In <v02140b00ae2035403f2b@[129.37.235.115]>, on 07/27/96 at 02:08 PM,
Mark Vogel <mvogel AT IBM DOT NET> said:
> ..... we were wondering if anyone has a good handle on
>the implementation and operating costs of ADSM based on various storage
>size and usage assumptions. Is there an ADSM operating model that one
>could make assumptions and that would help determine hardware and
>software requirements and budgets.
Mark,
To develop an estimate of the server requirements you must have detailed
information about:
- Preferred server platform - there are lots to choose from
- The type and volume of data
- Data management requirements
- how long must you retain old versions
- how many old versions
- Data restoral requirements
- How fast must you recover on-site data
- How fast for off-site data
- Number, capacity and type of clients
- Lotus Notes servers get backed up as file clients and as Notes agents
- How much data must you back up per-day, at what time(s)
- Plan on enough magnetic disk to hold one night's backup
- What network infrastructure must you contend with?
From my experience:
- The ADSM OS/2 client compresses data 30-60%
- For file backup only, the ADSM database will be 2-3% of the size of
occupied data storage.
- For Lotus Notes agent backup, the database will consume 4-10% of the
size of occupied data storage, depending on Notes database content. ADSM
database makes an entry for each document - if majority of documents are very
small, database could occupy more space than backed up data.
- NetBIOS is faster than TCP/IP, if you have wire-speed bridges; TCP/IP is
faster if you have routers (even if they support bridging) between clients and
servers. Best performance obtained by locating ADSM servers as close as
possible to clients.
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beckpau AT ibm DOT net (Paul C. Beck)
beckpau AT ibm DOT net (Paul C. Beck)
Manassas Systems Integration Corp.
8575 King Carter Street
Manassas, Virginia 20110-4891
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