Issue
LVE limits, including IO limit, are set but dd test shows higher performance:
ID SPEED PMEM VMEM EP NPROC IO IOPS
migrate 100 2048M 0K 20 100 15360 1024
[root@da75venom ~]# su - migrate
[migrate@da75venom ~]$ dd if=/dev/zero of=test.block bs=1M count=1024 conv=fdatasync
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 6.06703 s, 177 MB/s
Environment
- CloudLinux OS 6/7
Solution
The bug KMODLVE-485 has been fixed and the kernel released to the production. Please perform an update using this link.
Cause
XFS specification.
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