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Unlikely in real life...
Posted: 19 Jun 2014 12:49
by zer0
Code: Select all
v14.20.0201 - 2014-06-18 14:00
+ Backup / Custom Copy: Added a new condition for the behavior on name
collisions: "Overwrite if different size or date". Date here refers to the
modified date.
This setting provides a pretty good way to copy only what is different and
skip the rest. Helps maximizing the lifetime of your SSD, and generally
speeds up copy jobs.
Note: Since the actual contents of the files are not compared (for
performance reasons) there is the slight chance that two files with the
same size and modified date still have different contents. But that should
be quite unlikely in real life.
...
May I ask how you quantify "quite unlikely in real life"? Just for fun, I did a search against some of my data and found over 30 files (in pairs or groups of 3-4) that share the same size and modified date. Granted, this represents less than 1% of the data set searched, but the sheer fact that I was able to find some files like that so easily makes me doubt just how unlikely it actually is.
Re: Unlikely in real life...
Posted: 19 Jun 2014 12:52
by admin
But do those files also have the same name AND different contents?
Re: Unlikely in real life...
Posted: 19 Jun 2014 14:49
by SkyFrontier
Why not having a "make a copy of files with different size and/or date" strategy, allowing them to have user defined filename affixes? This way they could be easily spotted and user decides what to do with copies or originals...
Re: Unlikely in real life...
Posted: 19 Jun 2014 16:12
by zer0
admin wrote:But do those files also have the same name AND different contents?
Not the same name and different contents, no, but it does not follow exponentially.
Re: Unlikely in real life...
Posted: 19 Jun 2014 16:26
by admin
Whatever, if for some reason you think "Overwrite if different size or date" is not good enough for you, then don't use it. Simply use "Overwrite" do be 100% safe that each single byte is updated in the target location.
Re: Unlikely in real life...
Posted: 19 Jun 2014 16:27
by Stef123
Trying to understand in what respect the new options deviate: Does XY take the content of compared files into consideration with any of the older choices? Select Matches? That based on content?
Re: Unlikely in real life...
Posted: 19 Jun 2014 16:30
by admin
No, none of it compares content. "Matches" is just Name matches.
Re: Unlikely in real life...
Posted: 19 Jun 2014 16:49
by Stef123
What I expected.
IMO, there is no perfect solution that covers every conceivable incident. I better not get started on Daylight Saving Time and FAT32 vs NTFS and all those time stamp issues.
I am glad to have this new additional choice - a humongous time saver compared to Overwrite All.
