ryao

99 ms·

481.
by ryao 1y ago
Germany with their autobahn is the best example. There is no speed limit and it is far safer than US highways.
482.
by ryao 1y ago
This seems appropriate here: https://www.youtube.com/watch?v=vOwmgEeSoms Now whenever I hear someone was unable to pass on a highway because of that law, I will imagine this.
483.
by ryao 1y ago
I expect this to increase the number of vehicle accidents since it is forcing people to drive at speeds well below the well established principle of the 85th percentile. We could have improved safety from increasing speed limits to the 85th
484.
by ryao 1y ago
There are typically no pedestrians on highways. Being a pedestrian on a high way is hazardous no matter what the speed limit is for any realistic speed limit. If the cars move faster, they will get off the road faster. This means fewer vehi
485.
by ryao 1y ago
Explain how the German autobahn has fewer collisions than US high ways with lower than 85th percentile speed limits if the lower speed limits are such an advantage. Actual data does not support the idea of low speed limits. They are only in
486.
by ryao 1y ago
It does make sense. See the 85th percentile speed: https://duckduckgo.com/?q=85th+percentile+speed Setting the limit at the 85th percentile and having most drivers drive at it creates uniformity of speed, which is known to
487.
by ryao 1y ago
> The safety argument against speeding is ironclad. Blazing-fast vehicles take longer to brake and exert more force in a crash, thereby endangering everyone else on the roadway. This is not so iron clad if you do some basic reading or th
488.
by ryao 1y ago
Good catch. I had omitted that since I was not familiar with the low level details of the file formats (e.g. would a video file duplicate that data throughout it for enabling live streaming), but if the file only has one copy of important i
489.
by ryao 1y ago
Thanks. I had been unaware of the Starfire/Starcat machines.
490.
by ryao 1y ago
Their view is that if it is out of tree, they will not support it. This supersedes any discussion of license. Even out of tree GPL drivers are not supported by RedHat.
491.
by ryao 1y ago
You have things backward. Licensing has nothing to do with it. Changes to the kernel are unnecessary. Maintaining the code base is also simplified by supporting the various kernel versions the way that they are currently supported.
492.
by ryao 1y ago
Unlike other out of tree filesystems such as Reiser4, the ZFS driver does not patch the kernel sources.
493.
by ryao 1y ago
ZFS would be quite comfortable with the 512MB of RAM on an Apple Watch: https://iosref.com/ram-processor People have run operating systems using ZFS on less.
494.
by ryao 1y ago
I assume that the VM2 project achieved something similar to the ABD changes that were done in OpenZFS. ABD replaced the use of SLAB buffers for ARC with lists of pages. The issue with SLAB buffers is that absurd amounts of work could be don
495.
by ryao 1y ago
Linux’s signed off policy makes that impossible. Linus Torvalds would need Larry Elison’s signed off before even considering it. Linus told me this by email around 2013 (if I recall correctly) when I emailed him to discuss user requests for
496.
by ryao 1y ago
What do you do when you discover that some thing you have not touched in a long time, but suddenly need, is corrupted and all of your backups are corrupt because the corruption happened prior to your 30 day window at OneDrive? You would hav
497.
by ryao 1y ago
> I honestly don't know how robust the image and video formats are to bit corruption. It depends on the format. A BMP image format would limit the damage to 1 pixel, while a JPEG could propagate the damage to potentially the entire
498.
by ryao 1y ago
I have seen people say such things, and none of it was based on reality. They just misinterpreted the performance cliff that data deduplication had to mean you must have absurd amounts of memory even though data deduplication is off by defa
499.
by ryao 1y ago
I did early ZFSOnLinux development on hardware that did not have ECC memory. I once had a situation where a bit flip happened in the ARC buffer for libpython.so and all python software started crashing. Initially, I thought I had hit some s
500.
by ryao 1y ago
RedHat’s policy is no out of tree kernel modules, so it would not have made a difference.
501.
by ryao 1y ago
> There was nothing that specific about Solaris that made sense for ZFS, and even less of a connection to the SPARC architecture. Although it does not change the answer to the original question, I have long been under the impression that
502.
by ryao 1y ago
ZFS has ditto blocks that allows it to self heal in the case of corrupt metadata as long as a good copy remains (and there would be at least 2 copies by default). ZFS only ever needs you to restore from backup if the damage is so severe tha
503.
by ryao 1y ago
The ZFS driver will release memory if the kernel requests it. The only integration level issue is that the free command does not show ARC as a buffer/cache, so it misrepresents reality, but as far as I know, this is an issue with cache
504.
by ryao 1y ago
I have no experience with them but I have heard good things about rsync.net. They use ZFS.
505.
by ryao 1y ago
There is the testimonial on Klara Systems’ website: "The developers at Klara Inc. have been outstanding in helping Wasabi resolve ZFS issues and improve performance. Their understanding of ZFS internals is unmatched anywhere in the ind
506.
by ryao 1y ago
I am curious where you have seen LTO used. Linux distributions and open source projects in general rarely use LTO. Their build systems are usually very good.
507.
by ryao 1y ago
How many Linux distributions use LTO? It is a rarity among Gentoo users as far as I know and that is the one place where you would expect more LTO usage.
508.
by ryao 1y ago
Wasabi uses ZFS while backblaze does not. I wonder if this in any way contributed to the cost differences.
509.
by ryao 1y ago
This is not considering the document as a whole. I will defer to the GCC developers on what the document means on this.
510.
by ryao 1y ago
> by using link-time optimizations These are almost never used by software.

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