On Mon, 2006-10-09 at 16:02 -0400, Josef Sipek wrote: > On Mon, Oct 09, 2006 at 09:54:36PM +0200, Mario Giammarco wrote: > > Thanks for quick reply. Unfortunately in this case logrotate is not an > > option. > > Is it possible to update the snapshot not each night but when cache is full? > > The problem is, if you have a 1GB file on the hard disk (which would be a ro > branch for unionfs), whenever you append to it, Unionfs will copy the entire > file into the rw branch, and append the data there. So, with a 4GB flash > disk, all you have to do is append to 8, 512MB files stored on the disk, and > your flash is full.
I was doing work for a while on a "sparse" version of unionfs where instead of copying up the files, it did a versionfs type block based system, where it would create a sparse file on "copyup" and use a bitmap file to determine which blocks were in which files. unfortunately, it was never that stable and it performance sucked (basically only useful for append only things like log files). _______________________________________________ unionfs mailing list [email protected] http://www.fsl.cs.sunysb.edu/mailman/listinfo/unionfs
