Robert Milkowski's blog

If you have a file system (nfs, etc.) mounted on-top of a directory and you need to see file permissions, ACLs, etc. of the underlying dire...

NetApp's ONTAP 9.6 introduced new REST API along with a new python module netapp_ontap . #!/bin/python import time import getpass...

The nfsv4 provider provides some structures with component4 type which is defined  as: typedef struct { uint_t utf8string_len; char *utf...

Linux measures load average differently than other OS'es. In a nutshell it includes both CPU and disk i/o and more. Brendan has an excel...

Solaris 11.4 - setting zfs_arc_collect_check=0 via mdb (takes immediate effect) or via /etc/system makes ZFS to start feeding l2arc immediat...

The stop() action in DTrace stops an entire process... well, actually it doesn't. It stops a single thread in a multi-threaded process, ...

Small but useful extension to DTrace is now available in Solaris 11.4.SRU6. It allows to easily print current date with an optional nanoseco...

Solaris 11.4 introduced few new ZFS pool versions with interesting new features or enhancements: # zpool upgrade -v ...  38  Xcopy with ...

On Linux one needs to recompile kernel modules to get protection, while on Solaris this is not necessary. Once you are on Solaris 11.4 with ...

Right, finally Linux is getting something similar and useful to DTrace, see bpftrace . However for it to be useful in enterprise it has to b...

Solaris 11.4 includes fixes for Meltdown and Spectre v2 (fixes for v1 were delievered few months ago for 11.3 via SRU and are also included...

Solaris 11.4 GA is finally out and available for download. See  What’s New

Solaris 11.3 still doesn't support dumpadm -d none. This is useful in some scenarios, for example when troubleshooting failed AI instal...

This got finally integrated into 11.3 SRU 11.3.33.5.0 zfs send compressed data (Bug 15387669)

Thanks to Victor Latushkin, below is a procedure on how to extract ZFS wrapping key for a given dataset. Notice that key length is encoded i...