Complete
Details
Details
Assignee
Vladimir Vinogradenko
Vladimir Vinogradenko
Reporter
Chris Cheney
Chris CheneyLabels
Impact
Medium
Components
Fix versions
Affects versions
Priority
LowMore fields
More fields
Katalon Platform
Katalon Platform
Created April 16, 2021 at 12:33 AM
Updated July 1, 2022 at 5:25 PM
Resolved May 25, 2021 at 12:03 PM
I originally posted this in the TrueNAS SCALE forum.
On TrueNAS SCALE 21.02 I noticed that my boot-pool was constantly being written to even after moving the system dataset off of it. This is particularly important in the unsupported USB boot-pool case.
Looking at iotop and lsof a few things seem to still be constantly writing to the boot-pool even after moving the system dataset and rebooting:
15:55:02 50648 be/4 root 0.00 K/s 398.96 K/s 0.00 % 0.00 % rrdcached -j /var/lib/rrdcached/journal/ -p /var/run/rrdcached.pid -l unix:/var/run/rrdcached.sock
15:55:12 50648 be/4 root 0.00 K/s 544.28 K/s 0.00 % 0.00 % rrdcached -j /var/lib/rrdcached/journal/ -p /var/run/rrdcached.pid -l unix:/var/run/rrdcached.sock
15:55:13 6674 be/4 root 0.00 K/s 46.14 K/s 0.00 % 0.00 % nscd
15:55:19 6678 be/4 root 5.70 K/s 22.79 K/s 0.00 % 0.00 % nscd
15:55:22 50648 be/4 root 0.00 K/s 567.15 K/s 0.00 % 0.00 % rrdcached -j /var/lib/rrdcached/journal/ -p /var/run/rrdcached.pid -l unix:/var/run/rrdcached.sock
15:55:32 50648 be/4 root 0.00 K/s 185.62 K/s 0.00 % 0.00 % rrdcached -j /var/lib/rrdcached/journal/ -p /var/run/rrdcached.pid -l unix:/var/run/rrdcached.sock
15:55:32 50648 be/4 root 0.00 K/s 360.99 K/s 0.00 % 0.00 % rrdcached -j /var/lib/rrdcached/journal/ -p /var/run/rrdcached.pid -l unix:/var/run/rrdcached.sock
15:55:42 50648 be/4 root 0.00 K/s 384.96 K/s 0.00 % 0.00 % rrdcached -j /var/lib/rrdcached/journal/ -p /var/run/rrdcached.pid -l unix:/var/run/rrdcached.sock
15:55:52 50648 be/4 root 0.00 K/s 47.85 K/s 0.00 % 0.00 % rrdcached -j /var/lib/rrdcached/journal/ -p /var/run/rrdcached.pid -l unix:/var/run/rrdcached.sock
15:55:52 50648 be/4 root 0.00 K/s 398.93 K/s 0.00 % 0.00 % rrdcached -j /var/lib/rrdcached/journal/ -p /var/run/rrdcached.pid -l unix:/var/run/rrdcached.sock
15:55:54 6674 be/4 root 0.00 K/s 56.71 K/s 0.00 % 0.00 % nscd
15:55:59 6680 be/4 root 7.47 K/s 0.00 K/s 0.00 % 0.00 % nscd
lsof shows the following files on boot-pool open for write:
asyncio_l 1274 0 23u REG 0,24 1097728 309 /data/freenas-v1.db
asyncio_l 1274 0 41w REG 0,24 0 131736 /root/syslog/failover.log
dhclient 3809 0 7w REG 0,24 1084 131859 /var/lib/dhcp/dhclient.leases.enp5s0
nscd 6667 0 6u REG 0,24 217032 131590 /var/cache/nscd/passwd
nscd 6667 0 7r REG 0,24 217032 131590 /var/cache/nscd/passwd
nscd 6667 0 8u REG 0,24 217032 131591 /var/cache/nscd/group
nscd 6667 0 9r REG 0,24 217032 131591 /var/cache/nscd/group
nscd 6667 0 10u REG 0,24 217032 131592 /var/cache/nscd/hosts
nscd 6667 0 11r REG 0,24 217032 131592 /var/cache/nscd/hosts
nscd 6667 0 12u REG 0,24 217032 131593 /var/cache/nscd/services
nscd 6667 0 13r REG 0,24 217032 131593 /var/cache/nscd/services
nscd 6667 0 14u REG 0,24 217032 131594 /var/cache/nscd/netgroup
nscd 6667 0 15r REG 0,24 217032 131594 /var/cache/nscd/netgroup
syslog-ng 6771 0 10u REG 0,24 16384 132228 /var/lib/syslog-ng/syslog-ng.persist
container 6777 0 3uW REG 0,24 524288 131596 /var/lib/containerd/io.containerd.metadata.v1.bolt/meta.db
rrdcached 7031 0 3w REG 0,24 10321920 132112 /var/lib/rrdcached/journal/rrd.journal.1618516563.583758
So the boot-pool appears to still be constantly written to by nscd and rrdcached.
There is already a /var/db/system/rrd-(uuid) directory that the rrd files probably could be moved to. nscd might need a separate system directory setup.