Hi, On Sun, 17 Jan 2010 16:24:30 +0900, Jiro SEKIBA <jir@xxxxxxxxx> wrote: > Hi, John > > I realized that you might not in the linux-nilfs ML. > Since nilfs-users are alread closed, I resent the mail > just in case your are not in the list.p Thanks. The old list was closed as Sekiba-san noted. > At Sun, 10 Jan 2010 17:56:41 +0900, > Jiro SEKIBA wrote: > > > > Hi, John > > > > If I understand what you wnat to do correctly, > > you may be able to write a script using the lscp, mkcp and rmcp. > > > > To create a snapshot, just invoke "mkcp -s" at an interval of "X" > > minutes, as you mentioned. > > Largly agreed. We think snapshot management is a separate task for now, and are not integrating it in cleanerd. Although we can consider such integration, I think the current functional decomposition is safer because the garbage collection is so delicate; if we enbug cleanerd, it directly leads to a filesystem corruption. On the other hand, flexibility of checkpoints/snapshots management is a reason of the userland cleaner implementation. So, I don't deny the proposal either. Maybe, some sort of framework helping the snapshot management should be provided after working out priority issues in cleanerd which have been reported in this list. > > To remove snapshot over the lifetime of "Y", parse the out put of lscp > > and rmcp. I don't think this is a big problem. To be precise, rmcp doesn't work for snapshots. 'chcp cp' is used to revert snapshots to checkpoints before their removal. > > here are the simple bash script to display snapshot number > > that is older than LIFETIME secs > > > > --------------rmss.sh-------------- > > #!/bin/bash > > > > LIFETIME=86400 # 60 * 60 * 24 sec, a day > > NOW=$(date +%s) #epoch time > > TMP=/tmp/$$.ss > > `lscp | grep ss |cut -b-41 > $TMP` Snapshots can be listed with 'lscp -s'. So, this can be simplified to: `lscp -s |cut -b-41 > $TMP` I feel this feature of lscp is much convenient though it's often unnoticed. > > > while read line;do > > ssno=$(echo -n $line | cut -d' ' -f1) > > sstime=$(echo -n $line | cut -d' ' -f2-) > > ssepoch=$(date -d"$sstime" +%s) > > t=$((ssepoch+$LIFETIME)) > > > > if [ $NOW -gt $t ];then > > echo check point $ssno is older than $LIFETIME secs1 > > fi > > done <$TMP > > > > rm -f $TMP > > --------------rmss.sh-------------- > > > > I agree that higher level utility may help the daily works as you said, > > however I'm not sure if it's the right way to integrate those tools low > > level utils like nilfs-utils package. > > > > Thanks > > > > regards, > > -- > > Jiro SEKIBA <jir@xxxxxxxxx> > > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html Cheers, Ryusuke Konishi -- To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
