I've used rsnapshot in the past, it uses hardlinks to link between identical file versions, so you don't waste space for files that haven't changed, yet each snapshot provides a complete picture of the state of the filesystem(s) at each time a snapshot was taken. It's worth noting that this likely w...

I use a 10 port supply: https://www.amazon.com/Alxum-Charging-Organizer-Adjustable-Dividers/dp/B01NBTNEO0 currently with 7 RPi4 connected (three more to flesh out my bramble soon), and they're doing fine. It's worth noting that the only things plugged into the RPIs are a small fan and a USB flash st...

Absolutely it will work! I have a cluster of 10 RPis with my main server (running Fedora) as the cluster controller. As long as what you're running on the nodes is the right architecture, it shouldn't matter what the architecture of the controller is. One big caveat: Make sure all nodes (including t...

Or if the card is big enough, remove dphys-swapfile at all and create a real swap partition. Why do you keep recommending this? It's no different. The swap file or swap partition is a file or filesystem in which to place a bucket of memory pages. How it's created doesn't affect how the kernel uses ...

Thanks for the replies! The NFS trickery looks interesting, though it would mean that any failure would result in something going off line, something I'd rather avoid... I had little luck searching for possibilities of distributed filesystems that support RAID across nodes, I'll see what I can find ...

I've got an aging NAS here that has served me well, but I'm also seriously contemplating future replacement/expansion. I'm also looking for more things to do with RPIs :D The idea I keep coming back to is a bramble NAS where each Pi is responsible for one (or perhaps two) discs. This way, when it's ...

I did a cursory search and didn't see any hard answers as to what is the maximum size supported micro SD card for the Pi4B as well as the fastest supported micro SD card for the Pi4B. Any one have the answers? I'd like to think that with all the other improvements there has been a juicy upgrade on ...

It just occurred to me, there's another bit of my history with ARM based boxes I should mention. In 1994, I joined the Apple Newton team in their DTS group. The Newton of course was based on an ARM processor. In 1997 when Steve Jobs very effectively destroyed Newton, I joined Palm Computing. The Pal...

If you install from the repos, you should find the examples under /usr/share/doc/slurm*

I'd grab a copy for you, except I'm using 19.X now, compiled on my Pi's and on my big server which is acting as the controller.

Cheers,
Bruce.

I'm waiting on an order from CanaKit which includes the starter kit as well.

From an email exchange I had with them on Monday, it sounds like they're currently waiting on the cases for the kits.

Cheers,
Bruce.

One thing to double check is: What version of SLURM do you have installed? Stretch has 16.X, whereas Buster has 18.X. slurm.conf has changed a fair bit between those two releases. Grab a copy of the sample file in /usr/share/doc/slurm (uh, I think, going from memory here), and use it as the basis fo...

The repo version of SLURM stores logs in /var/log/slurm-llnl, have a look there. I, literally yesterday, put my first RPi4 into my bramble using SLURM. In the end, because I have a mix of RPi3 nodes running Raspian Stretch, and the RPi4 running Raspian Buster, I ended up building latest SLURM from s...

Heh, I'm going with 4Gb for all I get for one simple reason: There's no such thing as too much RAM (take that Bill Gates!) Seriously though, in my experience, unless you are seriously cash constrained, or have an embedded application where you know precisely the memory requirements, more memory tran...

Well, I guess it's time I stopped lurking and said "Hi!!" I'm a software developer working on email security with Cisco, but in my spare time I'm having a blast with the PI! I've got a 3B+ running Kodi so we can watch our media collection nicely. I've also got a slowly growing bramble with six 3B+s ...