- Talk - lists.gtalug.org

BorgBackup -- any experience?
by D. Hugh Redelmeier 29 Dec '24

29 Dec '24

Has anyone used <https://borgbackup.readthedocs.io/en/stable/index.html> Do you like it? Pros & cons?

6 5

fastest auto-rejection I've ever seen
by David Collier-Brown 17 Dec '24

17 Dec '24

I applied for a position that fit me to a tee on Saturday, hoping to be near the front of the line. It seems I was: I got a rejection letter at 5:30 AM Monday. I suspect there were no humans involved, unless Glassdoor has an India office (they're don't list one, and they're based in California). --dave -- David Collier-Brown, | Always do right. This will gratify System Programmer and Author | some people and astonish the rest davecb(a)spamcop.net | -- Mark Twain

8 13

On a different subject - anyone know anyone from Canonical?
by David Collier-Brown 16 Dec '24

16 Dec '24

They have both good and bad reviews, so I'd like to actually talk (email) with someone there. --dave -- David Collier-Brown, | Always do right. This will gratify System Programmer and Author | some people and astonish the rest davecb(a)spamcop.net | -- Mark Twain

1 0

[GTALUG-Announce] REMINDER: AGM and General Meeting
by Alan Heighway 14 Dec '24

14 Dec '24

Annual General Meeting / Lightning Talks <https://www.gtalug.org/?p=142>December 3, 2024/0 Comments <https://www.gtalug.org/?p=142#respond>/in Uncategorized <https://www.gtalug.org/?cat=1>/by Alan Heighway <https://www.gtalug.org/?author=3> with Board of DirectorsAgenda: 1. Lighting Talks 2. AGM - Treasurer's Report - Nominations for Board of Directors - Vote (If Necessary) - Establishment of the 2025 Board of Directors Date / Time: December 10th, 2024 19:30 EST Location: In Person: TMU George Vari Engineering and Computing Centre, 245 Church Street (just north of Dundas), Room 201 (See note below) Online using Nextcloud: https://hub.gtalug.org/call/7m45sf9i NOTE: The doors to the building are normally locked. There will be someone from GTALUG at the doors on the southeast corner of Church and Gould to let people in. If you come late or don’t see anyone at the door please SMS at 647 657 6575 for THIS NIGHT ONLY. Do not call. *A*lan *H*eighway <http://heighway.ca/> heighway.ca VA3WAH / VA3YKZ [image: Please consider the environment before printing] --- GTALUG Announce mailing list announce(a)gtalug.org https://gtalug.org/mailman/listinfo/announce

6 6

"free" physical objects
by Vasileios Papadiamantopoulos 08 Dec '24

08 Dec '24

Hi everyone, a few years back(before COVID) I participated in a very interesting GTALUG meeting. One of the participants talked about some "free" objects/artifacts that are circulating in our world and people can keep them for certain time. Each object has an id and the temporary "guardian" informs a portal that they have it in their possession using this id. Does anyone remembers this conversation? Does anyone know this project? Thank you for your time stopping by my message. Best, -- Vasileios Papadiamantopoulos, PhD Arch

3 3

access to mailing list web pages broken
by D. Hugh Redelmeier 04 Dec '24

04 Dec '24

We moved most of our stuff to a new machine, but not our mail server of Mailman mailing list system: www.gtalug.org has address 138.197.153.212 gtalug.org has address 138.197.153.212 gtalug.org mail is handled by 0 penguin.gtalug.org. penguin.gtalug.org has address 69.164.222.247 But penguin thinks that it is gtalug.org and www.gtalug.org. and mailman thinks that it is running on gtalug.org or www.gtalug.org. Those are no longer true. What won't work: - links to the mailman web pages - mailing list archives - (maybe) access to our Wiki Even if you reference these by IP address rather than domain name, they won't work because the certificate validation will fail. This is wrong but it may be a while before it is fixed. Horrible work-around: add this line to /etc/hosts 69.164.222.247 gtalug.org www.gtalug.org But remove it as soon as you are done: it will block access to our new website. (Thank BC Ron for this suggestion.)

1 0

Re: [GTALUG] Advice on ZFS server
by David Mason 26 Nov '24

26 Nov '24

Sorry, meant to reply-all, in case any of this is of interest to others. On Mon, 25 Nov 2024 at 21:33, David Mason <dmason(a)torontomu.ca> wrote: > On Mon, 25 Nov 2024 at 15:38, Lennart Sorensen < > lsorense(a)csclub.uwaterloo.ca> wrote: > >> On Mon, Nov 25, 2024 at 11:08:13AM -0500, David Mason via talk wrote: >> > I have spent more than 24 hours researching this... many rabbit holes! >> > >> > As Hugh noted, on the Intel side, ECC awareness is mostly a Xeon thing. >> AMD >> > is much more supportive, but only with some chipsets/motherboards. ECC >> > memory also comes in 2 flavours: >> > 1) Registered (buffered) 80-bit wide, like >> > https://www.kingston.com/datasheets/KF556R36RB-32.pdf >> > 2) Unregistered (unbuffered) 72-bit wide, like: >> > https://www.kingston.com/datasheets/KSM56E46BD8KM-32HA.pdf >> > and, as far as I can tell, they are not inter-compatible if you want >> ECC. >> >> Apparently at the moment, most RDIMM DDR5 is EC8 ECC which is 80bit. >> And most UDIMM is EC4 ECC which is 72 bit. I don't believe there is >> any requirement for it to be that way. >> >> You can not mix buffered and unbuffered as far as I remember. Servers >> with a lot of slots need buffered memory, while systems with only a >> couple of slots per channel don't. >> > > I had seen the buffered one and it seemed a better price than the > unbuffered, but I eventually found unbuffered at a better price yet, which > was good, as that was what the motherboard/CPU combo needed. > > >> > I wanted to take advantage of the NVME SSDs, as they are an order of >> > magnitude faster than SATA, but as I mentioned in another thread, I want >> > RAIDZ3, so I want at least 8 SSDs. So I came across >> >.... > > > Note that this will run mostly headless, apart from maintenance, so I'm >> > more than happy with the built-in Radeon GPU. >> > I have one high performance SSD which will have small boot and swap >> > partitions. The rest are the best cheap SSDs I could find. All 8 will be >> > mostly a large partition for ZFS for a total of about 10TB of RAIDZ3. I >> > could have doubled that for an additional $1250. >> > >> > As this has turned out to be a pretty beefy box, I will likely be >> running >> > Proxmos on top of Debian with ZFS. >> >> So 4 NVMe drives each with 4 PCIe lanes then in a single x16 PCIe slot? >> > > So the PCIe 5 x16 turns into 4 PCIe 4 x4 (because that's what the > multiplexer card is), and one M.2x4 is PCIe 5 and one PCIe 4, so there are > 6 drives that have direct connections to the CPU. The other 2 will be going > through the x670 chip, which means they are multiplexed over one PCIe4x4 > between the chipset and the CPU. This is my understanding from the specs: > https://www.asus.com/ca-en/motherboards-components/motherboards/prime/prime… > but I haven't been able to find a diagram. I base some of what I > "understand" on the diagram of the Taichi near the end of > https://linustechtips.com/topic/1497718-basics-about-pci-lanes-chipset-lane… > > So.... not all Gen 4 x4, but probably close enough... and the best I can > do without Xeon or ThreadRipper. And given that I have 64GiB of memory, it > probably doesn't much matter. :-) > > >> Should give decent bandwidth, although how much of that can your network >> connection even take advantage of? >> >> After all what good is 256Gbps NVMe if your ethernet is 1Gbps or even >> 10Gbps >> > > I'm happy to have the network be the bottleneck. As I mentioned, I plan to > run Proxmox on it, and VMs I run there may use up some of the bandwidth. I > could have saved maybe $500 if I replaced all the NVME SSDs with SATA but > saving 16% to have a disk array that is 10x slower didn't make a lot of > sense to me. Alternatively I could have doubled the storage, but 10TB > already was a huge bump from the current storage I have. (And it's too > late! I have the NVME M.2s sitting on my desk. Waiting for memory, case, > and power.) > > ../Dave >

3 3

Btrfs?
by Giles Orr 26 Nov '24

26 Nov '24

I just (finally) looked up the features of Btrfs, and it sounds fantastic. Possibly ZFS-adjacent but without the nightmarish license problems? Am I missing something? It's in the kernel, but if it was that good, lots of distros would be defaulting to it ... and they're not. A couple have tried, but it hasn't taken off. Can someone fill me in with the details I'm missing? -- Giles https://www.gilesorr.com/ gilesorr(a)gmail.com

8 9

Advice on ZFS server
by David Mason 26 Nov '24

26 Nov '24

I have a decade-old server that gets no love, and is running a very old Debian and ZFS (Linux server 3.2.0-4-amd64 #1 SMP Debian 3.2.63-2+deb7u2 x86_64 GNU/Linux) on a bunch of spinning rust. zpool is producing strange status (i.e. resilvering on multiple drives, making no progress, etc.). So I want to move things off to something more stable. So I want something with at least 5 SST drives for ZFS and a bootable drive not on ZFS (ideally). PCIe would be nice (GBs/sec) but 6 or 8 SATA drives would still be a lot faster than the existing. I'd like it to use DDR5 ECC. I don't need much performance, and I'd like it to be relatively low power. At least a GB Ethernet. I don't need, nor care about, GPUs - at least not at this point. There are a truly mindboggling number of options, but most of the ones that meet my I/O requirements are very high-performance and power-hungry. And almost nothing supports ECC properly On the Intel side there are LGA1851 socket systems. A reasonably-priced one is https://www.canadacomputers.com/en/intel-motherboards/264441/gigabyte-z890-… but it doesn't do ECC properly. On the AMD side there are sTR5 socket systems. A less reasonably priced one is https://www.newegg.ca/gigabyte-trx50-aero-d-extended-atx-amd-trx50-am5/p/N8… but it at least does ECC. Then we get to the CPUs - and even more expensive... I'm not afraid of spending money for a system that will hopefully support our needs for more than another decade (8 2Tb drives is about $1600, but I don't really want to spend another $3000+ for MB+CPU). If I do have to go that high-performance, I'm thinking about Proxmox, but not completely sure - any thoughts on that, too, would be appreciated. Thanks, ../Dave

6 12

Lighting talks for December
by Alan Heighway 22 Nov '24

22 Nov '24

Hello Everyone, We will be having our AGM at the December meeting, we would also like to have 2 or 3 lighting talks... What is a lighting talk? A talk around 5 - 10 minutes that spawns a discussion. Do you have such a talk? Please get in touch... speakers(a)gtalug.org Thanks! Alan. *A*lan *H*eighway <http://heighway.ca/> heighway.ca VA3WAH / VA3YKZ [image: Please consider the environment before printing]

2 1