since you have
limited control of paths, and have to use the
actual path name (c128t1l0, for instance, not the internal alias)
Dave
Date: Sat, 10 Mar 2007 03:27:41 +0200
From: Itzik Meirson <imeirson AT BEZEQINT DOT NET>
Subject: Re: NDMP Multiple Savestreams
Jim,
1. Make sure that more than one tape device is
available for the NDMP host (Celerra).
2. Make sure that the client parallelism fir the
NDMP Client (the Celerra) is equal to the number of available drives.
3. Make sure that the "group parallelism" for the
group doing the NDMP backups will permit multiple sessions.
4. The Celerra is probably limited to up to 4 concurrent NDMP streams.
Itzik Meirson - îàéøñåï àéöé÷
email: imeirson AT gmail DOT com
phone: +972 4 8389975
fax: +972 4 8376294
cell: +972 54 6626186
Date: Fri, 9 Mar 2007 11:59:27 -0500
From: =?UTF-8?Q?Jim_Ruskowsky?= <jimr AT JEFFERIES DOT COM>
Subject: NDMP Multiple Savestreams
I'm going to try and describe my question as best I can - hopefully clearly
enough to elicit some advice.
On our networker server, we have licenced 3 copies of "NDMP Client
Connections" of the appropriate level for our EMC Celerra. The EMC Celerra
currently has a single datamover connected (via two fibers) to the SAN, and
has the ability to access multiple tape drives (via DDS).
Currently we have succesfully run a single NMDP stream from that datamover
to a single tape drive. How do I get a second datamover running to a second
tape drive. Do I have a second copy of the client resource - each with a
unique set of "Save set" resources and put them in two different groups that
run at the same time - or is there another trick to doing this.
Thanks in advance.
Jim
===================================
David Gold
Sr. Technical Consultant
Cambridge Computer Services, Inc.
Artists in Data Storage
Tel: 781-250-3000
Tel (Direct): 781-250-3260
Fax: 781-250-3360
dave AT cambridgecomputer DOT com
www.cambridgecomputer.com
===================================
----------------------------------------------------------------------------
*Any ideas, suggestion or comments are mine alone, and are not of my company*
To sign off this list, send email to listserv AT listserv.temple DOT edu and type
"signoff networker" in the body of the email. Please write to networker-request
AT listserv.temple DOT edu if you have any problems with this list. You can access the
archives at http://listserv.temple.edu/archives/networker.html or
via RSS at http://listserv.temple.edu/cgi-bin/wa?RSS&L=NETWORKER
|
