Oracle Solaris ZFS File System (MOSC)

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ZFS Zero Page Reclamation with Hitachi storage

in Oracle Solaris ZFS File System (MOSC) 1 comment

Hi,

I'd like to share my (and my colleague) experience when I used the ZPR (Zero Page Reclamation) feature on ZFS and thin-provisioned Hitachi storage. LUNs were mapped as FC disks and Zpool was created on each LUN.

 

Equipment

Storage Hitachi VSP F600

Server SPARC T8-1

Solaris Operating System - Version 11.4 and ZFS.

 

Steps

Since the TRIM feature is disabled by default (Oracle Doc ID 2053431.1), let's enable it manually by adding the following lines to the /etc/system file and reboot:

 

set zfs:zfs_unmap_ignore_size=0x100000

set zfs:zfs_log_unmap_ignore_size=0x100000

 

Check if TRIM is enabled:

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