Package: mkisofs Version: 4:2.01+01a01-4 Severity: normal
I am using mkisofs via growisofs to burn a dvd backup of a large directory tree. This tree contains 1.8GB worth of data, but more importantly it contains over a hundred thousand (100_000) files with long names. mkisofs has to rename these files and does so issuing reports like the following: Using PPC_XBO1.C__;1 for olinsky/src/c--/qc--/testcc/ppc/ppc-x-mn-1895.c-- (ppc-x-mn-18949.c--) At first these reports emerge quickly, but unfortunately, as time passes, they emerge more and more slowly --- less than one per second. I've done the math; it will take over 27 hours to burn this DVD---and for the entire time, CPU usage for mkisofs will be at least 96%. The problem is that the hash table is too small. If I go into mkisofs/hash.c and change the definition of NR_NAME_HASH to #define NR_NAME_HASH (256*1024) then I get on the order of 100 entries per second, which is much better. In a program that already requires many megabytes of working set, an additional megabyte would not be unreasonable. Of course, the really workmanlike thing to do would be to allocate the hash table dynamically and double its size every time it fills, but that may be more trouble than it's worth. Norman -- System Information: Debian Release: testing/unstable APT prefers testing APT policy: (500, 'testing'), (500, 'stable'), (50, 'unstable') Architecture: i386 (i686) Shell: /bin/sh linked to /bin/bash Kernel: Linux 2.6.11labrador Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968) Versions of packages mkisofs depends on: ii libc6 2.3.5-6 GNU C Library: Shared libraries an ii zlib1g 1:1.2.2-4 compression library - runtime mkisofs recommends no packages. -- no debconf information -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
