My Saturday: scrambling to finish #openzfsmastery.
Their #Raturday: this.
We are not the same. #petRats #rats
Their #Raturday: this.
We are not the same. #petRats #rats
November 7, 2026 at 5:09 PM
My Saturday: scrambling to finish #openzfsmastery.
Their #Raturday: this.
We are not the same. #petRats #rats
Their #Raturday: this.
We are not the same. #petRats #rats
"Windows systems have a complicated relationship with upper and lower case filenames, so also set casesensitivity to mixed."
That's downright tactful. #openzfsmastery
That's downright tactful. #openzfsmastery
November 5, 2026 at 5:54 PM
"Windows systems have a complicated relationship with upper and lower case filenames, so also set casesensitivity to mixed."
That's downright tactful. #openzfsmastery
That's downright tactful. #openzfsmastery
Fulfilled most of the #twistedPresents Kickstarter today, except for the hardcover dropships.
Discussed OpenZFS fragmentation in #openzfsmastery.
An hour of tai chi this evening.
I'll take it.
Discussed OpenZFS fragmentation in #openzfsmastery.
An hour of tai chi this evening.
I'll take it.
November 7, 2026 at 1:02 AM
Fulfilled most of the #twistedPresents Kickstarter today, except for the hardcover dropships.
Discussed OpenZFS fragmentation in #openzfsmastery.
An hour of tai chi this evening.
I'll take it.
Discussed OpenZFS fragmentation in #openzfsmastery.
An hour of tai chi this evening.
I'll take it.
"The ARC wants to be helpful, like a young Wesley Crusher." #openzfsmastery #nonotryagain
See, not EVERY thought I have goes into a book!
See, not EVERY thought I have goes into a book!
November 4, 2026 at 2:56 PM
"The ARC wants to be helpful, like a young Wesley Crusher." #openzfsmastery #nonotryagain
See, not EVERY thought I have goes into a book!
See, not EVERY thought I have goes into a book!
That's #openzfsmastery Chapter 15, on caches, done!
Like the October "See the Sausage Being Made" post says, nothing concentrates the mind like the prospect of being hanged...
Like the October "See the Sausage Being Made" post says, nothing concentrates the mind like the prospect of being hanged...
November 3, 2026 at 11:46 PM
That's #openzfsmastery Chapter 15, on caches, done!
Like the October "See the Sausage Being Made" post says, nothing concentrates the mind like the prospect of being hanged...
Like the October "See the Sausage Being Made" post says, nothing concentrates the mind like the prospect of being hanged...
#OpenZFS includes arcstat, their standard tool to interrogate ARC stats.
It's in python, so #FreeBSD doesn't install it.
It'd be really nice to have this as a package before #openzfsmastery comes out.
It's in python, so #FreeBSD doesn't install it.
It'd be really nice to have this as a package before #openzfsmastery comes out.
November 4, 2026 at 1:49 AM
#OpenZFS includes arcstat, their standard tool to interrogate ARC stats.
It's in python, so #FreeBSD doesn't install it.
It'd be really nice to have this as a package before #openzfsmastery comes out.
It's in python, so #FreeBSD doesn't install it.
It'd be really nice to have this as a package before #openzfsmastery comes out.
"The ghost lists for the MRU and MFU caches keep metadata about evicted blocks. If they are zero-sized, the hosts’ ARC has zero memory pressure. Stop tuning immediately." #openzfsmastery
Crunching to get this done before my surgery. I'd appreciate your support. mwl.io/sponsor
Crunching to get this done before my surgery. I'd appreciate your support. mwl.io/sponsor
OpenZFS Mastery sponsorship.
Offering a terrible deal to help me make this book.
mwl.io
November 3, 2026 at 9:10 PM
"The ghost lists for the MRU and MFU caches keep metadata about evicted blocks. If they are zero-sized, the hosts’ ARC has zero memory pressure. Stop tuning immediately." #openzfsmastery
Crunching to get this done before my surgery. I'd appreciate your support. mwl.io/sponsor
Crunching to get this done before my surgery. I'd appreciate your support. mwl.io/sponsor
First draft of #openzfsmastery chapter 12 complete! Moving on to chapter 15 because my brain needs a break.
Still trying to finish first draft before my shoulder surgery. I'd appreciate your support. mwl.io/sponsor
Still trying to finish first draft before my shoulder surgery. I'd appreciate your support. mwl.io/sponsor
OpenZFS Mastery sponsorship.
Offering a terrible deal to help me make this book.
mwl.io
October 29, 2026 at 7:34 PM
First draft of #openzfsmastery chapter 12 complete! Moving on to chapter 15 because my brain needs a break.
Still trying to finish first draft before my shoulder surgery. I'd appreciate your support. mwl.io/sponsor
Still trying to finish first draft before my shoulder surgery. I'd appreciate your support. mwl.io/sponsor
Worked on #openzfsmastery L2ARC, and am now completely fried. I could push it, but it'd break my brain tomorrow.
Dinner then dojo meditation class.
Dinner then dojo meditation class.
October 29, 2026 at 9:43 PM
Worked on #openzfsmastery L2ARC, and am now completely fried. I could push it, but it'd break my brain tomorrow.
Dinner then dojo meditation class.
Dinner then dojo meditation class.
Today's #openzfsmastery status:
BIOS drive C: is disk0
ZFS: unsupported feature: com.delphix:redacted_datasets
ZFS: bool zroot is not supported
Guess the book better mention that...
BIOS drive C: is disk0
ZFS: unsupported feature: com.delphix:redacted_datasets
ZFS: bool zroot is not supported
Guess the book better mention that...
October 27, 2026 at 4:53 PM
Today's #openzfsmastery status:
BIOS drive C: is disk0
ZFS: unsupported feature: com.delphix:redacted_datasets
ZFS: bool zroot is not supported
Guess the book better mention that...
BIOS drive C: is disk0
ZFS: unsupported feature: com.delphix:redacted_datasets
ZFS: bool zroot is not supported
Guess the book better mention that...
Pondering and pummeling ZFS snapshot redaction for #openzfsmastery today. My brain is now pulp, knocking off for the day.
Still pushing to finish before 12 November. I'd appreciate your support. mwl.io/sponsor
Still pushing to finish before 12 November. I'd appreciate your support. mwl.io/sponsor
OpenZFS Mastery sponsorship.
Offering a terrible deal to help me make this book.
mwl.io
October 26, 2026 at 10:41 PM
Pondering and pummeling ZFS snapshot redaction for #openzfsmastery today. My brain is now pulp, knocking off for the day.
Still pushing to finish before 12 November. I'd appreciate your support. mwl.io/sponsor
Still pushing to finish before 12 November. I'd appreciate your support. mwl.io/sponsor
Rototilling #openzfsmastery material on SSDs and NVMes to be OS-agnostic.
Hopefully this is the last churn? Please?
Pushing to get a first draft off to tech review by 12 November, when I have rotator cuff surgery and implode for 6 weeks. I'd appreciate your support. mwl.io/sponsor
Hopefully this is the last churn? Please?
Pushing to get a first draft off to tech review by 12 November, when I have rotator cuff surgery and implode for 6 weeks. I'd appreciate your support. mwl.io/sponsor
OpenZFS Mastery sponsorship.
Offering a terrible deal to help me make this book.
mwl.io
October 20, 2026 at 9:28 PM
Rototilling #openzfsmastery material on SSDs and NVMes to be OS-agnostic.
Hopefully this is the last churn? Please?
Pushing to get a first draft off to tech review by 12 November, when I have rotator cuff surgery and implode for 6 weeks. I'd appreciate your support. mwl.io/sponsor
Hopefully this is the last churn? Please?
Pushing to get a first draft off to tech review by 12 November, when I have rotator cuff surgery and implode for 6 weeks. I'd appreciate your support. mwl.io/sponsor
Me, 4PM: "dang it, why is my incremental zfs send of /var/mysql sending the entire file instead of just the changes from yesterday???"
Me, now: "Oh. The contents of /var/mysql churn 99% between then and now."
Anyway, I'm grinding on #openzfsmastery. I'd appreciate your support. mwl.io/sponsor
Me, now: "Oh. The contents of /var/mysql churn 99% between then and now."
Anyway, I'm grinding on #openzfsmastery. I'd appreciate your support. mwl.io/sponsor
OpenZFS Mastery sponsorship.
Offering a terrible deal to help me make this book.
mwl.io
October 14, 2026 at 9:54 PM
Me, 4PM: "dang it, why is my incremental zfs send of /var/mysql sending the entire file instead of just the changes from yesterday???"
Me, now: "Oh. The contents of /var/mysql churn 99% between then and now."
Anyway, I'm grinding on #openzfsmastery. I'd appreciate your support. mwl.io/sponsor
Me, now: "Oh. The contents of /var/mysql churn 99% between then and now."
Anyway, I'm grinding on #openzfsmastery. I'd appreciate your support. mwl.io/sponsor
Good chunk of the #openzfsmastery replication chapter done today.
But it's the last known warm day of the year, so I'm breaking several of my own rules and knocking off early to have dinner out. There's an indie bbq place with a patio I've wanted to try.
But it's the last known warm day of the year, so I'm breaking several of my own rules and knocking off early to have dinner out. There's an indie bbq place with a patio I've wanted to try.
October 13, 2026 at 9:09 PM
Good chunk of the #openzfsmastery replication chapter done today.
But it's the last known warm day of the year, so I'm breaking several of my own rules and knocking off early to have dinner out. There's an indie bbq place with a patio I've wanted to try.
But it's the last known warm day of the year, so I'm breaking several of my own rules and knocking off early to have dinner out. There's an indie bbq place with a patio I've wanted to try.
"As the old saying goes: everybody has a test environment. Some people are lucky enough to have a separate environment to run production in." #openzfsmastery #footnote
October 13, 2026 at 3:04 PM
"As the old saying goes: everybody has a test environment. Some people are lucky enough to have a separate environment to run production in." #openzfsmastery #footnote
"It is possible but rare to regret having too many datasets. Far more common is wishing you had divided your data into more datasets."
Anyway, I'm working on my web server for #openzfsmastery, sites will be going up and down.
Anyway, I'm working on my web server for #openzfsmastery, sites will be going up and down.
October 13, 2026 at 4:58 PM
"It is possible but rare to regret having too many datasets. Far more common is wishing you had divided your data into more datasets."
Anyway, I'm working on my web server for #openzfsmastery, sites will be going up and down.
Anyway, I'm working on my web server for #openzfsmastery, sites will be going up and down.
Got the #OpenZFSMastery section on dataset-level encryption done! Tomorrow, LUKS and maybe GELI.
October 11, 2026 at 9:54 PM
Got the #OpenZFSMastery section on dataset-level encryption done! Tomorrow, LUKS and maybe GELI.
I used to call it "rubber hose cryptography" or "kneecap cryptography" or any number of things in an effort to avoid spelling out the real threat. People didn't get it.
I think I'll start calling it an "XKCD 538 attack" instead. Anyone who doesn't look it up isn't my reader. #openzfsmastery
I think I'll start calling it an "XKCD 538 attack" instead. Anyone who doesn't look it up isn't my reader. #openzfsmastery
October 12, 2026 at 2:17 PM
I used to call it "rubber hose cryptography" or "kneecap cryptography" or any number of things in an effort to avoid spelling out the real threat. People didn't get it.
I think I'll start calling it an "XKCD 538 attack" instead. Anyone who doesn't look it up isn't my reader. #openzfsmastery
I think I'll start calling it an "XKCD 538 attack" instead. Anyone who doesn't look it up isn't my reader. #openzfsmastery
Really grinding to try to get a first cut of #openzfsmastery finished before my surgery. It's possible, in theory.
But taking tomorrow to chill with a buddy, watch some classic TNG, and eat pizza. Because my brain is bloody fried.
But taking tomorrow to chill with a buddy, watch some classic TNG, and eat pizza. Because my brain is bloody fried.
October 10, 2026 at 9:38 PM
Really grinding to try to get a first cut of #openzfsmastery finished before my surgery. It's possible, in theory.
But taking tomorrow to chill with a buddy, watch some classic TNG, and eat pizza. Because my brain is bloody fried.
But taking tomorrow to chill with a buddy, watch some classic TNG, and eat pizza. Because my brain is bloody fried.
"If you cannot consistently type your passphrase correctly twice in a row, consider a simpler passphrase. If you can consistently type your passphrase correctly any number of times in a row, get a more complex one." #openzfsmastery #footnote
I'd appreciate help finishing this book. mwl.io/sponsor
I'd appreciate help finishing this book. mwl.io/sponsor
OpenZFS Mastery Sponsor – Tilted Windmill Press
mwl.io
October 10, 2026 at 9:09 PM
"If you cannot consistently type your passphrase correctly twice in a row, consider a simpler passphrase. If you can consistently type your passphrase correctly any number of times in a row, get a more complex one." #openzfsmastery #footnote
I'd appreciate help finishing this book. mwl.io/sponsor
I'd appreciate help finishing this book. mwl.io/sponsor
Today in #openzfsmastery:
"Are you protecting your laptop from random goons or state actors? Will the impact max out at swearing, scandal, or sabotage? Is someone going to hire a character from a cheesy Lucas novel to break into your data center and steal your hard drives?"
mwl.io/sponsor
"Are you protecting your laptop from random goons or state actors? Will the impact max out at swearing, scandal, or sabotage? Is someone going to hire a character from a cheesy Lucas novel to break into your data center and steal your hard drives?"
mwl.io/sponsor
OpenZFS Mastery Sponsor – Tilted Windmill Press
mwl.io
October 10, 2026 at 4:42 PM
Today in #openzfsmastery:
"Are you protecting your laptop from random goons or state actors? Will the impact max out at swearing, scandal, or sabotage? Is someone going to hire a character from a cheesy Lucas novel to break into your data center and steal your hard drives?"
mwl.io/sponsor
"Are you protecting your laptop from random goons or state actors? Will the impact max out at swearing, scandal, or sabotage? Is someone going to hire a character from a cheesy Lucas novel to break into your data center and steal your hard drives?"
mwl.io/sponsor
That's chapter 10 of #openZFSmastery, on delegation, done! Covers delegating to users, #FreeBSD jails, and unprivileged #proxmox containers.
Wishing proxmox had better ZFS integration, but maybe it'll come.
Want your name in the book? mwl.io/sponsor
But now, pajamas and Ted Lasso.
Wishing proxmox had better ZFS integration, but maybe it'll come.
Want your name in the book? mwl.io/sponsor
But now, pajamas and Ted Lasso.
OpenZFS Mastery Sponsor – Tilted Windmill Press
mwl.io
October 8, 2026 at 10:11 PM
That's chapter 10 of #openZFSmastery, on delegation, done! Covers delegating to users, #FreeBSD jails, and unprivileged #proxmox containers.
Wishing proxmox had better ZFS integration, but maybe it'll come.
Want your name in the book? mwl.io/sponsor
But now, pajamas and Ted Lasso.
Wishing proxmox had better ZFS integration, but maybe it'll come.
Want your name in the book? mwl.io/sponsor
But now, pajamas and Ted Lasso.
Today in #openZFSmastery:
"Lucas can now manage his own mistakes. Jude, of course, must manage the mistake of giving Lucas a jail."
I'd appreciate your support writing this book. mwl.io/sponsor
"Lucas can now manage his own mistakes. Jude, of course, must manage the mistake of giving Lucas a jail."
I'd appreciate your support writing this book. mwl.io/sponsor
OpenZFS Mastery Sponsor – Tilted Windmill Press
mwl.io
October 8, 2026 at 5:05 PM
Today in #openZFSmastery:
"Lucas can now manage his own mistakes. Jude, of course, must manage the mistake of giving Lucas a jail."
I'd appreciate your support writing this book. mwl.io/sponsor
"Lucas can now manage his own mistakes. Jude, of course, must manage the mistake of giving Lucas a jail."
I'd appreciate your support writing this book. mwl.io/sponsor
Today's #60SecondsOfWIP has escaped! "A Monstrous Heap of Redirections," from #openzfsMastery
At mwl.io/archives/25008 or wherever podcasts are sold.
At mwl.io/archives/25008 or wherever podcasts are sold.
132: A Monstrous Heap of Redirections
from OpenZFS Mastery
mwl.io
October 8, 2026 at 1:11 PM
Today's #60SecondsOfWIP has escaped! "A Monstrous Heap of Redirections," from #openzfsMastery
At mwl.io/archives/25008 or wherever podcasts are sold.
At mwl.io/archives/25008 or wherever podcasts are sold.
My plan: writer meeting, quick grocery run, write the Patronizer post, work on #openzfsMastery.
Their plan: this.
I prefer their plan #petRats #rats
Their plan: this.
I prefer their plan #petRats #rats
October 6, 2026 at 2:51 PM
My plan: writer meeting, quick grocery run, write the Patronizer post, work on #openzfsMastery.
Their plan: this.
I prefer their plan #petRats #rats
Their plan: this.
I prefer their plan #petRats #rats