![]() # faulty drive and run "zpool scrub" on the affected volume after resilvering. # are reported an email will be sent out. # on all volumes and all drives using "zpool status". # Errors - Check the columns for READ, WRITE and CKSUM (checksum) drive errors Printf "One of the pools has reached it's max capacity!" # optimal set of sequential writes and write performance is severely impacted.Ĭapacity=$(/sbin/zpool list -H -o capacity | cut -d'%' -f1) ![]() # ZFS will be have to randomly write blocks. If the pool is at capacity and space limited, This method is true only when the pool has # sequential free blocks first and when the uberblock has been updated the new # probably set the warning closer to 95%. If you have a 60TB raid-z2 array then you can # percentage really depends on how large your volume is. # Capacity - Make sure the pool capacity is below 80% for best performance. Printf "One of the pools is in one of these statuses: DEGRADED|FAULTED|OFFLINE|UNAVAIL|REMOVED|FAIL|DESTROYED|corrupt|cannot|unrecover!\n" # any keyword signifying a degraded or broken array.Ĭondition=$(/sbin/zpool status | grep -E 'DEGRADED|FAULTED|OFFLINE|UNAVAIL|REMOVED|FAIL|DESTROYED|corrupt|cannot|unrecover') # Health - Check if all zfs volumes are in good condition. In most cases, a scrubing operation to ensure data integrity. Usage="Usage: $0 maxCapacityInPercentages scrubExpireInSeconds\n" Only one active scrubbing operation per pool can occur at one time. TrimExpire=$2 # in seconds (691200 = 8 days) ScrubExpire=$2 # in seconds (691200 = 8 days) # with a return code instead of sending an e-mail ![]() # Main difference from the original script is that this one exits ![]() OpenZFS 2.0 is also available on FreeBSD 12.1 and later via the openzfs-kmod port/package. # Scrub and Trim share the same expiration threshold for the backward compatibility reasons. The zpool iostat command has been greatly expanded in recent years, with OpenZFS 2.0 (coming in FreeBSD 13.0) offering new flags, including -l to monitor latency, and the ability to filter to a specific disk. # check program zfs_health with path "/path/to/this/script 80 691200" In the ZFS Administration Guide by Aaron Toponce, he advises to scrub. # and 691200 is scrub and trim expiration in seconds): ZFS makes it easy to destroy a mounted storage pool, removing all metadata about. # Assumed usage in monitrc (where 80 is max capacity in percentages When scrubbing multiple pools on the same box, scrub output on zpool status shows " slow scrub" and does not give estimated completion even when scrub is visibly proceeding (by change of. All you need to know is the partition name or block number Perhaps. # In Trim Expired section adjust the date format directly in the for loop's awk parameter. Btrfs has had its origin has a file system for Linux while ZFS was conceived inside. # and comment two Ubuntu date lines and uncomment two FreeBSD lines in Scrub Expired section. # If you want to use it on FreeBSD then go to Scrub Expired section and Trim Expired section # Should be compatible with FreeBSD and Linux. As its title says it outputs zpool status to the console so it could be recorded by Monit and displayed in its user interface. Last but not least is the "Output for monit user interface" section. This is in order to keep configuration in one place (i.e. Next thing is that, in the beginning of the script, I added support for input parameters for max capacity and scrub expiration of your zpools. If you want to use this script on FreeBSD then you want these lines to look like in the original script. Next difference is that in bellows script lines 126 and 127 are uncommented (and lines 130 and 131 commented). The script is part of the Ubuntu package discussed here ĭon’t forget permissions : chmod 755 /opt/scrub.Script, to be able to be run by Monit, needs to return exit code instead of sending an email. It should happen now and again, but if everything is going smooth sailing we tend to forget to do this With the ever increasing amount of ZFS servers around, it tends to be a hassle, so this is a perfect candidate for automation ! Details on the scrubbing □Īwk 'BEGIN ' | \ So scrubbing ZFS: Giving ZFS a moment to sit down and think about its behavior.
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