MNByChoice

@MNByChoice@midwest.social

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Sanity check - is rsyncing to a remote computer that has zfs snapshotting an okay way to back things up?

I currently have two computers, one that has a big zfs raidz pool that I currently back everything up to. Right now, on my local computer I use rsnapshot to do snapshot backups via rsync to the remote zfs pool. I know I’m wasting a ton of space because I have snapshotting in the rsync backup, and then the zfs pool is...

MNByChoice,

Have you tried a restore? A non-differential smap snapshot should be fine, but differential snapshots would make a restore difficult to impossible.

A zfssend and zfsrestore with a differential snapshot would be more traditional. If one put mbuffer in the middle, it would even be fast.

Linux file transfer speed bottlenecks?

I’m currently watching the progress of a 4tB rsync file transfer, and i’m curious why the speeds are less than the theoretical read/write maximum speeds of the drives involved with the transfer. I know there’s a lot that can effect transfer speeds, so I guess i’m not asking why my transfer itself isn’t going faster....

MNByChoice, (edited )

Looks like you have your answer, but there are a crazy number of possible issues.

The biggest cause is misreading the performance specs.

A partial list of other options:
Mechanical drives store data in rings. Outer rings have higher speeds than inner due to constant angular velocity.
Seeks cost a lot of throuput on mechanical drives.
Oversubscribed drive cables.
HBA issues.
PCIe data path conflicts
Slow RAM
RAM full or busy
Extra cpy within RAM
NUMA path issues (of drives are connected to different NUMA nodes. Not an issue on desktops.)
CPU too busy
Transfer software doing extra things
File system doing extra.
RAID doing extra.
NIC on a different NUMA node than HBA (can be good or bad).
NIC sharing the data path in a conflicting way.

There are others. Start with checking theoretical performance from data sheets.

Also, details matter, and I don’t have enough of them to guess.

MNByChoice, (edited )

Scientists curating religion? Grifter cults die, only vegan, wicca and Buddhism remains as religions, but everything is well-recorded and studied in its sunset.

Conjecture, or did this happen? If it happened, where and when?

MNByChoice,

Kinda related: what if I install something like Debian/Ubuntu on it? Can I still use the NAS hardware in the same way?

This question confuses me. Debian and Ubuntu can be setup to be NASes.

NAS is a description of a mid-level function that various software provide a part of.

Various file systems and volume managers can provide snapshots and rollbacks. To aid your research LVM, ZFS, and many others support snapshots.

There are various ways to then expose the formatted space to the network. To aid research NFS, SMB, and iSCSI are options.

Anyway, I hope this is helpful to someone.

MNByChoice,

Not really the focus here, but Google could really improve those listings by providing some guidance as to what permissions are actually required for certain tasks.

I am not certain I would know if am SMS program needs full Internet access or not.

(I get in this instance everything added is bad.)

MNByChoice,

Cannot start a statement with else. One can with ifn’t. There is a new thing where we don’t branch (which is a separate discussion).

Or am I missing the joke…

There’s a Multibillion-Dollar Market for Your Phone’s Location Data – The Markup (themarkup.org)

Location firm Near describes itself as “The World’s Largest Dataset of People’s Behavior in the Real-World,” with data representing “1.6B people across 44 countries.” Mobilewalla boasts “40+ Countries, 1.9B+ Devices, 50B Mobile Signals Daily, 5+ Years of Data.” X-Mode’s website claims its data covers “25%+ of...

MNByChoice,

Always seemed the best way to stop this was to make someone important’s data public.

MNByChoice,

Saturnella. It was on the winter solstice, but the Romans later moved the calendar and didn’t change the date.

MNByChoice,

I will point out that paganism includes non-Christian Romans.

I am making this clarification due to the words that follow, which imply Romans are not Pagans.

pagan based rather than Roman

MNByChoice, (edited )

Yeah!

www.britannica.com/…/Saturnalia-Roman-festival

The influence of the Saturnalia upon the celebrations of Christmas and the New Year has been direct. The fact that Christmas was celebrated on the birthday of the unconquered sun (dies solis invicti nati) gave the season a solar background, connected with the kalends of January (January 1, the Roman New Year) when houses were decorated with greenery and lights, and presents were given to children and the poor.

MNByChoice,

I did not know standing sewing machines were a thing. Great to know.

A podium is a good idea. Thank you!

MNByChoice,

really weird to simply stand there and read

Agreed. I am going for a way around that strangeness to increase my active standing time.

Walking is great!

MNByChoice,

Do you have a tall table to aid with the eating while standing?

MNByChoice,

I am thinking about getting a tall cafe table. I would like to test the idea first.

MNByChoice,

Lighting is also helpful in finding the keyboard.

Desktop icons not loading (lemmy.blahaj.zone)

I’ve had this issue for a while now, since I thought I could fix it myself. Almost all my programs have lost their icon image, which is not fixable by applying a different icon theme unfortunately. Just installed the Reversal icon pack to test that. My settings are attached here, sorry for the german:...

MNByChoice,

Have you recently fixed another issue? Perhaps run out of disk space during an update?

MNByChoice,

Exactly. It is critical to learn what the machine means when not under time pressure.

MNByChoice,

Hey now. A divorce could also sink things. He doesn’t have to die for things to go to shit.

(I know nothing of his personal life.)

MNByChoice,

I wonder if the specifics of the hack would make backing up elsewhere fail. Possibly by spreading the hack to new machines.

In any case, testing backups is important.

MNByChoice,

Imposing Democracy on others does not seem to work, or requires a skill set rarely developed.

MNByChoice,

I cannot vouch for the accuracy of the information, but it passes my totally uniformed bullshit detector. distractify.com/…/what-happens-if-a-guy-takes-pla… has an article on just that. In summary, nothing fun or pleasant. Keep away from Ambien, as they may look physically similar.

MNByChoice,

What environmental disaster did am underwear company create? Was it bleech and dye related?

MNByChoice, (edited )

In the USA, many or most speed cameras are owned and operated not by the local police or city, but by a private company that keeps some percent of the fines they give out.

They are contracted by the city, country, or other authority. They are not randomly placed or operated without permission.

MNByChoice,

Starting with a small loan of $10 million, at 8% return, invested for 60 years, is all that is needed to be a billionaire.

Get rich parents that will loan their newborn $10 million.

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