Hi All,
Have questions about making raid5 thread use all the cores on my
linux based storage server !
- My storage server has upto 8 cores running linux kernel 2.6.32.27.
- I created a raid5 device of 10 SSDs .
- It seems I only have single raid5 kernel thread, limiting my
WRITE throughput to single cpu core/thread.
Question : What are my options to make my raid5 thread use all the
CPU cores ?
My SSDs can do much more but single raid5 thread
from mdadm is becoming the bottleneck.
To overcome above single-thread-raid5 limitation (for now) I re-configured.
1) I partitioned all my 10 SSDs into 8 partitions:
2) I created 8 raid5 threads. Each raid5 thread having
partition from each of the 8 SSDs
3) My WRITE performance quadrupled because I have 8 RAID5 threads.
Question: Is this workaround a normal practice or may give me
maintenance problems later on.
cheers
vincy F.
chico
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