Chucks notes and stuff - filesystems

cachefilesd

Anonymous (anonymous@undisclosed.example.com) — 2020-02-24T10:16:01+00:00

Cachefilesd for Network filesystems 10 GB Cache dd if=/dev/zero of=/var/cache/loopback.img bs=1M count=10000 mkfs.ext3 -m 0 /var/cache/loopback.img /etc/fstab entry /var/cache/loopback.img /var/cache/fscache ext3 loop,auto,defaults,user_xattr 0 0

csync2_install

Anonymous (anonymous@undisclosed.example.com) — 2020-02-24T10:16:01+00:00

Installing Csync2 Csnyc2 is really cool. The problem is getting it up and running. Due to very bad documentation there is some info that is just not very well explained. So here we go. a step by step for getting csync2 installed with SSL support. As always see if the package is available in the repo first. In this case it is so a simple apt-get works to get csync2 installed on the system:

csync2_is_so_cool

Anonymous (anonymous@undisclosed.example.com) — 2020-02-24T10:16:01+00:00

"csync2 is so cool" by Zhenhui Liang This article was originally a blog entry by Zhenhui Liang back in 2006 that covered one of the early releases of csync2. The install and configuration portions of the article are quite a bit dated but there is some nice information that can come in handy in the piece.

ext3grep

Anonymous (anonymous@undisclosed.example.com) — 2020-02-24T10:16:01+00:00

Recovering files with ext3grep Just so you know. File recovery on a live partition with ext3grep is possible. Depending upon the amount of activity on the system will of course have a major impact on the feasibility of such an attempt. Getting Started..

glusterfs_arm_install

Anonymous (anonymous@undisclosed.example.com) — 2020-02-24T10:16:01+00:00

Installing GlusterFS on an ARM box GlusterFS is really a nice solution for those of us that would like a bit more flexibility in network storage solutions. I recently did a GlusterFS install on a QNAP TS-412U ARM based NAS. A really nice box that offers a LOT of extras.

glusterfs_diamond_metrics

Anonymous (anonymous@undisclosed.example.com) — 2020-02-24T10:16:01+00:00

GlusterFS Diamond Collector The initial test version of this collector. It is a quick hack to verify that I can get the metrics into influxdb/grafana/graphite. The next version will be using the XML output of the gluster utility to gather the metrics.

iwatch_install

Anonymous (anonymous@undisclosed.example.com) — 2020-02-24T10:16:01+00:00

Installing and configuring IWatch * apt-get install iwatch * /etc/iwatch/iwatch.xml: Operating System /bin /sbin /u…

lvm2_install

Anonymous (anonymous@undisclosed.example.com) — 2020-02-24T10:16:01+00:00

Installing LVM2 Loading the LVM2 module # modprobe dm-mod Before scanning and activating LVM, you might want to edit /etc/lvm/lvm.conf to exclude some devices. By default, LVM2 will scan all devices, even your CDROM which can generate error messages. In the following example, the line that allows scanning of all devices is replaced by one that rejects every device but our two IDE disks.

using_lsyncd_and_csync2

Anonymous (anonymous@undisclosed.example.com) — 2020-02-24T10:16:01+00:00

Lsyncd wrapper usage: lsyncdwrap #!/bin/sh STATFILE=$1 shift CMDLINE=$@ if [ -s $STATFILE ]; then exit 0 fi START=`date +%s` $CMDLINE >> $STATFILE 2>&1 ERR=$? END=`date +%s` DIFF=$(($END - $START)) # append to STATFILE if [ $ERR -ne 0 ]; then echo "### ERROR: `date` ### TIME [$DIFF] - ARGS: $@" >> $STATFILE else echo -n "" > $STATFILE fi exit 0

wipe_drive

Anonymous (anonymous@undisclosed.example.com) — 2020-02-24T10:16:01+00:00

Howto Wipe your drives or partitions From time to time you will need to wipe a drive or partion and here are the best ways to do it. The quick and easy way The fastest way is to simply write a bunch of zeros to the drive so: dd if=/dev/zero of=/dev/sda bs=1M