Did Cray computers use virtual memory?

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I found a mention on page 777 of the Second Edition of the book "Computer Systems: a programmer's perspective" [Bryant - O'Hallaron] stating that Cray supercomputers still do not use virtual memory (please note that the book is from 2011).



I searched an found this quote attributed to Saymour Cray (see Wikiquote -and also Hakersays-) on virtual memory:




Memory is like an orgasm. It's a lot better if you don't have to fake it.




So my question is actually two questions:



  1. Did Cray supercomputers start using VM at some point?

  2. If answer to 1 is "yes", which one was the last one that did not use VM?





cray virtual-memory







share|improve this question



















  • 1




    Could you clarify question 1? In my English at least, it's ambiguous as to whether you mean to ask if "none used vm", or "not all used vm".
    – Wilson
    1 hour ago










  • Thanks @Wilson, I edited it. Please feel free to do further edits (since I'm not an English native speaker).
    – nbloqs
    58 mins ago











  • If you are asking for proof that Cray machines used VM after your 2011 quote, you're probably in the wrong place.
    – tofro
    44 mins ago










  • @tofro: Not at all, I just want to know if older ones used, but I know Crays are still in production, so I understand if this crosses the line of "retro".
    – nbloqs
    42 mins ago















up vote
5
down vote

favorite












I found a mention on page 777 of the Second Edition of the book "Computer Systems: a programmer's perspective" [Bryant - O'Hallaron] stating that Cray supercomputers still do not use virtual memory (please note that the book is from 2011).



I searched an found this quote attributed to Saymour Cray (see Wikiquote -and also Hakersays-) on virtual memory:




Memory is like an orgasm. It's a lot better if you don't have to fake it.




So my question is actually two questions:



  1. Did Cray supercomputers start using VM at some point?

  2. If answer to 1 is "yes", which one was the last one that did not use VM?





cray virtual-memory







share|improve this question



















  • 1




    Could you clarify question 1? In my English at least, it's ambiguous as to whether you mean to ask if "none used vm", or "not all used vm".
    – Wilson
    1 hour ago










  • Thanks @Wilson, I edited it. Please feel free to do further edits (since I'm not an English native speaker).
    – nbloqs
    58 mins ago











  • If you are asking for proof that Cray machines used VM after your 2011 quote, you're probably in the wrong place.
    – tofro
    44 mins ago










  • @tofro: Not at all, I just want to know if older ones used, but I know Crays are still in production, so I understand if this crosses the line of "retro".
    – nbloqs
    42 mins ago













up vote
5
down vote

favorite









up vote
5
down vote

favorite











I found a mention on page 777 of the Second Edition of the book "Computer Systems: a programmer's perspective" [Bryant - O'Hallaron] stating that Cray supercomputers still do not use virtual memory (please note that the book is from 2011).



I searched an found this quote attributed to Saymour Cray (see Wikiquote -and also Hakersays-) on virtual memory:




Memory is like an orgasm. It's a lot better if you don't have to fake it.




So my question is actually two questions:



  1. Did Cray supercomputers start using VM at some point?

  2. If answer to 1 is "yes", which one was the last one that did not use VM?





cray virtual-memory







share|improve this question















I found a mention on page 777 of the Second Edition of the book "Computer Systems: a programmer's perspective" [Bryant - O'Hallaron] stating that Cray supercomputers still do not use virtual memory (please note that the book is from 2011).



I searched an found this quote attributed to Saymour Cray (see Wikiquote -and also Hakersays-) on virtual memory:




Memory is like an orgasm. It's a lot better if you don't have to fake it.




So my question is actually two questions:



  1. Did Cray supercomputers start using VM at some point?

  2. If answer to 1 is "yes", which one was the last one that did not use VM?





cray virtual-memory




cray virtual-memory






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited 58 mins ago

























asked 1 hour ago









nbloqs

20717




20717







  • 1




    Could you clarify question 1? In my English at least, it's ambiguous as to whether you mean to ask if "none used vm", or "not all used vm".
    – Wilson
    1 hour ago










  • Thanks @Wilson, I edited it. Please feel free to do further edits (since I'm not an English native speaker).
    – nbloqs
    58 mins ago











  • If you are asking for proof that Cray machines used VM after your 2011 quote, you're probably in the wrong place.
    – tofro
    44 mins ago










  • @tofro: Not at all, I just want to know if older ones used, but I know Crays are still in production, so I understand if this crosses the line of "retro".
    – nbloqs
    42 mins ago













  • 1




    Could you clarify question 1? In my English at least, it's ambiguous as to whether you mean to ask if "none used vm", or "not all used vm".
    – Wilson
    1 hour ago










  • Thanks @Wilson, I edited it. Please feel free to do further edits (since I'm not an English native speaker).
    – nbloqs
    58 mins ago











  • If you are asking for proof that Cray machines used VM after your 2011 quote, you're probably in the wrong place.
    – tofro
    44 mins ago










  • @tofro: Not at all, I just want to know if older ones used, but I know Crays are still in production, so I understand if this crosses the line of "retro".
    – nbloqs
    42 mins ago








1




1




Could you clarify question 1? In my English at least, it's ambiguous as to whether you mean to ask if "none used vm", or "not all used vm".
– Wilson
1 hour ago




Could you clarify question 1? In my English at least, it's ambiguous as to whether you mean to ask if "none used vm", or "not all used vm".
– Wilson
1 hour ago












Thanks @Wilson, I edited it. Please feel free to do further edits (since I'm not an English native speaker).
– nbloqs
58 mins ago





Thanks @Wilson, I edited it. Please feel free to do further edits (since I'm not an English native speaker).
– nbloqs
58 mins ago













If you are asking for proof that Cray machines used VM after your 2011 quote, you're probably in the wrong place.
– tofro
44 mins ago




If you are asking for proof that Cray machines used VM after your 2011 quote, you're probably in the wrong place.
– tofro
44 mins ago












@tofro: Not at all, I just want to know if older ones used, but I know Crays are still in production, so I understand if this crosses the line of "retro".
– nbloqs
42 mins ago





@tofro: Not at all, I just want to know if older ones used, but I know Crays are still in production, so I understand if this crosses the line of "retro".
– nbloqs
42 mins ago











1 Answer
1






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up vote
3
down vote



accepted










This source (of 1999) says




Cray computers, however, never provided a virtual memory system, as Cray designers were convinced that the virtual memory's disadvantages outweight its advantages. They try to provide as large a main memory as possible within the technological constraints prevailing at a given time.







share|improve this answer




















  • Not even the current supercomputers, using Xeon Scalable and NVIDIA hardware (cray.com/products)?
    – nbloqs
    43 mins ago










  • The answer sheds light on what I'm looking for, specially about the reasoning behind the design decision. Thanks a lot!
    – nbloqs
    40 mins ago










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1 Answer
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active

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1 Answer
1






active

oldest

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active

oldest

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active

oldest

votes








up vote
3
down vote



accepted










This source (of 1999) says




Cray computers, however, never provided a virtual memory system, as Cray designers were convinced that the virtual memory's disadvantages outweight its advantages. They try to provide as large a main memory as possible within the technological constraints prevailing at a given time.







share|improve this answer




















  • Not even the current supercomputers, using Xeon Scalable and NVIDIA hardware (cray.com/products)?
    – nbloqs
    43 mins ago










  • The answer sheds light on what I'm looking for, specially about the reasoning behind the design decision. Thanks a lot!
    – nbloqs
    40 mins ago














up vote
3
down vote



accepted










This source (of 1999) says




Cray computers, however, never provided a virtual memory system, as Cray designers were convinced that the virtual memory's disadvantages outweight its advantages. They try to provide as large a main memory as possible within the technological constraints prevailing at a given time.







share|improve this answer




















  • Not even the current supercomputers, using Xeon Scalable and NVIDIA hardware (cray.com/products)?
    – nbloqs
    43 mins ago










  • The answer sheds light on what I'm looking for, specially about the reasoning behind the design decision. Thanks a lot!
    – nbloqs
    40 mins ago












up vote
3
down vote



accepted







up vote
3
down vote



accepted






This source (of 1999) says




Cray computers, however, never provided a virtual memory system, as Cray designers were convinced that the virtual memory's disadvantages outweight its advantages. They try to provide as large a main memory as possible within the technological constraints prevailing at a given time.







share|improve this answer












This source (of 1999) says




Cray computers, however, never provided a virtual memory system, as Cray designers were convinced that the virtual memory's disadvantages outweight its advantages. They try to provide as large a main memory as possible within the technological constraints prevailing at a given time.








share|improve this answer












share|improve this answer



share|improve this answer










answered 45 mins ago









tofro

12.1k32570




12.1k32570











  • Not even the current supercomputers, using Xeon Scalable and NVIDIA hardware (cray.com/products)?
    – nbloqs
    43 mins ago










  • The answer sheds light on what I'm looking for, specially about the reasoning behind the design decision. Thanks a lot!
    – nbloqs
    40 mins ago
















  • Not even the current supercomputers, using Xeon Scalable and NVIDIA hardware (cray.com/products)?
    – nbloqs
    43 mins ago










  • The answer sheds light on what I'm looking for, specially about the reasoning behind the design decision. Thanks a lot!
    – nbloqs
    40 mins ago















Not even the current supercomputers, using Xeon Scalable and NVIDIA hardware (cray.com/products)?
– nbloqs
43 mins ago




Not even the current supercomputers, using Xeon Scalable and NVIDIA hardware (cray.com/products)?
– nbloqs
43 mins ago












The answer sheds light on what I'm looking for, specially about the reasoning behind the design decision. Thanks a lot!
– nbloqs
40 mins ago




The answer sheds light on what I'm looking for, specially about the reasoning behind the design decision. Thanks a lot!
– nbloqs
40 mins ago

















 

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