Bug #9102

zfs should be able to initialize storage devices

Added by George Wilson 7 days ago.

Status:NewStart date:2018-02-13
Priority:NormalDue date:
Assignee:George Wilson% Done:


Category:zfs - Zettabyte File System
Target version:-
Difficulty:Medium Tags:needs-triage


The first access to a disk block can incur a performance penalty on some platforms (e.g. AWS's EBS, VMware VMDKs). Therefore it is recommended that volumes be "thick provisioned", where supported by the platform (VMware). Thick provisioning is time consuming and often is ignored. If the thick provision step is omitted, customers will see suboptimal performance until we have written to all parts of the LUN. ZFS should be able to initialize any unused storage to remove any first-write penalty that exists.

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