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‎README.md

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@@ -68,57 +68,75 @@ log lz4 20M 60M /var/log /opt/log.bind /opt/oldlog
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### It is working?
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```
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pi@raspberrypi:~/zramdrive $ zramctl
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NAME ALGORITHM DISKSIZE DATA COMPR TOTAL STREAMS MOUNTPOINT
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/dev/zram0 lz4 15M 5M 348.4K 772K 1 /var/log
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/dev/zram1 lz4 650.2M 4K 64B 4K 1 [SWAP]
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/dev/zram2 lz4 60M 4.7M 295.5K 568K 1 /var/backups
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…
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sudo zram-config write
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…
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This will write out any updated files to persistant storage.
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Usefull for new app installs with new logs without need for start/stop or reboot.
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Can be used with a cron job for periodic backup of live logs.
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…
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sudo logrotate -vf /etc/logrotate.conf
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…
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Force new logrotate truncate logs and move oldlogs to oldlog_dir
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…
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pi@raspberrypi:~ $ cat /proc/mounts
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/dev/root / ext4 rw,noatime,data=ordered 0 0
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/dev/root /opt/backups.bind ext4 rw,noatime,data=ordered 0 0
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/dev/zram1 /var/backups ext4 rw,nosuid,nodev,noexec,relatime,data=ordered 0 0
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/dev/root /opt/log.bind ext4 rw,noatime,data=ordered 0 0
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/dev/zram2 /var/log ext4 rw,nosuid,nodev,noexec,relatime,data=ordered 0 0
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tmpfs /run/user/1000 tmpfs rw,nosuid,nodev,relatime,size=44384k,mode=700,uid=100 0,gid=1000 0 0
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…
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pi@raspberrypi:~ $ cat /proc/swaps
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Filename Type Size Used Priority
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/dev/zram0 partition 767996 0 75
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/var/swap file 102396 0 -2
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…
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pi@raspberrypi:~/zram-config $ cat /usr/local/share/zram-config/log/zram-config.log
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zram-config start 20190330_062747Z
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ztab create log lz4 20M 60M /var/log /opt/log.bind /opt/oldlog
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Warning: Stopping rsyslog.service, but it can still be activated by:
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syslog.socket
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mount: /var/log bound on /opt/log.bind.
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mount: /opt/log.bind propagation flags changed.
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insmod /lib/modules/4.14.98+/kernel/mm/zsmalloc.ko
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insmod /lib/modules/4.14.98+/kernel/drivers/block/zram/zram.ko
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zram0 created comp_algorithm=lz4 mem_limit=20M disksize=60M
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mke2fs 1.43.4 (31-Jan-2017)
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fs_types for mke2fs.conf resolution: 'ext4', 'small'
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Discarding device blocks: done
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Filesystem label=
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…
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pi@raspberrypi:~/zram-config $ ls /opt/oldlog
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auth.log.1 debug.1 kern.log.1 term.log.1.gz
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auth.log.2.gz dpkg.log.1 messages.1 user.log.1
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btmp.1 error.log.1 messages.2.gz wtmp.1
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daemon.log.1 error.log.2.gz syslog.1 zram-config.log.1
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daemon.log.2.gz history.log.1.gz syslog.2.gz
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…
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pi@raspberrypi:~ $ zramctl
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NAME ALGORITHM DISKSIZE DATA COMPR TOTAL STREAMS MOUNTPOINT
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/dev/zram0 lz4 1.2G 4K 76B 4K 4 [SWAP]
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/dev/zram1 lz4 150M 16.3M 25.1K 208K 4 /opt/zram/zram1
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/dev/zram2 lz4 60M 7.5M 1.2M 1.7M 4 /opt/zram/zram2
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```
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```
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pi@raspberrypi:~ $ df
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Filesystem 1K-blocks Used Available Use% Mounted on
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/dev/root 14803620 2558152 11611220 19% /
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devtmpfs 470116 0 470116 0% /dev
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tmpfs 474724 223868 250856 48% /dev/shm
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tmpfs 474724 12284 462440 3% /run
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tmpfs 5120 4 5116 1% /run/lock
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tmpfs 474724 0 474724 0% /sys/fs/cgroup
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/dev/mmcblk0p1 44220 22390 21831 51% /boot
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/dev/zram1 132384 280 121352 1% /opt/zram/zram1
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overlay1 132384 280 121352 1% /home/pi/MagicMirror
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/dev/zram2 55408 3460 47648 7% /opt/zram/zram2
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overlay2 55408 3460 47648 7% /var/log
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tmpfs 94944 0 94944 0% /run/user/1000
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```
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```
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cat /etc/ztab
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# swap alg mem_limit disk_size swap_priority page-cluster swappiness
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swap lz4 400M 1200M 75 0 90
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# dir alg mem_limit disk_size target_dir bind_dir
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dir lz4 50M 150M /home/pi/MagicMirror /magicmirror.bind
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# log alg mem_limit disk_size target_dir bind_dir oldlog_dir
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log lz4 20M 60M /var/log /log.bind /oldlog
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```
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```
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pi@raspberrypi:~ $ free -h
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total used free shared buff/cache available
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Mem: 927M 206M 184M 233M 535M 434M
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Swap: 1.3G 0B 1.3G
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```
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```
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pi@raspberrypi:~ $ swapon
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NAME TYPE SIZE USED PRIO
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/dev/zram0 partition 1.2G 0B 75
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/var/swap file 100M 0B -2
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```
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```
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pi@raspberrypi:/opt/zram $ ls
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log.bind magicmirror.bind oldlog zram1 zram2
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```
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```
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pi@raspberrypi:/opt/zram $ top
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top - 23:18:21 up 1:28, 2 users, load average: 0.31, 0.29, 0.29
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Tasks: 114 total, 1 running, 68 sleeping, 0 stopped, 0 zombie
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%Cpu(s): 1.9 us, 0.1 sy, 0.0 ni, 98.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
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KiB Mem : 949448 total, 153464 free, 223452 used, 572532 buff/cache
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KiB Swap: 1331192 total, 1331192 free, 0 used. 412052 avail Mem
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PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
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1215 pi 20 0 600844 325968 287276 S 5.3 34.3 8:09.51 chromium-browse
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2536 pi 20 0 8104 3204 2728 R 1.6 0.3 0:00.11 top
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970 pi 20 0 775108 156128 112876 S 1.0 16.4 11:17.06 chromium-browse
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1611 pi 20 0 11656 3772 3056 S 0.3 0.4 0:00.30 sshd
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1 root 20 0 27072 5964 4824 S 0.0 0.6 0:02.51 systemd
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2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd
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4 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 kworker/0:0H
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6 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 mm_percpu_wq
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7 root 20 0 0 0 0 S 0.0 0.0 0:00.24 ksoftirqd/0
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8 root 20 0 0 0 0 I 0.0 0.0 0:00.87 rcu_sched
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9 root 20 0 0 0 0 I 0.0 0.0 0:00.00 rcu_bh
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```
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### Performance

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