I don't mean traditional LAN-free, but LAN-free backup directly to disk using
SANergy (which is an IBM product...)
SANergy is a product, client/server, which allow spare of SAN disk space.
It can be used with TSM :
A dedicated storage pool disk is shared among SAN with nodes.
Management class direct datas to disk space.
Datas flux go through SAN and, as usual, meta data through LAN.
My wish is to reduce number of Storage Agent, and for elgible nodes, to
continue LAN-free but with a data flux directed to disk spaces.
In my idea, are elegible, node with kind of data "special" SAN ;-) aka
databases and so but with too small sizes to be really efficient on tape
LAN-free. Can be eligible too, boxes without enough CPU power to "push"
efficiently datas through tape SAN and which used tape in long long time
backups.
I don't know is I am clear in my explanation, but I am just exploring this
possibility so what I need is not technical advices but experience feedback
about SANergy with TSM.
Pierre
> -----Message d'origine-----
> De : ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] De
> la part de Larry Clark
> Envoyé : mardi 2 octobre 2007 14:22
> À : ADSM-L AT VM.MARIST DOT EDU
> Objet : Re: [ADSM-L] SANERGY
>
> Pierre,
> Do you mean Lan-free backups?
>
> Look at: the Redbook: "Getting more out of your SAN with TSM"
>
> From what I read it appears many sites will try to implement
> Lan-free if they have an environment that supports it, but
> depending on the specifics, there may be no performance
> advantage but there will be a lot of configuration and sys
> admin maintanance overhead. Are you backing up large
> databases or files on those NT boxes?
>
> From the Redbook:
>
> SAN-based (or LAN-free) backup performance will decrease when
> many smaller objects are transferred, because more time is
> spent in non-SAN communications. In some cases, a LAN-based
> backup might even be faster than a SAN-based one for the same
> workload. Most typically, using LAN-free for backing up
> larger objects, such as database files or full volume image
> backups, yields the best performance. Traditional Tivoli
> Storage Manager progressive incremental backups usually
> perform better over the LAN than LAN-free, because this type
> of backup typically does not exploit fully the speed of the
> SAN or allow a tape drive to operate at streaming speeds.
> LAN-free to disk backup might also be appropriate for these
> type of environments.
>
> ----- Original Message -----
> From: "CAYE PIERRE" <Pierre.Caye AT ALCATEL-LUCENT DOT FR>
> To: <ADSM-L AT VM.MARIST DOT EDU>
> Sent: Tuesday, October 02, 2007 8:01 AM
> Subject: [ADSM-L] SANERGY
>
>
> Hi,
>
> I am looking for feedback about use of SANergy.
>
> Looking for impressions, efficiency, applicable domains,
> problematics, difficulties and so.
>
> I am studying possible implementation of SANergy for backup
> purpose in wintel world (with AIX/TSM Server).
>
> Regards,
>
> Pierre
>
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