* [9fans] history question ("Athena's OldFiles") @ 2006-05-13 3:01 Dave Eckhardt [not found] ` <B69F441D-E7C3-4BA5-A927-6EE1868EFFD3@mit.edu> 0 siblings, 1 reply; 2+ messages in thread From: Dave Eckhardt @ 2006-05-13 3:01 UTC (permalink / raw) To: 9fans According to http://cm.bell-labs.com/plan9/about.html: Slowly, ideas from Plan 9 are being adopted by other systems. [...] The dump file system has been mimicked in Athena's OldFiles directories or Network Appliance's .snapshot directories. I don't know much about Athena, but I believe OldFiles has been the name for "yesterday's read-only snapshot" in AFS since the mid 1980's. The snapshot is mentioned, although not by name, in Section 6.5 ("Backup") of "Scale and Performance in a Distributed File System" (Howard et al., ACM TOCS, Feb. 1988), which documents AFS as of early 1987. My vague understanding, which could be wrong, is that in the late 80's or early 90's, there was cross-fertilization when Athena switched from NFS to AFS, and AFS switched from home-grown authentication to Kerberos. If so the appearance of OldFiles at MIT may well be after, but not caused by, the Plan 9 WORM file server's dump tree. Dave Eckhardt ^ permalink raw reply [flat|nested] 2+ messages in thread
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* Re: [9fans] history question ("Athena's OldFiles") [not found] ` <B69F441D-E7C3-4BA5-A927-6EE1868EFFD3@mit.edu> @ 2006-06-02 16:31 ` chad brown 0 siblings, 0 replies; 2+ messages in thread From: chad brown @ 2006-06-02 16:31 UTC (permalink / raw) To: Fans of the OS Plan 9 from Bell Labs In case anyone cares... Athena started using AFS in the late 80's, and switched mostly wholesale in the early 90's. OldFiles comes directly from that time. Athena was using Kerberos authentication in AFS right from the start -- and I believe is still using the home-grown Kerberos support, not the stuff that CMU added to AFS shortly thereafter. *chad On May 12, 2006, at 11:01 PM, Dave Eckhardt wrote: > According to http://cm.bell-labs.com/plan9/about.html: > Slowly, ideas from Plan 9 are being adopted by other systems. > [...] The dump file system has been mimicked in Athena's > OldFiles directories or Network Appliance's .snapshot > directories. > > I don't know much about Athena, but I believe OldFiles > has been the name for "yesterday's read-only snapshot" > in AFS since the mid 1980's. The snapshot is mentioned, > although not by name, in Section 6.5 ("Backup") of > "Scale and Performance in a Distributed File System" > (Howard et al., ACM TOCS, Feb. 1988), which documents > AFS as of early 1987. > > My vague understanding, which could be wrong, is that > in the late 80's or early 90's, there was cross-fertilization > when Athena switched from NFS to AFS, and AFS switched > from home-grown authentication to Kerberos. If so the > appearance of OldFiles at MIT may well be after, but not > caused by, the Plan 9 WORM file server's dump tree. > > Dave Eckhardt ^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2006-06-02 16:31 UTC | newest] Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2006-05-13 3:01 [9fans] history question ("Athena's OldFiles") Dave Eckhardt [not found] ` <B69F441D-E7C3-4BA5-A927-6EE1868EFFD3@mit.edu> 2006-06-02 16:31 ` chad brown
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