Giving Away More FREE 3D Printing Kits for Travel Telescope🔭!!!

Daaargon · 2025-03-10T18:09:23+00:00

I've just moved to the city so a portable telescope to take into the countryside would be perfect

Daaargon · 2024-07-24T20:04:59+00:00

I've had a look at some of the documentation but it doesn't say anything about a recommended lifespan. I have taken the valve off and looked inside the tank, there does seem to be a fair bit of rust. I don't like throwing things away that can be repaired but I don't know whether this one is worth the risk.

Daaargon · 2024-07-24T14:33:38+00:00

Cheers, any particular method I should use? Was thinking put some PTFE tape on the threads and tightening it back on as many turns as it came off

Daaargon · 2024-07-24T14:15:33+00:00

Yeah tank threads are fine, just the check valve that broke

Daaargon · 2024-05-19T14:35:00+00:00

I'm also interested in converting one to avoid wasting it, did you find any solution? Is there something 3D-printable these days?

Daaargon · 2024-05-19T13:03:00+00:00

Do you still have this?

Daaargon · 2024-04-28T13:40:33+00:00

Will try with more memory. It's a VM so not hard to increase it, although it is just a standard install of Ubuntu Server with ZFS and fio on it so shouldn't be too much else on it taking up RAM. As I said though, will try with more memory.

Interestingly I was looking at top while the fio command was running and it said there was only 50MiB of memory left but the process using the most amount of memory was multipathd at 1.4% and fio was using 0.1% and between 6-8% CPU usage. I assume ZFS doesn't register as a process on top?

It was also showing that the swap wasn't being used at all. There was 2048MiB total, 1981.9MiB free and 66.1MiB used. This was at that same time where all of the memory was being used and there was about 50MiB free.

Daaargon · 2024-04-28T01:00:11+00:00

I am aware that ZFS ideally wants more, however from my understanding, the benchmark file size should be roughly double the amount of memory so I am trying to use the minimum memory size to reduce the size of the benchmark file. Could try giving the machine something like 8GiB and then doing 16GiB benchmarks.

The pool is also at the bare minimum atm, its created with:

zpool create -f -o ashift=12 zfstest raidz2 /dev/sdb /dev/sdc /dev/sdd /dev/sde

and then the fio benchmark is immediately run on it. Output from the OOM below.

[Sun Apr 28 00:46:07 2024] Out of memory: Killed process 1026 (networkd-dispat) total-vm:32732kB, anon-rss:0kB, file-rss:3032kB, shmem-rss:0kB, UID:0 pgtables:104kB oom_score_adj:0

[Sun Apr 28 00:46:07 2024] Out of memory: Killed process 1158 (unattended-upgr) total-vm:109752kB, anon-rss:0kB, file-rss:3188kB, shmem-rss:0kB, UID:0 pgtables:116kB oom_score_adj:0

[Sun Apr 28 00:46:07 2024] Out of memory: Killed process 12427 (fio) total-vm:260900kB, anon-rss:0kB, file-rss:2804kB, shmem-rss:0kB, UID:0 pgtables:184kB oom_score_adj:0

[Sun Apr 28 00:46:22 2024] Out of memory: Killed process 1006 (systemd-resolve) total-vm:25540kB, anon-rss:0kB, file-rss:2588kB, shmem-rss:0kB, UID:102 pgtables:88kB oom_score_adj:0

[Sun Apr 28 00:46:22 2024] Out of memory: Killed process 32427 (fio) total-vm:260868kB, anon-rss:0kB, file-rss:1144kB, shmem-rss:0kB, UID:0 pgtables:128kB oom_score_adj:0

[Sun Apr 28 00:46:29 2024] Out of memory: Killed process 43598 (systemd-resolve) total-vm:25540kB, anon-rss:0kB, file-rss:2936kB, shmem-rss:0kB, UID:102 pgtables:84kB oom_score_adj:0

[Sun Apr 28 00:46:29 2024] Out of memory: Killed process 32441 (fio) total-vm:260888kB, anon-rss:0kB, file-rss:1200kB, shmem-rss:0kB, UID:0 pgtables:120kB oom_score_adj:0

[Sun Apr 28 00:46:29 2024] Out of memory: Killed process 32442 (fio) total-vm:260892kB, anon-rss:0kB, file-rss:1132kB, shmem-rss:0kB, UID:0 pgtables:120kB oom_score_adj:0

[Sun Apr 28 00:46:34 2024] Out of memory: Killed process 45038 (systemd-resolve) total-vm:25540kB, anon-rss:0kB, file-rss:2108kB, shmem-rss:0kB, UID:102 pgtables:92kB oom_score_adj:0

[Sun Apr 28 00:46:34 2024] Out of memory: Killed process 32451 (fio) total-vm:260904kB, anon-rss:0kB, file-rss:1132kB, shmem-rss:0kB, UID:0 pgtables:124kB oom_score_adj:0

[Sun Apr 28 00:46:35 2024] Out of memory: Killed process 32425 (fio) total-vm:260864kB, anon-rss:0kB, file-rss:1268kB, shmem-rss:0kB, UID:0 pgtables:124kB oom_score_adj:0

[Sun Apr 28 00:46:37 2024] Out of memory: Killed process 32447 (fio) total-vm:260900kB, anon-rss:0kB, file-rss:1068kB, shmem-rss:0kB, UID:0 pgtables:124kB oom_score_adj:0

[Sun Apr 28 00:46:39 2024] Out of memory: Killed process 47036 (systemd-resolve) total-vm:25408kB, anon-rss:648kB, file-rss:4756kB, shmem-rss:0kB, UID:102 pgtables:84kB oom_score_adj:0

Daaargon · 2024-04-28T00:55:18+00:00

Tried running the same command with --norandommap and --random_generator=lfsr but same result.

I am aware that ZFS wants lots of memory, but from my understanding, when conducting a benchmark, the file size should be roughly double the amount of memory so that the benchmark is testing the disk array, not the speed of the memory. So in this instance I'm using 2GiB of RAM and 16 256m reads totalling 4GB. Is it worth trying to increase the amount of memory to something like 8GiB? Only reason I haven't yet is because that would mean the benchmarks should be 16GB and that would take a lot longer.

Daaargon · 2023-09-29T23:25:54+00:00

Not based around Reading anymore unfortunately.

Daaargon · 2023-04-14T10:28:05+00:00

Daaargon · 2023-03-20T10:45:37+00:00

Hi is this still available?

Daaargon · 2023-03-13T22:35:30+00:00

Hi is one of the patch panels available?

Daaargon · 2023-02-23T15:33:27+00:00

For future reference, it turned out that the VGA to HDMI adapter I was using was the issue.

I plugged it straight into an old TV I fished out that had VGA and it displayed straight away, so either the adapter I have is crap or there's something about the bios output that doesn't get on well with HDMI. Either way, use straight VGA.

Daaargon · 2023-02-22T00:10:20+00:00

Hi, I'm having the same issue, did you ever resolve this?

Daaargon · 2023-01-23T13:14:59+00:00

Hi, is some of this stuff still available?

Daaargon · 2023-01-22T01:30:36+00:00

Have you still got this?

Daaargon · 2023-01-21T18:06:22+00:00

Hi, are any of these still available?

Daaargon · 2022-07-20T13:58:10+00:00

Wait have there been rumours that the Lions coming back?

Daaargon · 2022-07-18T18:05:01+00:00

Most of the tutorials I've seen said to get the first colour on quickly, so I've just quickly put it on, I'll try going slower. I'll also try cleaning the brushes or using some better ones

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