Deployment process causes window of missing content.

System

I am having trouble with transactional deployments and the process they appear to do. I have an update to the production content tree of about 4GiG. it appears that the process is as follows

1. copy all the files in the destination directory (destDir) to destDir.iwold
2. copy all the files in the destination directory (destDir) to destDir.iwnew
3. deliver the new files to destDir.iwnew
4. delete all files in destDir
5. copy all files from destDir.iwnew to destDir
6. cleanup destDir.iwnew and destDir.iwold

I am still running tests to confirm this behavior. But with this process I see a window of time that there is missing content in the server content tree. This time is considerable with large content updates.

I am running areadiff's between the staging and the last edition.

I have to have transactional deployments and can not have these windows of missing content.

the config settings are as follows;

areaDiff area="$stagingArea^" previousArea="$lastEdition^"

comparisonRules dateDifferent="no" revert="no" ignoreAcls="no" ignoreModes="no" ignoreUser="no" ignoreGroup="no" checksumCompare="yes"

transferRules doDeletes="yes" dontDo="no" preserveAcls="no" followLinks="no" svrTryDisableOverwrite="no" rmReadOnly="no" compression="no" compressionLevel="1" applySourceFileTime="yes" checksumVerify="no" byteIncremental="no"

Any assistance would be greatly appreciated.