2 ms·

My understanding is not incorrect, please stop assuming that because your understanding is shallow (using consumer-grade information as a reference makes that o

My understanding is not incorrect, please stop assuming that because your understanding is shallow (using consumer-grade information as a reference makes that obvious) that that of others must be as well. I never claimed that you should defragment your SSD, I just pointed out that fragmentation is still an issue on SSDs, which is a true fact. Reading a large fragmented file can be 30% slower than if it is not fragmented. Now if you don't think that's significant, you're just silly.

BizarroLand 4y ago
Well, then, instead of being an abrasive speaker, you should point me to sources that back up your claim. I was able to find a page that talked about write amplification and read speeds decreasing when files are overly fragmented on SSDs, but that was 7 years ago and technologies have improved dramatically since then, not to mention that the effect was found in files split into four hundred thousand pieces, which indicates the slowdown may have been more on the in-drive ASIC not having the throughput needed to deal with that many fragments than with the actual read/write of the disk itself. https://www.overclock.net/threads/yes-file-system-fragmentation-does-affect-ssd-read-speed.1538878/ https://www.overclock.net/threads/yes-file-system-fragmentat... Where's your recent (last 4 years) paper or article that indicates that file fragmentation has anything more than a negligible affect on read/write speeds in an ssd? If you can't put up, then nothing you say matters.
- mgaunard 4y ago
  Do you not understand how file systems work? This is pure logic, no need for any experiment or benchmark. Fragmented files require reading more blocks. The exact scheme depends on the filesystem used. The 30% figure came from an estimation of the ext4 worst case vs best case of number of reads needed.

2 ms·

My understanding is not incorrect, please stop assuming that because your understanding is shallow (using consumer-grade information as a reference makes that o

by mgaunard 4y ago

BizarroLand 4y ago
Well, then, instead of being an abrasive speaker, you should point me to sources that back up your claim. I was able to find a page that talked about write amplification and read speeds decreasing when files are overly fragmented on SSDs, but that was 7 years ago and technologies have improved dramatically since then, not to mention that the effect was found in files split into four hundred thousand pieces, which indicates the slowdown may have been more on the in-drive ASIC not having the throughput needed to deal with that many fragments than with the actual read/write of the disk itself. https://www.overclock.net/threads/yes-file-system-fragmentation-does-affect-ssd-read-speed.1538878/ https://www.overclock.net/threads/yes-file-system-fragmentat... Where's your recent (last 4 years) paper or article that indicates that file fragmentation has anything more than a negligible affect on read/write speeds in an ssd? If you can't put up, then nothing you say matters.
- mgaunard 4y ago
  Do you not understand how file systems work? This is pure logic, no need for any experiment or benchmark. Fragmented files require reading more blocks. The exact scheme depends on the filesystem used. The 30% figure came from an estimation of the ext4 worst case vs best case of number of reads needed.