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File synchronization: moving away from incremental backup (HELP!)

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f0dder:
SFFS delta backup probably has to read through the entire file to check which range(s) have changed... that's take some time. But I haven't read up on how it does it, so it's just a guess :)
-f0dder (November 10, 2007, 05:05 PM)
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SFFS cuts the file in smaller parts, performs CRC on a part, same on the target file, and if CRCs differ, this part is updated, and so on.  When target is on a remote server, CRC is performed locally by a Windows service dedicated, so no big data transfer is required.
-MerleOne (November 22, 2007, 02:09 PM)
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Smart - but still requires a lot of processing, compared to filter driver approach.

MerleOne:
SFFS delta backup probably has to read through the entire file to check which range(s) have changed... that's take some time. But I haven't read up on how it does it, so it's just a guess :)
-f0dder (November 10, 2007, 05:05 PM)
--- End quote ---
SFFS cuts the file in smaller parts, performs CRC on a part, same on the target file, and if CRCs differ, this part is updated, and so on.  When target is on a remote server, CRC is performed locally by a Windows service dedicated, so no big data transfer is required.
-MerleOne (November 22, 2007, 02:09 PM)
--- End quote ---
Smart - but still requires a lot of processing, compared to filter driver approach.
-f0dder (November 22, 2007, 02:14 PM)
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Actually it is quite fast and doesn't seem to take that much resources, except maybe HDD access.  Some years ago, Laplink used the same technique to update big files across modem links and it was quite effective, and computing power at that time was so much lower. Anyway, the best would be to test it in the real environment and see how it performs.

steeladept:
At work we use Tivoli Storage Manager for this type of thing.  I don't know much about it other than it is an effective and transparent way to backup specified files once it is set up.  I believe it is free too, though don't quote me on that.  For some reason I believe it is an IBM product now though.  At any rate, it is definitely something that will handle every requirement you have, as long as the price is right.

Armando:
There were some stuff about Tivoli there :
https://www.donationcoder.com/forum/index.php?topic=7940.msg61084#msg61084

Here you can a comparison between the different Tivoli products :

http://www-111.ibm.com/software/dre/hmc/compare.wss?HMC02=C136879G75391P17

Here are the details for Tivoli Storage Manager :

http://www-306.ibm.com/software/tivoli/products/storage-mgr/

And the pricing :

https://www-112.ibm.com/software/howtobuy/buyingtools/paexpress/Express?P0=E1&part_number=D56FULL,D5158LL,D56FPLL,D51MYLL,D56FLLL,D56FSLL,D56Q3LL,D56D9LL,D56D7LL,D55H5LL,D56Q5LL,D54Q1LL,&catalogLocale=en_US&Locale=en_US&country=USA&S_TACT=none&S_CMP=none


Seems interesting... It's even multi-platform : Windows, Linux, HP Unix, Sun Solaris, AIX.

f0dder:
Tivoli has been IBM for, like, forever - at least as long as I can remember (which isn't more than max 5 years though  :-[ ).

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