Project

General

Profile

Bug #833

ZPOOL cache device is emptied after rebooot

Added by Jim Klimov over 8 years ago. Updated over 8 years ago.

Status:
New
Priority:
Normal
Assignee:
-
Category:
zfs - Zettabyte File System
Start date:
2011-03-18
Due date:
% Done:

0%

Estimated time:
Difficulty:
Tags:

Description

I have configured a spare partition from the oi_148a boot drive to be the L2ARC cache device for the data pool residing on dedicated disks of my home NAS.

I was under the impression that L2ARC data should survive reboots and speed up the system with actual cached data as soon as the pool is mounted (imported).

While this cache is automatically re-attached after reboot, it is empty and has to be repopulated from scratch during the system's each uptime. This seems wrong...

//Jim Klimov


Related issues

Related to illumos gate - Feature #3525: Persistent L2ARCFeedback2013-02-04

Actions

History

#1

Updated by Garrett D'Amore over 8 years ago

  • Project changed from OpenIndiana Distribution to illumos gate
#2

Updated by Garrett D'Amore over 8 years ago

  • Category set to zfs - Zettabyte File System

This is a known "feature". We'd like to add persistence to the L2ARC at some day, but for now it starts over... the entire cache can be rebuilt over time anyway. (With performance degradation right after a reboot.)

#3

Updated by Gergő Mihály Doma about 2 years ago

Also available in: Atom PDF