Re: ForCES Protocol Implementation Issues

[" SUBSCRIBE FORCES B. J. Kang " <[e-mail]>]

On Mon, 17 Sep 2007 06:59:24 -0400, Joel M. Halpern 
<[e-mail]> wrote:

>You can get all the property information, if you need to.
>
>However, if a backup CE takes over for a primary, one of the first
>things it HAS to do is to get all the content of the LFB
>tables.  That is because the backup CE needs to know what the FE
>thinks it is doing.  If the new CE has not been coordinating with the
>previous primary, then it will need to get all the info.
>

Thanks for your answer.
If all the value are changed by CE, I agree on your point. But I think that some 
of the values (statistics, events, or ...) may be changed by FE. If so, I don't 
think that it is a good solution about CE getting a copies of FEs.


>Yours,
>Joel
>
>At 10:53 PM 9/16/2007, B. J. Kang wrote:
>> >For every table (array) in a Forces Object there is a properties
>> >object (accessible via the protocol) which includes the first free
>> >table entry, as well as the last used table entry.  So the
>> >information the CE needs is always available.
>> >In fact, since the CE generally created the table, and created the
>> >entries, it is anticipated that the CE will normally have a mirror
>> >copy with any annotation information it wants, obviating the need to
>> >query these fields.
>> >
>>
>>What you mean is that I can get the information about which row is free
>>without getting all the contents of a table to find the index of free rows?
>>
>>If so, when i want to add some things to a table, I must still get
>>some data at
>>first. Isn't it a complicated thing?
>>
>>Because I try to implement Failover, I can not think that Backup CEs have 
the
>>mirror copy of all FEs.