On Tue, Jun 02, 2009 at 08:58:55PM +0200, Tomas Pospisek wrote: > good idea!
thanks. it was the obvious solution when you think about it though. > let's consider what would happen if dlocate would work with compressed > text files instead: yeah, i thought about that on Saturday. Preliminary tests showed that it was about 10 times slower than grepping uncompressed text...and since dlocate's reason for existence is speed, i decided not to use compression. on my main system (a combined workstation/server/dev box/everything box) with 7501 packages installed, /var/lib/dlocate/dlocatedb.txt is 54MB in size. gzip compresses that to around 4.6MB. for me, the instant response of dlocate (~0.04 seconds avg search time) is very much worth the extra disk space used. going back to ~0.4 seconds (first uncached search) or ~0.25 seconds (subsequent searches), there is a noticable delay between hitting enter on the dlocate command and getting the reponse back. maybe i should make compression an option (using config file /etc/default/dlocate). it wouldn't be hard to do something like: GREP="grep" . /etc/default/dlocate [ "$COMPRESS_DLOCATE" = "1" ] && GREP="zgrep" and then replace every instance of grep with $GREP i've got dlocate-1.02 almost ready to go, with a minor man page bug fix and a new feature (list kernel packages). i'll add optional support for compression (turned of by default) before releasing it. * fixed example in dlocate.1 man page again (Closes: #466662) * added '-k', and '-K' commands to list kernels and related packages BTW, the new '-k' option is a replacement for another little script i've been using for years called 'dpkg-list-kernels' ganesh:/usr/local/src/debian/dlocate/dlocate-1.02# ./dlocate -k nvidia-kernel-source linux-image-2.6.28.7 virtualbox-ose-modules-2.6.28.7 linux-image-2.6.29.2 linux-image-2.6.29.1 virtualbox-ose-modules-2.6.29.2 virtualbox-ose-modules-2.6.29.1 nvidia-kernel-common nvidia-kernel-2.6.28.7 nvidia-kernel-2.6.29.2 nvidia-kernel-2.6.29.1 one really good use for it is to remove old kernels and related modules: dlocate -k | egrep '2.6.28|2.6.29.1' | xargs apt-get purge and '-K' is similar to what i used to run as 'dpkg-list-kernels | xargs dpkg -l' ganesh:/usr/local/src/debian/dlocate/dlocate-1.02# ./dlocate -K Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Installed/Config-files/Unpacked/Failed-config/Half-installed |/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad) ||/ Name Version Description +++-=====================================-=====================================-============================================= ii linux-image-2.6.28.7 ganesh.2.6.28.7 Linux kernel binary image for version 2.6.28 ii linux-image-2.6.29.1 ganesh.2.6.29.1 Linux kernel binary image for version 2.6.29 ii linux-image-2.6.29.2 ganesh.2.6.29.2 Linux kernel binary image for version 2.6.29 ii nvidia-kernel-2.6.28.7 180.29-1+ganesh.2.6.28.7 NVIDIA binary kernel module for Linux 2.6.28 ii nvidia-kernel-2.6.29.1 180.44-2+ganesh.2.6.29.1 NVIDIA binary kernel module for Linux 2.6.29 ii nvidia-kernel-2.6.29.2 180.44-2+ganesh.2.6.29.2 NVIDIA binary kernel module for Linux 2.6.29 ii nvidia-kernel-common 20080825+1 NVIDIA binary kernel module common files ii nvidia-kernel-source 180.44-2 NVIDIA binary kernel module source ii virtualbox-ose-modules-2.6.28.7 2.1.4-dfsg-1+ganesh.2.6.28.7 VirtualBox modules for Linux (kernel 2.6.28. ii virtualbox-ose-modules-2.6.29.1 2.2.0-dfsg-1+ganesh.2.6.29.1 VirtualBox modules for Linux (kernel 2.6.29. ii virtualbox-ose-modules-2.6.29.2 2.2.2-dfsg-2+ganesh.2.6.29.2 VirtualBox modules for Linux (kernel 2.6.29. craig -- craig sanders <c...@taz.net.au> One man's theology is another man's belly laugh. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
