Re: [Jfilesync-news] memory usage

[Erich M. <ma...@er...>]

I believe I've encountered a similar problem in the past, though I can't
recall if I got the Out of Memory error or whether the program just locked
up. I know with certainty that I've observed the latter.

I was syncing several directories that were each fairly large and contained
a lot of files. My solution was to make a couple of different profiles and
run each separately. It's kind of annoying, but it gets the job done.

Interestingly, it seemed to have more of a tendency to lock up on OSX than
on my XP Home install. Both PCs have 1GB ram. I think the cause of this
might have been that I was backing up my entire Library folder, which
consists of far too many files.

Hope this information helps.

Erich Musick
http://erichmusick.com


-----Original Message-----
From: jfi...@li...
[mailto:jfi...@li...] On Behalf Of Stefan
Hermanek
Sent: Wednesday, December 12, 2007 11:52 AM
To: jfi...@li...
Subject: [Jfilesync-news] memory usage

i tried JFileSync last day and this is what i experienced:

windows2000, sp4, 1gb ram, java 1.5

source directory: 167.000 files
target directory: already 164.000 files from an old backup of the source

i started JFileSync with java -Xmx256m -jar \lib\jfsync.jar

aprox. 4000 files were deleted in the target directory and 5000 new files
copied to it.
one second after the last copied file JFileSyn termineated with a
OutOfMemoryError: java heap space.
the task manager showed 370mb of memory for the java process.

then i tried to synchronize a directory of aprx. 36.000 files with an
empty target directory: java used 370mb of memory. why is so much memory
needed just for copying files?

then i did another synchronization with 10.000 files to an empty
directory: used memory raised to 600mb (i don't know how java can do this
with the -Xmx256m option?).
after some repeated compare actions of the just synchronized directories
java ended up with 656mb and another OutOfMemoryError.

i like JFileSync because of its clear user interface, but is there a way
to get along with such a number of files and a reasonable memory usage?

btw, is it possible to exclude a directory pair from beeing
compared/synchronized in a profile without deleting it?

thanx, stefan



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