Solaris Cluster 4.4 Global Filesystem pxfs performance issues when used with Solaris 11.4 ZFS
(Doc ID 2459049.1)
Last updated on AUGUST 06, 2020
Applies to:Solaris Cluster - Version 4.4 to 4.4 [Release 4.4]
Oracle Solaris on SPARC (64-bit)
Oracle Solaris on x86-64 (64-bit)
Starting Solaris Cluster 4.4 and Solaris release 11.4 we support the usage of ZFS filesystem with global mount option. However in the first release you may experience some performance degradation in comparison with UFS.
Cluster Filesystem also known as Global Filesystem or PxFS (proxy filesystem) makes a filesystem available on all cluster nodes simultaneously. In earlier releases previous to Oracle Solaris Cluster 4.4 we supported it with UFS and QFS. In OSC 4.4 we added ZFS support.
From OSC 4.4 Release Notes:
Cluster File System with ZFS – Beginning with Oracle Solaris Cluster 4.4 you can use proxy file system (PxFS) functionality on top of ZFS datasets. This feature facilitates access to mounted ZFS file systems from any node in the Cluster, delivers ZFS functionality for storage management while maintaining POSIX compliance, and extends Cluster Device Configuration System (DCS) to zpool management.
Investigate Write Performance Improvements for Global ZFS (26201389)
Problem Summary: Based on tested use cases, there might be reasonable performance degradation on PxFS on ZFS compared to PxFS on UFS. Further investigation is needed to address the appropriate usage of Global ZFS.
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