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c1) client can compare datestamp it was just told, with the one it has recorded previously<br />
<br />
or,,,<br />
<br />
b1) server compares datestamp of client record with its own, and takes action accordingly<br />
<br />
Clocks not used in process. Note that none of datestamps concerning files were ever created by client. And I make no claim either for server times, the file(s) could have been prepared by a third party. And it could be the 3rd party clock is only issue, for being synchronized well with anything.
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c1) client can compare datestamp it was just told, with the one it has recorded previously

or,,,

b1) server compares datestamp of client record with its own, and takes action accordingly

Clocks not used in process. Note that none of datestamps concerning files were ever created by client. And I make no claim either for server times, the file(s) could have been prepared by a third party. And it could be the 3rd party clock is only issue, for being synchronized well with anything.

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No comment has been added lately, so it's time to clean up this TA.<br />
I will leave a recommendation in the Cleanup topic area that this question is to:<br />
<br />
Accept SunBow's comments as answer<br />
<br />
Please leave any comments here within the next seven days.<br />
&nbsp;<br />
PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER!<br />
&nbsp;<br />
st_steve<br />
EE Cleanup Volunteer<br />

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No comment has been added lately, so it's time to clean up this TA.
I will leave a recommendation in the Cleanup topic area that this question is to:

Accept SunBow's comments as answer

Please leave any comments here within the next seven days.
 
PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER!
 
st_steve
EE Cleanup Volunteer


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Per recommendation.<br />
<br />
YensidMod<br />
EE Moderator
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Per recommendation.

YensidMod
EE Moderator

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<div class="content wysiwyg-content">
we already know that a client cache manager knows if a file in its cache is still up to date. the method suggest was to contact the server and have the server compare the client and server times. <br />
<br />
<br />
SO my question is :<br />
<br />
Does this method fail if the client and server clocks are very different? 
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we already know that a client cache manager knows if a file in its cache is still up to date. the method suggest was to contact the server and have the server compare the client and server times. 


SO my question is :

Does this method fail if the client and server clocks are very different? 

CACHE memory/consistency problem

Operating systems perform basic tasks, such as recognizing input from the keyboard, sending output to the display screen, keeping track of files and directories on the disk, and controlling peripheral devices such as disk drives and printers. For large systems, the operating system makes sure that different programs and users running at the same time do not interfere with each other. The operating system is also responsible for security, ensuring that unauthorized users do not access the system. Operating systems provide a software platform on top of which other programs, called application programs, can run.