Steve,

   We have seen our database restore reach speeds of about 25 MB/s
across a gigabit connection, but a more realistic average was 12-15MB/s.
80 GB/hr is about 23 MB/s, and we could see that if our disk were striped
in an ideal situation.

John

> -----Original Message-----
> From: Steve Schaub [SMTP:Steve.Schaub AT HAWORTH DOT COM]
> Sent: Friday, January 26, 2001 8:11 AM
> To:   ADSM-L AT VM.MARIST DOT EDU
> Subject:      Achievable throughput using Gigabit connections?
>
> I am looking to find out what kind of mb/sec other shops are getting.  Our
> environment is:
> AIX 4.3.3 Server (3466-C00 = H50 2cpu, 1gb mem, 2-gbit ethernet, 1-100mb
> ethernet) running TSM 3.7.3.8
> 3494 library using 3590E drives with 3590K tapes
> Switch is Cisco 6509 on a dedicated vlan segment
> Client is HP V2200 (16cpu, 12gb mem, 1gbit ethernet dedicated to backup
> vlan) running TSM 3.7.2 under HP-UX 11.0
>
> Specifically, when we try to archive a 100gb Oracle database on the HP (as
> a file system with approx 450 files, not using EBU/RMAN, residing on an
> EMC 3700 Symmetrix), we are seeing aggregate throughput in the 6-7mb/sec
> range, which translates into approx 4.5hrs.  When we watch the Aix
> monitor, the gbit interface varies from 15 down to 1.5mb/sec.  The cpu
> never goes over 20%.  The consultant who helped us get this installed &
> setup claims that a business down the street with almost identical
> hardware/software is able to get a single backup stream to do 80gb/hr.  So
> far we have involved HP, Tivoli, Aix, Cisco, EMC and almost every techie
> in our shop without being able to find a conclusive answer as to where our
> bottleneck is.
>
> Are other shops seeing anything close to 80gb/hr in a single stream using
> gb to gb ethernet connections?  Any pointers as to where to look, or
> recommended tools for at least diagnosing the problem?  Thanks in advance.
>
> Steve Schaub
> Haworth, Inc
> email: Steve.Schaub AT Haworthinc DOT com