I have been advocating a "write through" approach to data replication. It works well when data is only read but not updated. Distributed updates are harder, probably requiring a 2- or 3-phase commit, even with just two systems.
Of course, an interesting question is: Where does this kind of functionality belong? I'm not sure applications ought to be worrying about the details of data replication and synchronization of updates. --- Joseph Dal Molin <[EMAIL PROTECTED]> wrote: > Perhaps the glass is half fulll....couldn't BCMA functionality be > extended to address the rest of the data and patient popn'?? > > smcphelan wrote: > > Bhaskar's suggestion would be a nice solution if that is what BCMA > does. > > The BCMA backup program does not relay all relevant information for > the EHR > > for that patient. It only backups up that data that is relevant > for the > > function of giving medication to inpatients only, not all patients. > So it > > has a very limited scope and a restricted subset of patients. > > > > VistA does not have a national solution for backing up the EHR in a > form > > that is useable in the case when the VistA servers are unavailable > for > > whatever reason. > > > > ----- Original Message ----- > > From: "Cable One" <[EMAIL PROTECTED]> > > To: <hardhats-members@lists.sourceforge.net> > > Sent: Thursday, May 12, 2005 10:18 AM > > Subject: [Hardhats-members] RE: Slow CPRS performance over VPN > > > > > > > >>Bhaskar's suggestion will solve the problem nicely. Moves all of > the time > >>critical traffic to the lan and uses the wan for replication of the > data > > > > to > > > >>another site. It does involve the costs associated with another > server, > > > > but > > > >>that is really low these days. > >> > >>Using UDP for a VPN does not really solve the problem, it just > moves the > >>problems of data integrity / verification up to the application > level > > > > where > > > >>the programmer may or may not do as good a job as the TCP stack. > >> > >>Best regards, > >> > >>Donald R. Donigan > >>donigan technology, LLC dba > >>Desert CODE Works > >>[EMAIL PROTECTED] > >>[EMAIL PROTECTED] > >> > >> > >> > >>-- > >>No virus found in this outgoing message. > >>Checked by AVG Anti-Virus. > >>Version: 7.0.308 / Virus Database: 266.11.8 - Release Date: > 5/10/2005 > >> > >> > >> > >>------------------------------------------------------- > >>This SF.Net email is sponsored by Oracle Space Sweepstakes > >>Want to be the first software developer in space? > >>Enter now for the Oracle Space Sweepstakes! > >>http://ads.osdn.com/?ad_id=7393&alloc_id=16281&op=click > >>_______________________________________________ > >>Hardhats-members mailing list > >>Hardhats-members@lists.sourceforge.net > >>https://lists.sourceforge.net/lists/listinfo/hardhats-members > >> > > > > > > > > > > > > ------------------------------------------------------- > > This SF.Net email is sponsored by Oracle Space Sweepstakes > > Want to be the first software developer in space? > > Enter now for the Oracle Space Sweepstakes! > > http://ads.osdn.com/?ad_id=7393&alloc_id=16281&op=click > > _______________________________________________ > > Hardhats-members mailing list > > Hardhats-members@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/hardhats-members > > > > . > > > > > ------------------------------------------------------- > This SF.Net email is sponsored by Oracle Space Sweepstakes > Want to be the first software developer in space? > Enter now for the Oracle Space Sweepstakes! > http://ads.osdn.com/?ad_id=7393&alloc_id=16281&op=click > _______________________________________________ > Hardhats-members mailing list > Hardhats-members@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/hardhats-members > A practical man is a man who practices the errors of his forefathers. --Benjamin Disraeli ==== Greg Woodhouse [EMAIL PROTECTED] [EMAIL PROTECTED] ------------------------------------------------------- This SF.Net email is sponsored by Oracle Space Sweepstakes Want to be the first software developer in space? Enter now for the Oracle Space Sweepstakes! http://ads.osdn.com/?ad_id=7393&alloc_id=16281&op=click _______________________________________________ Hardhats-members mailing list Hardhats-members@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/hardhats-members
