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ganmain
New User
Joined: 19 Feb 2005
Posts: 25
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Hi friends
I WANT TO KNOW THE UNIQUE FEATURES OF
MAINFRAMES WHICH OTHER SYSTEMS DON'T HAVE.
I WANT TO KNOW WITH COMPARISON WITH OTHER
SYSTEMS .
PLEASE CLARIFY THIS |
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References
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 Posted: Sun Mar 13, 2005 12:43 pm Post subject: Re: unique features of mainframes |
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mcmillan
Site Admin
Joined: 18 May 2003
Posts: 846
Location: India
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ganmain
New User
Joined: 19 Feb 2005
Posts: 25
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thank you for showing that link.
but i cannot able to understand some terms
reliable single thread performance and maximum I/O connectivity
can you explain these terms in simple way |
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mcmillan
Site Admin
Joined: 18 May 2003
Posts: 846
Location: India
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Reliable single thread performance:
Allocating each Job to one Processor without Sharing the CPU Time is Single Threading.
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| Some processes, such as the merge phase of a sort/merge (sorting can be subdivided...) MUST be run single thread. Other operations (balancing b-trees, etc) are single thread and tend to lock out other accesses. Therefore, single thread performance is critical to reasonable operations against a DataBase (especially when adding new rows). |
maximum I/O connectivity
Ability to connect more Input output devices.
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| Mainframes excel at providing a convenient paradigm for HUGE disk farms; While SAN devices kind of weaken this to some degree, SAN devices mimic the model of the Mainframe in connectivity "tricks" (at least internally). |
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