File Copy Speed Isuue
Posted: 2019/04/23 11:36:03
HI,
I'm trying to copy 12TB of 32GB files.
Configuration "Storage A" is connected to 8G speed SAN and "Storage B" is connected to DAS at 8G speed.
The storage is all "ALL-FLASH" model and OS version is CentOS6.6
I checked three cases.
Case 1:
"Storage A" connected to SAN Single volume 15TB volume (gfs2)
- Local Server --> "Storage A" (gfs2)
- Speed of cp or rsync command : 400Mb/s
Case 2:
"Storage A" connected to SAN Single volume 15TB volume (ext4)
- Local Server --> "Storage A" (ext4)
- Speed of cp or rsync command : 200Mb/s
Case 3:
DAS connected "Storage B" Single size 15TB volume (ext4)
- Local Server --> "Storage A" (ext4)
- Speed of cp or rsync command : 200Mb/s
I do not understand. Even if there is a difference between ext4 and gfs2,
the speed differs by a factor of two. It is also slower than a SAN or DAS at 8G.
What should I identify?
For example, kernel tuning, file system reconfiguration, and so on ...
Thank you
I'm trying to copy 12TB of 32GB files.
Configuration "Storage A" is connected to 8G speed SAN and "Storage B" is connected to DAS at 8G speed.
The storage is all "ALL-FLASH" model and OS version is CentOS6.6
I checked three cases.
Case 1:
"Storage A" connected to SAN Single volume 15TB volume (gfs2)
- Local Server --> "Storage A" (gfs2)
- Speed of cp or rsync command : 400Mb/s
Case 2:
"Storage A" connected to SAN Single volume 15TB volume (ext4)
- Local Server --> "Storage A" (ext4)
- Speed of cp or rsync command : 200Mb/s
Case 3:
DAS connected "Storage B" Single size 15TB volume (ext4)
- Local Server --> "Storage A" (ext4)
- Speed of cp or rsync command : 200Mb/s
I do not understand. Even if there is a difference between ext4 and gfs2,
the speed differs by a factor of two. It is also slower than a SAN or DAS at 8G.
What should I identify?
For example, kernel tuning, file system reconfiguration, and so on ...
Thank you