gcc -Wall -O2 -shared -fPIC -o libxattr.so libxattr.c -lsqlite3
This intercepts calls from rsync that deal with extended attributes.
If the target is a symlink (where linux doesn't allow xattrs on
symlinks) or the xattr is user.com.apple.ResourceFork (ext3 has a
limit of 4k attributes), the extended attribute is redirected into an
sqlite3 database. Otherwise, the extended attribute is set using the
native filesystem calls. There is a performance penalty to this
library as it causes a stat() on each extended attribute system call.
When sqlite3 writes many attributes there is also substantial slow-down.
Start rsync like this:XATTR_LOG=/tmp/xattr.log XATTR_DB=/var/whatever/xattr.db LD_PRELOAD=.../libxattr.so rsync <options>
libxattr.c
Description: Binary data
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