Re: [zfs-discuss] zfs inotify?

[Trevor Pretty]

Paul Being a script hacker like you the only kludge I can think of. A script that does something like ls > /tmp/foo sleep ls /tmp/foo.new diff /tmp/foo /tmp/foo.new > /tmp/files_that_have_changed mv /tmp/foo.new /tmp/foo Or you might be able to knock something up with bart nd zfs snapshots. I did write this which may help????? #!/bin/sh #set -x # Note: No implied warranty etc. applies. #       Don't cry if it does not work. I'm an SE not a programmer! # ################################################################### # # Version 29th Jan. 2009 # #     GOAL: Show what files have changed between snapshots # #     But of course it could be any two directories!! # ################################################################### # ## Set some variables # SCRIPT_NAME=$0 FILESYSTEM=$1 SNAPSHOT=$2 FILESYSTEM_BART_FILE=/tmp/filesystem.$$ SNAPSHOT_BART_FILE=/tmp/snapshot.$$ CHANGED_FILES=/tmp/changes.$$ ## Declare some commands (just in case PATH is wrong, like cron) # BART=/bin/bart ## Usage # Usage() {         echo ""         echo ""         echo "Usage: $SCRIPT_NAME -q filesystem snapshot "         echo ""         echo " -q will stop all echos and just list the changes"         echo ""         echo "Examples"         echo "    $SCRIPT_NAME /home/fred    /home/.zfs/snapshot/fred "         echo "    $SCRIPT_NAME .             /home/.zfs/snapshot/fred "            echo ""         echo ""         exit 1 } ########### Main Part ################### ## Check Usage # if [ $# -ne 2 ]; then     Usage fi ## Check we have different directories # if [ "$1" = "$2" ]; then     Usage fi ##  Handle dot # if [ "$FILESYSTEM" = "." ]; then     cd $FILESYSTEM ; FILESYSTEM=`pwd` fi if [ "$SNAPSHOT" = "." ]; then     cd $SNAPSHOT ; SNAPSHOT=`pwd` fi ## Check the filesystems exists It should be a directory #  and it should have some files # for FS in "$FILESYSTEM" "$SNAPSHOT" do     if [ ! -d "$FS" ]; then         echo ""         echo "ERROR file system $FS does not exist"         echo ""         exit 1     fi        if [ X"`/bin/ls "$FS"`" = "X" ]; then         echo ""         echo "ERROR file system $FS seems to be empty"         exit 1         echo ""     fi done ## Create the bart files # echo "" echo "Creating bart file for $FILESYSTEM can take a while......" cd "$FILESYSTEM" ; $BART create -R . > $FILESYSTEM_BART_FILE echo "" echo "Creating bart file for $SNAPSHOT can take a while......" cd "$SNAPSHOT" ; $BART create -R . > $SNAPSHOT_BART_FILE ## Compare them and report the diff # echo "" echo "Changes...." echo "" $BART compare -p $FILESYSTEM_BART_FILE $SNAPSHOT_BART_FILE | awk '{print $1}' > $CHANGED_FILES /bin/more $CHANGED_FILES echo "" echo "" echo "" ## Tidy kiwi # /bin/rm $FILESYSTEM_BART_FILE /bin/rm $SNAPSHOT_BART_FILE /bin/rm $CHANGED_FILES exit 0 Paul Archer wrote: 5:12pm, Cyril Plisko wrote: Question: Is there a facility similar to inotify that I can use to monitor a directory structure in OpenSolaris/ZFS, such that it will block until a file is modified (added, deleted, etc), and then pass the state along (STDOUT is fine)? One other requirement: inotify can handle subdirectories being added on the fly. So if you use it to monitor, for example, /data/images/incoming, and a /data/images/incoming/100canon directory gets created, then the files under that directory will automatically be monitored as well. while there is no inotify for Solaris, there are similar technologies available. Check port_create(3C) and gam_server(1) I can't find much on gam_server on Solaris (couldn't find too much on it at all, really), and port_create is apparently a system call. (I'm not a developer--if I can't write it in BASH, Perl, or Ruby, I can't write it.) I appreciate the suggestions, but I need something a little more pret-a-porte. Does anyone have any dtrace experience? I figure this could probably be done with dtrace, but I don't know enough about it to write a dtrace script (although I may learn if that turns out to be the best way to go). I was hoping that there'd be a script out there already, but I haven't turned up anything yet. Paul _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss www.eagle.co.nz  This email is confidential and may be legally privileged. If received in error please destroy and immediately notify us.

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