[BALU] 64 bit systems

Jim Vines jgoodguy at charter.net
Fri Jun 8 12:03:06 CDT 2007


yea.

"...To put this in perspective, in the days when 4 MiB of main memory 
was commonplace, the maximum memory ceiling of 2 to the 32th addresses 
was about 1,000 times larger than typical memory configurations. Today, 
when 1 GiB of main memory is common, the ceiling of 264 addresses is 
about ten billion times larger, i.e. ten million times more headroom."

http://en.wikipedia.org/wiki/64-bit

But some sampling and simulations could use the head room.

JIm

Mr. Panzer wrote:
> yea. I don't see you yet needing what a 256terabyte database. and 
> right now current max memory on the average board you can buy is 
> 32gig. average being dual socket intel boards for workstation/server use.
>
>
> Panzer
>
>
>
> 10 second quickie not long enough for you? Try it for 24 hours. 24 
> Heures du Mans
>
>
>
>
>
>> From: Jim Vines <jgoodguy at charter.net>
>> Reply-To: members at lists.bham-lug.org
>> To: members at lists.bham-lug.org
>> Subject: Re: [BALU] 64 bit systems
>> Date: Fri, 08 Jun 2007 11:30:38 -0500
>>
>> two hundred fifty six thousand gigabytes for the 48 bit.
>>
>> I think, sixteen gigas of gigabytes for the 64 bit.
>>
>> A gig is 10 to the 9th and 64 bit address space can handle 10 to the 
>> 18th.
>>
>> Jim
>>
>> Mr. Panzer wrote:
>>> ok so how much ram we talking about?
>>>
>>>
>>> Panzer
>>>
>>>
>>>
>>> 10 second quickie not long enough for you? Try it for 24 hours. 24 
>>> Heures du Mans
>>>
>>>
>>>
>>>
>>>
>>>> From: Thomas Stover <thomas at wsinnovations.com>
>>>> Reply-To: members at lists.bham-lug.org
>>>> To: members at lists.bham-lug.org
>>>> Subject: Re: [BALU] 64 bit systems
>>>> Date: Fri, 08 Jun 2007 10:49:46 -0500
>>>>
>>>> The physical address space is 48 bits, so that limits the amount of 
>>>> real ram in the system. However from a process's point of view the 
>>>> "virtual" address space is 64 bits, and that could still be 
>>>> utilized with file mapping and /or NUMA machines.
>>>>
>>>> jim wrote:
>>>>
>>>>> Is not the address space only 48 bits, 256 terabytes
>>>>> <http://en.wikipedia.org/wiki/Tebibyte>. (I am looking foward to
>>>>> buying 1 terabyte[1000 gigabytes] surplus memory). and the actual 
>>>>> Ram only 40 bit addressing or just 1 terabyte of RA.
>>>>>
>>>>> But the registers and data width are 64 bits are they not.
>>>>>
>>>>> I think the 40 and 48 restrictions are only for memory ops.
>>>>>
>>>>
>>>>
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