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Read-only filesystem for fastest boot?
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I'm trying to figure out which read-only filesystem I should use to achieve fastest possible boot time in a stripped down embedded system using the Raspberry Pi Zero W (with the OS booting from the SD card).
cramfs and squashfs seem like good candidates, however I have no need to save space on the SD card and I'm concerned that decompressing the filesystem at each boot will slow things down.
Basic Linux permission and metadata support would be a plus as it will be used to mount the root system.
embedded
asked 1 hour ago
Jeremiah RoseJeremiah Rose
1062
New contributor
Jeremiah Rose is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I'm trying to figure out which read-only filesystem I should use to achieve fastest possible boot time in a stripped down embedded system using the Raspberry Pi Zero W (with the OS booting from the SD card).
cramfs and squashfs seem like good candidates, however I have no need to save space on the SD card and I'm concerned that decompressing the filesystem at each boot will slow things down.
Basic Linux permission and metadata support would be a plus as it will be used to mount the root system.
embedded
asked 1 hour ago
Jeremiah RoseJeremiah Rose
1062
New contributor
Jeremiah Rose is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Decompression has a cost, but reading from flash has a cost too, and you do more of that when data is not compressed. To add to the confusion, SD performance varies wildly from model to model and brand to brand. There is no way to get a correct answer without benchmarking your specific hardware.
– Oh My Goodness
56 mins ago
Yes I think you're right, a correct answer to this question will require actual benchmarks on a Rpi0w. Other things to take into account is the availability / use of XIP, and the ability to store the OS' critical boot data sequentially.
– Jeremiah Rose
6 mins ago
add a comment |
I'm trying to figure out which read-only filesystem I should use to achieve fastest possible boot time in a stripped down embedded system using the Raspberry Pi Zero W (with the OS booting from the SD card).
cramfs and squashfs seem like good candidates, however I have no need to save space on the SD card and I'm concerned that decompressing the filesystem at each boot will slow things down.
Basic Linux permission and metadata support would be a plus as it will be used to mount the root system.
embedded
asked 1 hour ago
Jeremiah RoseJeremiah Rose
1062
New contributor
Jeremiah Rose is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I'm trying to figure out which read-only filesystem I should use to achieve fastest possible boot time in a stripped down embedded system using the Raspberry Pi Zero W (with the OS booting from the SD card).
cramfs and squashfs seem like good candidates, however I have no need to save space on the SD card and I'm concerned that decompressing the filesystem at each boot will slow things down.
Basic Linux permission and metadata support would be a plus as it will be used to mount the root system.
embedded
embedded
asked 1 hour ago
Jeremiah RoseJeremiah Rose
1062
New contributor
Jeremiah Rose is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
Jeremiah RoseJeremiah Rose
1062
New contributor
Jeremiah Rose is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
Jeremiah RoseJeremiah Rose
1062
New contributor
Jeremiah Rose is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 1 hour ago
Jeremiah RoseJeremiah Rose
1062
asked 1 hour ago
Jeremiah RoseJeremiah Rose
1062
1062
New contributor
Jeremiah Rose is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Jeremiah Rose is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Decompression has a cost, but reading from flash has a cost too, and you do more of that when data is not compressed. To add to the confusion, SD performance varies wildly from model to model and brand to brand. There is no way to get a correct answer without benchmarking your specific hardware.
– Oh My Goodness
56 mins ago
Yes I think you're right, a correct answer to this question will require actual benchmarks on a Rpi0w. Other things to take into account is the availability / use of XIP, and the ability to store the OS' critical boot data sequentially.
– Jeremiah Rose
6 mins ago
add a comment |
Decompression has a cost, but reading from flash has a cost too, and you do more of that when data is not compressed. To add to the confusion, SD performance varies wildly from model to model and brand to brand. There is no way to get a correct answer without benchmarking your specific hardware.
– Oh My Goodness
56 mins ago
Yes I think you're right, a correct answer to this question will require actual benchmarks on a Rpi0w. Other things to take into account is the availability / use of XIP, and the ability to store the OS' critical boot data sequentially.
– Jeremiah Rose
6 mins ago
Decompression has a cost, but reading from flash has a cost too, and you do more of that when data is not compressed. To add to the confusion, SD performance varies wildly from model to model and brand to brand. There is no way to get a correct answer without benchmarking your specific hardware.
– Oh My Goodness
56 mins ago
Decompression has a cost, but reading from flash has a cost too, and you do more of that when data is not compressed. To add to the confusion, SD performance varies wildly from model to model and brand to brand. There is no way to get a correct answer without benchmarking your specific hardware.
– Oh My Goodness
56 mins ago
Yes I think you're right, a correct answer to this question will require actual benchmarks on a Rpi0w. Other things to take into account is the availability / use of XIP, and the ability to store the OS' critical boot data sequentially.
– Jeremiah Rose
6 mins ago
Yes I think you're right, a correct answer to this question will require actual benchmarks on a Rpi0w. Other things to take into account is the availability / use of XIP, and the ability to store the OS' critical boot data sequentially.
– Jeremiah Rose
6 mins ago
add a comment |
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Decompression has a cost, but reading from flash has a cost too, and you do more of that when data is not compressed. To add to the confusion, SD performance varies wildly from model to model and brand to brand. There is no way to get a correct answer without benchmarking your specific hardware.
– Oh My Goodness
56 mins ago
Yes I think you're right, a correct answer to this question will require actual benchmarks on a Rpi0w. Other things to take into account is the availability / use of XIP, and the ability to store the OS' critical boot data sequentially.
– Jeremiah Rose
6 mins ago