Re: Freeze
This WebDNA talk-list message is from 2003
It keeps the original formatting.
numero = 47715
interpreted = N
texte = Hi, I'm comming back with my freezing problem.The exact historic is that I was using Mac OS9.1 Web*4.5 Webcatalog 4.5I tried every thing I new to solve this freezing problem.As I was not fixing the problem I tried to come back to Mac OS8.6 Web*4.4 Webcatalog 4.0 Formating the HDThought it might solved the problem.It did'nt workI have tried 3 differents Virus Software no virus found I have zapped the PRAM but my version of TechTool doesn't zapp the PRAMI also tried to get the server running without Web*Mail and without Webcat So I don't think the problem is coming from WebcatThe problem still existHow else can I do!!!Thank's For helpLawrence le 11/02/03 3:54, Kenneth Grome à kengrome@webdna.net a écrit :>>> Do I really have to download the entire webdna 4.5.1 package simply >>> to read the change history? >>> >>> If not, then why isn't there a link to the change history in a >>> prominent place in the developer resource center? >> >> The Change History is in the Command Reference Section-Appendix C >> http://webdnadocs.smithmicro.com/WebDNA%20Change%20History.html > > > Yes, it's in the section entitled WebDNA 4.5.1 Language Reference > which is misleading but nevertheless it's in there. And here's what > it says about this new feature: > > New 'Safe-Write' preference - Enabled by default. When enabled, the > WebDNA engine creates a temporary file when writing the contents of a > database to disk. The temporary file contents are then moved to the > original database file after the entire database is completely > flushed to disk. This helps to eliminate corruption of the original > database file if there is an interruption during the database write > process. > > In other words, instead of just writing the changes to RAM or to a > single disk file, this new preference does the following: > > 1- closes a db upon every append, replace and delete > 2- writes a new temporary db file to disk > 3- deletes the original db file > 4- renames the temporary file to the original db file name > > And of course since the original db file has been deleted and another > file has taken its place, the new file is not yet open in webdna's > RAM cache ... so it takes additional time for the new db file to be > opened before any visitor can use it. > > And if the request that opens the closed db file is an append, > replace or delete, the file will be immediately closed and replaced > again -- thus eliminating all the benefits of RAM-caching of data. > > Clearly this takes a lot more time than the old way of writing to a > db, especially with large db files and slow OS's ... > > > Sincerely, > Kenneth Grome > > --------------------------------------------------- > WebDNA Professional Training and Development Center > 175 J. Llorente Street +63 (32) 255-6921 > Cebu City, Cebu 6000 kengrome@webdna.net > Philippines http://www.webdna.net > --------------------------------------------------- > > ------------------------------------------------------------- > This message is sent to you because you are subscribed to > the mailing list
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Hi, I'm comming back with my freezing problem.The exact historic is that I was using Mac OS9.1 Web*4.5 Webcatalog 4.5I tried every thing I new to solve this freezing problem.As I was not fixing the problem I tried to come back to Mac OS8.6 Web*4.4 Webcatalog 4.0 Formating the HDThought it might solved the problem.It did'nt workI have tried 3 differents Virus Software no virus found I have zapped the PRAM but my version of TechTool doesn't zapp the PRAMI also tried to get the server running without Web*Mail and without Webcat So I don't think the problem is coming from WebcatThe problem still existHow else can I do!!!Thank's For helpLawrence le 11/02/03 3:54, Kenneth Grome à kengrome@webdna.net a écrit :>>> Do I really have to download the entire webdna 4.5.1 package simply >>> to read the change history? >>> >>> If not, then why isn't there a link to the change history in a >>> prominent place in the developer resource center? >> >> The Change History is in the Command Reference Section-Appendix C >> http://webdnadocs.smithmicro.com/WebDNA%20Change%20History.html > > > Yes, it's in the section entitled WebDNA 4.5.1 Language Reference > which is misleading but nevertheless it's in there. And here's what > it says about this new feature: > > New 'Safe-Write' preference - Enabled by default. When enabled, the > WebDNA engine creates a temporary file when writing the contents of a > database to disk. The temporary file contents are then moved to the > original database file after the entire database is completely > flushed to disk. This helps to eliminate corruption of the original > database file if there is an interruption during the database write > process. > > In other words, instead of just writing the changes to RAM or to a > single disk file, this new preference does the following: > > 1- closes a db upon every append, replace and delete > 2- writes a new temporary db file to disk > 3- deletes the original db file > 4- renames the temporary file to the original db file name > > And of course since the original db file has been deleted and another > file has taken its place, the new file is not yet open in webdna's > RAM cache ... so it takes additional time for the new db file to be > opened before any visitor can use it. > > And if the request that opens the closed db file is an append, > replace or delete, the file will be immediately closed and replaced > again -- thus eliminating all the benefits of RAM-caching of data. > > Clearly this takes a lot more time than the old way of writing to a > db, especially with large db files and slow OS's ... > > > Sincerely, > Kenneth Grome > > --------------------------------------------------- > WebDNA Professional Training and Development Center > 175 J. Llorente Street +63 (32) 255-6921 > Cebu City, Cebu 6000 kengrome@webdna.net > Philippines http://www.webdna.net > --------------------------------------------------- > > ------------------------------------------------------------- > This message is sent to you because you are subscribed to > the mailing list . > To unsubscribe, E-mail to: > To switch to the DIGEST mode, E-mail to > > Web Archive of this list is at: http://webdna.smithmicro.com/ ------------------------------------------------------------- This message is sent to you because you are subscribed to the mailing list . To unsubscribe, E-mail to: To switch to the DIGEST mode, E-mail to Web Archive of this list is at: http://webdna.smithmicro.com/
lb Lawrence
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