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Compiled tree of Oasis Linux based on own branch at <https://hacktivis.me/git/oasis/> git clone https://anongit.hacktivis.me/git/oasis-root.git

zpool-trim.8 (3620B)

    

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  21. .\" Copyright (c) 2007, Sun Microsystems, Inc. All Rights Reserved.
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  29. .Dd May 27, 2021
  30. .Dt ZPOOL-TRIM 8
  31. .Os
  32. .
  33. .Sh NAME
  34. .Nm zpool-trim
  35. .Nd initiate TRIM of free space in ZFS storage pool
  36. .Sh SYNOPSIS
  37. .Nm zpool
  38. .Cm trim
  39. .Op Fl dw
  40. .Op Fl r Ar rate
  41. .Op Fl c Ns | Ns Fl s
  42. .Ar pool
  43. .Oo Ar device Ns Oc Ns …
  44. .
  45. .Sh DESCRIPTION
  46. Initiates an immediate on-demand TRIM operation for all of the free space in
  47. a pool.
  48. This operation informs the underlying storage devices of all blocks
  49. in the pool which are no longer allocated and allows thinly provisioned
  50. devices to reclaim the space.
  51. .Pp
  52. A manual on-demand TRIM operation can be initiated irrespective of the
  53. .Sy autotrim
  54. pool property setting.
  55. See the documentation for the
  56. .Sy autotrim
  57. property above for the types of vdev devices which can be trimmed.
  58. .Bl -tag -width Ds
  59. .It Fl d , -secure
  60. Causes a secure TRIM to be initiated.
  61. When performing a secure TRIM, the
  62. device guarantees that data stored on the trimmed blocks has been erased.
  63. This requires support from the device and is not supported by all SSDs.
  64. .It Fl r , -rate Ar rate
  65. Controls the rate at which the TRIM operation progresses.
  66. Without this
  67. option TRIM is executed as quickly as possible.
  68. The rate, expressed in bytes
  69. per second, is applied on a per-vdev basis and may be set differently for
  70. each leaf vdev.
  71. .It Fl c , -cancel
  72. Cancel trimming on the specified devices, or all eligible devices if none
  73. are specified.
  74. If one or more target devices are invalid or are not currently being
  75. trimmed, the command will fail and no cancellation will occur on any device.
  76. .It Fl s , -suspend
  77. Suspend trimming on the specified devices, or all eligible devices if none
  78. are specified.
  79. If one or more target devices are invalid or are not currently being
  80. trimmed, the command will fail and no suspension will occur on any device.
  81. Trimming can then be resumed by running
  82. .Nm zpool Cm trim
  83. with no flags on the relevant target devices.
  84. .It Fl w , -wait
  85. Wait until the devices are done being trimmed before returning.
  86. .El
  87. .Sh PERIODIC TRIM
  88. On machines using systemd, trim timers can be enabled on a per-pool basis.
  89. .Nm weekly
  90. and
  91. .Nm monthly
  92. timer units are provided.
  93. .Bl -tag -width Ds
  94. .It Xo
  95. .Xc
  96. .Nm systemctl
  97. .Cm enable
  98. .Cm zfs-trim-\fIweekly\fB@\fIrpool\fB.timer
  99. .Cm --now
  100. .It Xo
  101. .Xc
  102. .Nm systemctl
  103. .Cm enable
  104. .Cm zfs-trim-\fImonthly\fB@\fIotherpool\fB.timer
  105. .Cm --now
  106. .El
  107. .
  108. .Sh SEE ALSO
  109. .Xr systemd.timer 5 ,
  110. .Xr zpoolprops 7 ,
  111. .Xr zpool-initialize 8 ,
  112. .Xr zpool-wait 8