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Home > Archive > Data Storage > October 2004 > HDS TrueCopy
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| Rodrick Brown 2004-10-24, 5:45 pm |
| Hello all,
Anyone know how complex HDS Truecopy replication is we have all the the
nessassry components in place the only real issue is actually
identifying the SVOLS on the remote systems and turning on replication.
We have no real true HDS specialist on staff on dont want to pay for
consulting resources I've just been reading over the Truecopy manuals
and was just wondering if this is something one could do without proper
training ? Our team has lots of experience with storage in general and
for replication in the past we have only used Veritas volume
replicator. Any gotcha's to look out for thanks.
--
Unix Systems Engineer
The City of New York
Dept. of Information Technology
http://www.nyc.gov/doitt
rbrown[(@)]doitt.nyc.gov
http://www.rodrickbrown.com
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| On Sun, 24 Oct 2004 15:25:52 GMT, Rodrick Brown wrote:
>Anyone know how complex HDS Truecopy replication is we have all the the
>nessassry components in place the only real issue is actually
>identifying the SVOLS on the remote systems and turning on replication.
>We have no real true HDS specialist on staff on dont want to pay for
>consulting resources I've just been reading over the Truecopy manuals
>and was just wondering if this is something one could do without proper
>training ? Our team has lots of experience with storage in general and
>for replication in the past we have only used Veritas volume
>replicator. Any gotcha's to look out for thanks.
Ummm... sure you can try it without any HDS specialist consultancy as
long as you know the risks. Fundamentally it's similar to Veritas
Volume Replicator and once you have determined the correct P-VOLs and
S-VOLs you should be able to kick it off ok.
If it's important enough to replicate the data, is it something you
really want to be messing around with if you're not 100% sure of what
you're doing?
Where a consultant would come in handy is for scripting and procedures
for when things aren't working properly.
HVB.
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| Rodrick Brown 2004-10-24, 5:45 pm |
| On 2004-10-24 13:46:46 -0400, HVB <devnull@127.0.0.1> said:
> On Sun, 24 Oct 2004 15:25:52 GMT, Rodrick Brown wrote:
>
>
> Ummm... sure you can try it without any HDS specialist consultancy as
> long as you know the risks. Fundamentally it's similar to Veritas
> Volume Replicator and once you have determined the correct P-VOLs and
> S-VOLs you should be able to kick it off ok.
>
> If it's important enough to replicate the data, is it something you
> really want to be messing around with if you're not 100% sure of what
> you're doing?
>
> Where a consultant would come in handy is for scripting and procedures
> for when things aren't working properly.
>
> HVB.
Currently we are using VVR for the main production data and we are just
going to be evaluating the performance and flexibility of VVR vs
Truecopy, as of right now I will be testing with dummy data only and
probably not look to change the production system until me and my staff
are fully comfortable with Truecopy. One this i'm worried about is
muxing up the Producting HDS system hopefully it will be straight
forward enough to do without breaking anything. Yeah but I do see what
you mean. Do you know if HDS provide something like Blueprints like Sun
do ?
--
Unix Systems Engineer
The City of New York
Dept. of Information Technology
http://www.nyc.gov/doitt
rbrown[(@)]doitt.nyc.gov
http://www.rodrickbrown.com
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| Faeandar 2004-10-25, 8:45 pm |
| On Sun, 24 Oct 2004 15:25:52 GMT, Rodrick Brown
<rbrown[@]doitt.nyc.gov> wrote:
>Hello all,
>
>Anyone know how complex HDS Truecopy replication is we have all the the
>nessassry components in place the only real issue is actually
>identifying the SVOLS on the remote systems and turning on replication.
>We have no real true HDS specialist on staff on dont want to pay for
>consulting resources I've just been reading over the Truecopy manuals
>and was just wondering if this is something one could do without proper
>training ? Our team has lots of experience with storage in general and
>for replication in the past we have only used Veritas volume
>replicator. Any gotcha's to look out for thanks.
To get ShadownImage working the way we wanted required a month and a
half plus 3 days of HDS consultant scripting. If you want to do it
through the gui it's pretty simple, but a scripted scenario should
involve HDS or an HDS expert.
The command device alone was a pain in the arse to get functional, and
everything else relies on this...
~F
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| On Sun, 24 Oct 2004 19:27:22 GMT, Rodrick Brown wrote:
>Currently we are using VVR for the main production data and we are just
>going to be evaluating the performance and flexibility of VVR vs
>Truecopy, as of right now I will be testing with dummy data only and
>probably not look to change the production system until me and my staff
>are fully comfortable with Truecopy.
Ok! So if you are comfortable with VVR, then the concepts of TrueCopy
aren't going to be major difficulty. As always, there's a learning
curve, but it's not going to be as steep for you.
>One this i'm worried about is
>muxing up the Producting HDS system hopefully it will be straight
>forward enough to do without breaking anything. Yeah but I do see what
>you mean.
That's the big risk. I'd be worried too. Ideally you should test on
a non-production array. Personally, I wouldn't attempt this on a
production system unless I'd had full training and/or had a HDS expert
walking me through it.
Sounds like you're going to have to test on the live system. However,
I strongly encourage you to leave the production volumes alone - don't
even attempt to use TrueCopy on them. If the production volumes get
blown away... it's going be a nightmare!
Have you got ShadowImage also? If so, I suggest taking a copy of your
production volume and then use that as the TrueCopy P-VOL. If you
don't have ShadowImage, then create some new P-VOLs and use them
instead. You'll have to create some data from somewhere - maybe
restore some data from a backup.
>Do you know if HDS provide something like Blueprints like Sun
>do ?
Not that I'm aware of. Contact your HDS SE or Site CE, they might be
able/willing to help you out. At a guess, their Professional Services
guys should have some documentation around this.
HVB
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