Synametrics Technologies

My harddisk contains some very big TrueCrypt containers. I noticed that delta backups are preceded by some painful time-consuming tasks, maybe repetitive encryption before exchanging delta compare information. Discussion to defeat the root cause would be worth a thread on its own. Anyway I'd like to select which files get encrypted and which do not. In this case simply something like "no encryption for *.tc" files.

Hi, I see the same with huge PST files. IMHO the reason is that (for safety reasons) the destination file is not patched but completely re-written and afterwards replaced (just my guessing). I see heavy disk load on the server when patching 1MB for/in a 4GB file. So my feature request was: Make a pure backup server available by giving an option just to write down the diff file on the server instead of patching. Or give an option to patch directly instead of re-writing the whole file (maybe only when filesize > X). Thank you, Frank

Thomas, The easiest way to accomplish this is to create two profiles. One with encryption and the other without. You can use a Selection Filter to include/exclude files from the profile. See http://web.synametrics.com/SyncrifySelFitler.htm for details. Regards, Imran.

Frank, There are two possibilities for patching when a delta is sent from the client: 1 - Delta contains new data that needs to be appended at the end 2 - File on the server must be patched somewhere in the middle The first case scenario is very fast and does not require the entire file to be rewritten. In the second case, Syncrify rebuilds the file in the TEMP folder, confirms its integrity by comparing MD5 signatures and then moves it to the final destination. In this case, there is no choice but to rewrite the entire file. You cannot insert a 1MB block of data at particular file location without shifting the remaining data 1 MB over. Regards, Imran.