Does storage affect file caching in cp?
I read somewhere that cp uses file caching, but why does coping something the size of ~100MB result in a file cache of more than 100MB in ram? Does this also change if copying from HDD -> HDD,SSD -> SSD,HDD -> SSD, and maybe another storage medium?
cache storage cp io
edited Dec 17 at 3:23
muru
1
asked Dec 17 at 3:15
MrWm
3514
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I read somewhere that cp uses file caching, but why does coping something the size of ~100MB result in a file cache of more than 100MB in ram? Does this also change if copying from HDD -> HDD,SSD -> SSD,HDD -> SSD, and maybe another storage medium?
cache storage cp io
edited Dec 17 at 3:23
muru
1
asked Dec 17 at 3:15
MrWm
3514
add a comment |
I read somewhere that cp uses file caching, but why does coping something the size of ~100MB result in a file cache of more than 100MB in ram? Does this also change if copying from HDD -> HDD,SSD -> SSD,HDD -> SSD, and maybe another storage medium?
cache storage cp io
edited Dec 17 at 3:23
muru
1
asked Dec 17 at 3:15
MrWm
3514
I read somewhere that cp uses file caching, but why does coping something the size of ~100MB result in a file cache of more than 100MB in ram? Does this also change if copying from HDD -> HDD,SSD -> SSD,HDD -> SSD, and maybe another storage medium?
cache storage cp io
cache storage cp io
edited Dec 17 at 3:23
muru
1
asked Dec 17 at 3:15
MrWm
3514
edited Dec 17 at 3:23
muru
1
asked Dec 17 at 3:15
MrWm
3514
edited Dec 17 at 3:23
muru
1
edited Dec 17 at 3:23
muru
1
edited Dec 17 at 3:23
muru
1
1
asked Dec 17 at 3:15
MrWm
3514
asked Dec 17 at 3:15
MrWm
3514
asked Dec 17 at 3:15
MrWm
3514
3514
add a comment |
add a comment |
1 Answer
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Since source disk is buffered and destination disk is also buffered, it is normal that peak buffer usage exceeds the file size. If you use mv then source disk cache should be dropped immediately after file deletion.
Storage type would not affect disk cache much, the file system you choose will.
answered Dec 17 at 7:29
Alvin Liang
6618
add a comment |
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1 Answer
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Since source disk is buffered and destination disk is also buffered, it is normal that peak buffer usage exceeds the file size. If you use mv then source disk cache should be dropped immediately after file deletion.
Storage type would not affect disk cache much, the file system you choose will.
answered Dec 17 at 7:29
Alvin Liang
6618
add a comment |
Since source disk is buffered and destination disk is also buffered, it is normal that peak buffer usage exceeds the file size. If you use mv then source disk cache should be dropped immediately after file deletion.
Storage type would not affect disk cache much, the file system you choose will.
answered Dec 17 at 7:29
Alvin Liang
6618
add a comment |
Since source disk is buffered and destination disk is also buffered, it is normal that peak buffer usage exceeds the file size. If you use mv then source disk cache should be dropped immediately after file deletion.
Storage type would not affect disk cache much, the file system you choose will.
answered Dec 17 at 7:29
Alvin Liang
6618
Since source disk is buffered and destination disk is also buffered, it is normal that peak buffer usage exceeds the file size. If you use mv then source disk cache should be dropped immediately after file deletion.
Storage type would not affect disk cache much, the file system you choose will.
answered Dec 17 at 7:29
Alvin Liang
6618
answered Dec 17 at 7:29
Alvin Liang
6618
answered Dec 17 at 7:29
Alvin Liang
6618
answered Dec 17 at 7:29
Alvin Liang
6618
6618
add a comment |
add a comment |
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