Difference between revisions of "ZFS"

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== Tuning arc settings ==
 
== Tuning arc settings ==
 +
 
  arcstat
 
  arcstat
 +
arc_summary
 
  grep c_max /proc/spl/kstat/zfs/arcstats
 
  grep c_max /proc/spl/kstat/zfs/arcstats
 
  echo 5368709120 > /sys/module/zfs/parameters/zfs_arc_max
 
  echo 5368709120 > /sys/module/zfs/parameters/zfs_arc_max
  
maybe you need  
+
maybe you need
 +
 
 
  echo 3 > /proc/sys/vm/drop_caches
 
  echo 3 > /proc/sys/vm/drop_caches
  

Revision as of 16:39, 31 October 2021

Links

 

 


HOWTO

Replace disk in zfs

Some links

Get information first:

Name of disk

zpool status

Find uid of disk to replace

take it offline

zpool offline poolname ata-WDC_WD20EFRX-68EUZN0_WD-WCC4M5RLZC6V

Get the disk guid:

zdb

guid: 15233236897831806877

Get list of disk by id:

ls -al /dev/disk/by-id

Save the id, shutdown, replace disk, boot:

Find the new disk:

ls -al /dev/disk/by-id

Run replace command. The id is the guid of the old disk, name is of the new disk

zpool replace tank 13450850036953119346 /dev/disk/by-id/ata-ST4000VN000-1H4168_Z302FQVZ


Tuning arc settings

arcstat
arc_summary
grep c_max /proc/spl/kstat/zfs/arcstats
echo 5368709120 > /sys/module/zfs/parameters/zfs_arc_max

maybe you need

echo 3 > /proc/sys/vm/drop_caches

FAQ

show status

zspool status

show drives/pools

zfs list
      

check raid level

zfs list -a