Why FAT32 R/W performance too low for big file transfer? How can I improve it? [on hold]
I have mounted FAT32 formatted USB storage to ext4 FS and executed a large file copy operation.
Observed that FAT32 R/W performance to ext4 partition is very much slower
than same ext4 partitions .
I've tried various combinations of with mount with ASYNC option and increased the FAT cluster but it didn't help.
Debugged the v4.4.84 kernel and looks like following functions are taking more time:
fat_write_end(){
...
block_write_end(){
...
grab_page_cache_write_begin(){
...
} //+96.923us
} //+168.089us
} //+189.778us
I have used simple copy command. File size is 256 mb with bs of 64K.
Could you please suggest how to improve the performance?
Help is greatly appreciated!
kernel filesystem fat32
asked Jan 11 at 14:28
chinmoy ghoshchinmoy ghosh
11
New contributor
chinmoy ghosh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
put on hold as unclear what you're asking by Charles Green, Kulfy, Terrance, karel, Eric Carvalho Jan 11 at 15:57
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
add a comment |
I have mounted FAT32 formatted USB storage to ext4 FS and executed a large file copy operation.
Observed that FAT32 R/W performance to ext4 partition is very much slower
than same ext4 partitions .
I've tried various combinations of with mount with ASYNC option and increased the FAT cluster but it didn't help.
Debugged the v4.4.84 kernel and looks like following functions are taking more time:
fat_write_end(){
...
block_write_end(){
...
grab_page_cache_write_begin(){
...
} //+96.923us
} //+168.089us
} //+189.778us
I have used simple copy command. File size is 256 mb with bs of 64K.
Could you please suggest how to improve the performance?
Help is greatly appreciated!
kernel filesystem fat32
asked Jan 11 at 14:28
chinmoy ghoshchinmoy ghosh
11
New contributor
chinmoy ghosh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
put on hold as unclear what you're asking by Charles Green, Kulfy, Terrance, karel, Eric Carvalho Jan 11 at 15:57
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
Updated my queries . Hope my query is clear now.
– chinmoy ghosh
yesterday
How exactly are you copying the file(s) in question between the various file systems?
– David Foerster
16 hours ago
Thanks for the asking. I have used simple copy command. File size is 256 mb with bs of 64K.
– chinmoy ghosh
14 hours ago
Could you please edit your post when you want to clarify something or add information? It’s best to have everything relevant in one place. Additionally, comments may be deleted for various reasons. Thanks.
– David Foerster
13 hours ago
add a comment |
I have mounted FAT32 formatted USB storage to ext4 FS and executed a large file copy operation.
Observed that FAT32 R/W performance to ext4 partition is very much slower
than same ext4 partitions .
I've tried various combinations of with mount with ASYNC option and increased the FAT cluster but it didn't help.
Debugged the v4.4.84 kernel and looks like following functions are taking more time:
fat_write_end(){
...
block_write_end(){
...
grab_page_cache_write_begin(){
...
} //+96.923us
} //+168.089us
} //+189.778us
I have used simple copy command. File size is 256 mb with bs of 64K.
Could you please suggest how to improve the performance?
Help is greatly appreciated!
kernel filesystem fat32
asked Jan 11 at 14:28
chinmoy ghoshchinmoy ghosh
11
New contributor
chinmoy ghosh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I have mounted FAT32 formatted USB storage to ext4 FS and executed a large file copy operation.
Observed that FAT32 R/W performance to ext4 partition is very much slower
than same ext4 partitions .
I've tried various combinations of with mount with ASYNC option and increased the FAT cluster but it didn't help.
Debugged the v4.4.84 kernel and looks like following functions are taking more time:
fat_write_end(){
...
block_write_end(){
...
grab_page_cache_write_begin(){
...
} //+96.923us
} //+168.089us
} //+189.778us
I have used simple copy command. File size is 256 mb with bs of 64K.
Could you please suggest how to improve the performance?
Help is greatly appreciated!
kernel filesystem fat32
kernel filesystem fat32
asked Jan 11 at 14:28
chinmoy ghoshchinmoy ghosh
11
New contributor
chinmoy ghosh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked Jan 11 at 14:28
chinmoy ghoshchinmoy ghosh
11
New contributor
chinmoy ghosh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 13 hours ago
chinmoy ghosh
asked Jan 11 at 14:28
chinmoy ghoshchinmoy ghosh
11
New contributor
chinmoy ghosh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked Jan 11 at 14:28
chinmoy ghoshchinmoy ghosh
11
asked Jan 11 at 14:28
chinmoy ghoshchinmoy ghosh
11
11
New contributor
chinmoy ghosh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
chinmoy ghosh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
chinmoy ghosh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
put on hold as unclear what you're asking by Charles Green, Kulfy, Terrance, karel, Eric Carvalho Jan 11 at 15:57
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
put on hold as unclear what you're asking by Charles Green, Kulfy, Terrance, karel, Eric Carvalho Jan 11 at 15:57
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
Updated my queries . Hope my query is clear now.
– chinmoy ghosh
yesterday
How exactly are you copying the file(s) in question between the various file systems?
– David Foerster
16 hours ago
Thanks for the asking. I have used simple copy command. File size is 256 mb with bs of 64K.
– chinmoy ghosh
14 hours ago
Could you please edit your post when you want to clarify something or add information? It’s best to have everything relevant in one place. Additionally, comments may be deleted for various reasons. Thanks.
– David Foerster
13 hours ago
add a comment |
Updated my queries . Hope my query is clear now.
– chinmoy ghosh
yesterday
How exactly are you copying the file(s) in question between the various file systems?
– David Foerster
16 hours ago
Thanks for the asking. I have used simple copy command. File size is 256 mb with bs of 64K.
– chinmoy ghosh
14 hours ago
Could you please edit your post when you want to clarify something or add information? It’s best to have everything relevant in one place. Additionally, comments may be deleted for various reasons. Thanks.
– David Foerster
13 hours ago
Updated my queries . Hope my query is clear now.
– chinmoy ghosh
yesterday
Updated my queries . Hope my query is clear now.
– chinmoy ghosh
yesterday
How exactly are you copying the file(s) in question between the various file systems?
– David Foerster
16 hours ago
How exactly are you copying the file(s) in question between the various file systems?
– David Foerster
16 hours ago
Thanks for the asking. I have used simple copy command. File size is 256 mb with bs of 64K.
– chinmoy ghosh
14 hours ago
Thanks for the asking. I have used simple copy command. File size is 256 mb with bs of 64K.
– chinmoy ghosh
14 hours ago
Could you please edit your post when you want to clarify something or add information? It’s best to have everything relevant in one place. Additionally, comments may be deleted for various reasons. Thanks.
– David Foerster
13 hours ago
Could you please edit your post when you want to clarify something or add information? It’s best to have everything relevant in one place. Additionally, comments may be deleted for various reasons. Thanks.
– David Foerster
13 hours ago
add a comment |
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Updated my queries . Hope my query is clear now.
– chinmoy ghosh
yesterday
How exactly are you copying the file(s) in question between the various file systems?
– David Foerster
16 hours ago
Thanks for the asking. I have used simple copy command. File size is 256 mb with bs of 64K.
– chinmoy ghosh
14 hours ago
Could you please edit your post when you want to clarify something or add information? It’s best to have everything relevant in one place. Additionally, comments may be deleted for various reasons. Thanks.
– David Foerster
13 hours ago