hdparm 的效能疑問 - Linux
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By Eden
at 2022-04-04T16:52
at 2022-04-04T16:52
Table of Contents
各位 Linux 大大好
我今天有個特別想問的問題
就是我發現 Mdadm RAID5 效能會有所差異
我以前用 RAID5 with 7 drive 時只有 1000MB/s 左右 (詳細數據沒很清楚)
現在我用 RAID5 with 8 drive 卻跑出 1295MB/s
使用 TOSHIBA 3TB x8 RAID5 硬碟可以跑出 1295MB/s (md1)
但使用 MX500 1TB x2 RAID1 SSD卻只跑出 257.89MB/s (md0)
# hdparm -t /dev/md0
/dev/md0:
HDIO_DRIVE_CMD(identify) failed: Inappropriate ioctl for device
Timing buffered disk reads: 774 MB in 3.00 seconds = 257.89 MB/sec
#hdparm -t /dev/md1
/dev/md1:
HDIO_DRIVE_CMD(identify) failed: Inappropriate ioctl for device
Timing buffered disk reads: 3888 MB in 3.00 seconds = 1295.26 MB/sec
是甚麼原因造成不同 kernel 有所效能差異
因為我記得有段時間 8HDD 的 RAID5 甚至不到 1GB/s
希望大大能提供一點 Kernel 版本號的建議,讓我可以更穩定的在線上
謝謝板
--
我今天有個特別想問的問題
就是我發現 Mdadm RAID5 效能會有所差異
我以前用 RAID5 with 7 drive 時只有 1000MB/s 左右 (詳細數據沒很清楚)
現在我用 RAID5 with 8 drive 卻跑出 1295MB/s
使用 TOSHIBA 3TB x8 RAID5 硬碟可以跑出 1295MB/s (md1)
但使用 MX500 1TB x2 RAID1 SSD卻只跑出 257.89MB/s (md0)
# hdparm -t /dev/md0
/dev/md0:
HDIO_DRIVE_CMD(identify) failed: Inappropriate ioctl for device
Timing buffered disk reads: 774 MB in 3.00 seconds = 257.89 MB/sec
#hdparm -t /dev/md1
/dev/md1:
HDIO_DRIVE_CMD(identify) failed: Inappropriate ioctl for device
Timing buffered disk reads: 3888 MB in 3.00 seconds = 1295.26 MB/sec
是甚麼原因造成不同 kernel 有所效能差異
因為我記得有段時間 8HDD 的 RAID5 甚至不到 1GB/s
希望大大能提供一點 Kernel 版本號的建議,讓我可以更穩定的在線上
謝謝板
--
Tags:
Linux
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By Rosalind
at 2022-04-07T17:33
at 2022-04-07T17:33
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By Oscar
at 2022-04-10T18:13
at 2022-04-10T18:13
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By Vanessa
at 2022-04-13T18:54
at 2022-04-13T18:54
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