후지쯔 RX200 S8은 LSI 컨트롤러를 쓰는데
ssd 2개를 연결해서 만든 raid 1의 성능이 너무 나쁘게 나옵니다.
config의 문제는 아닌 것 같은데, 원인이 뭘까요?
6개의 sas를 raid 10으로 걸었더니 435MB/s가 나왔습니다.
WriteBack, ReadAhead, strip size : 64kb
[root@kcolo122-199 ~]# sync && dd if=/dev/zero of=/dd_test bs=4k count=1000000 && sync
1000000+0 records in
1000000+0 records out
4096000000 bytes (4.1 GB) copied, 9.41727 s, 435 MB/s
2개의 micron ssd (500GB)를 1로 걸었더니 38MB/s가 나왔습니다.
WriteBack, ReadAhead, strip size : 64kb (WriteThrough로 바꿔도 성능 개선은 미미하구요)
[root@kcolo122-199 ~]# sync && dd if=/dev/zero of=/data/dd_test bs=4k count=1000000 && sync
1000000+0 records in
1000000+0 records out
4096000000 bytes (4.1 GB) copied, 102.542 s, 39.9 MB/s
ssd volume의 config
Adapter 0 -- Virtual Drive Information:
Virtual Drive: 0 (Target Id: 0)
Name :
RAID Level : Primary-1, Secondary-0, RAID Level Qualifier-0
Size : 476.437 GB
Sector Size : 512
Mirror Data : 476.437 GB
State : Optimal
Strip Size : 64 KB
Number Of Drives : 2
Span Depth : 1
Default Cache Policy: WriteThrough, ReadAheadNone, Direct, No Write Cache if Bad BBU
Current Cache Policy: WriteThrough, ReadAheadNone, Direct, No Write Cache if Bad BBU
Default Access Policy: Read/Write
Current Access Policy: Read/Write
Disk Cache Policy : Disabled
Encryption Type : None
Bad Blocks Exist: No
PI type: No PI
Is VD Cached: No
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RAID 5/6 Ctrl., SAS/SATA 6 Gbit/s, Fujitsu RAID Ctrl SAS 6G 1GB (D3116C), 8 ports int.
RAID level: 0, 1, 10, 5, 50, 6, 60, 1 GB, Optional FBU (based on LSI SAS2208)
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Support for Advanced Software Options
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