Register for the iXsystems Community to get an ad-free experience

Striped-RAIDZ2 Array performance Q

Status
Not open for further replies.

wtfR6a

Explorer
Joined
Jan 9, 2016
Messages
88
Built a new media server, had some issues getting the perf where I think it should be and can't make sense of these test results from our grinches rather useful script.

HW spec, e5-1650v3, 256GB RAM, 3*9207-8i HBA in latest IT mode, No SLOG/ZIL at this stage.
Array is created with 24 drives in 3 * 8 disk RAIDZ2 arrays.

Code:
Selected disks: da0 da1 da2 da3 da4 da5 da6 da7 da8 da9 da10 da11 da12 da13 da14 da15 da16 da17 da18 da19 da20 da21 da22 da23
<ATA ST4000LM016-1N21 0003>		at scbus0 target 7 lun 0 (pass0,da0)
<ATA ST4000LM016-1N21 0003>		at scbus0 target 8 lun 0 (pass1,da1)
<ATA ST4000LM016-1N21 0003>		at scbus0 target 9 lun 0 (pass2,da2)
<ATA ST4000LM016-1N21 0003>		at scbus0 target 10 lun 0 (pass3,da3)
<ATA ST4000LM016-1N21 0003>		at scbus0 target 11 lun 0 (pass4,da4)
<ATA ST4000LM016-1N21 0003>		at scbus0 target 12 lun 0 (pass5,da5)
<ATA ST4000LM016-1N21 0003>		at scbus0 target 13 lun 0 (pass6,da6)
<ATA ST4000LM016-1N21 0003>		at scbus0 target 14 lun 0 (pass7,da7)
<ATA ST4000LM016-1N21 0003>		at scbus1 target 0 lun 0 (pass8,da8)
<ATA ST4000LM016-1N21 0003>		at scbus1 target 1 lun 0 (pass9,da9)
<ATA ST4000LM016-1N21 0003>		at scbus1 target 2 lun 0 (pass10,da10)
<ATA ST4000LM016-1N21 0003>		at scbus1 target 3 lun 0 (pass11,da11)
<ATA ST4000LM016-1N21 0003>		at scbus1 target 4 lun 0 (pass12,da12)
<ATA ST4000LM016-1N21 0003>		at scbus1 target 5 lun 0 (pass13,da13)
<ATA ST4000LM016-1N21 0003>		at scbus1 target 6 lun 0 (pass14,da14)
<ATA ST4000LM016-1N21 0003>		at scbus1 target 7 lun 0 (pass15,da15)
<ATA ST4000LM016-1N21 0003>		at scbus2 target 4 lun 0 (pass16,da16)
<ATA ST4000LM016-1N21 0003>		at scbus2 target 5 lun 0 (pass17,da17)
<ATA ST4000LM016-1N21 0003>		at scbus2 target 6 lun 0 (pass18,da18)
<ATA ST4000LM016-1N21 0003>		at scbus2 target 7 lun 0 (pass19,da19)
<ATA ST4000LM016-1N21 0003>		at scbus2 target 8 lun 0 (pass20,da20)
<ATA ST4000LM016-1N21 0003>		at scbus2 target 9 lun 0 (pass21,da21)
<ATA ST4000LM016-1N21 0003>		at scbus2 target 10 lun 0 (pass22,da22)
<ATA ST4000LM016-1N21 0003>		at scbus2 target 11 lun 0 (pass23,da23)



Would appreciate some troubleshooting from the experts here!

Each drive individually checks out at 80 and 140MB/s. da23 appears an outlier here but wasn't like this on a previous run. Maybe thats indicative of a intermittent problem?

Code:
Completed: initial serial array read (baseline speeds)

Array's average speed is 123.139 MB/sec per disk

Disk	Disk Size  MB/sec %ofAvg
------- ---------- ------ ------
da0	  3815447MB	124	101
da1	  3815447MB	125	101
da2	  3815447MB	125	102
da3	  3815447MB	124	101
da4	  3815447MB	125	101
da5	  3815447MB	117	 95
da6	  3815447MB	124	100
da7	  3815447MB	124	101
da8	  3815447MB	124	100
da9	  3815447MB	127	103
da10	 3815447MB	125	101
da11	 3815447MB	122	 99
da12	 3815447MB	122	 99
da13	 3815447MB	126	102
da14	 3815447MB	126	103
da15	 3815447MB	121	 99
da16	 3815447MB	129	105
da17	 3815447MB	126	102
da18	 3815447MB	122	 99
da19	 3815447MB	118	 96
da20	 3815447MB	129	104
da21	 3815447MB	123	100
da22	 3815447MB	128	104
da23	 3815447MB	100	 81 --SLOW--


Parallel test looks to be fine, even drive da23 picked up to a normal range.

Code:
Performing initial parallel array read
Sat Oct 22 10:17:57 EDT 2016
The disk da0 appears to be 3815447 MB.
Disk is reading at about 122 MB/sec
This suggests that this pass may take around 521 minutes

				   Serial Parall % of
Disk	Disk Size  MB/sec MB/sec Serial
------- ---------- ------ ------ ------
da0	  3815447MB	124	121	 97
da1	  3815447MB	125	127	102
da2	  3815447MB	125	135	107 ++FAST++
da3	  3815447MB	124	124	100
da4	  3815447MB	125	124	 99
da5	  3815447MB	117	128	110 ++FAST++
da6	  3815447MB	124	118	 95
da7	  3815447MB	124	125	101
da8	  3815447MB	124	128	103
da9	  3815447MB	127	124	 98
da10	 3815447MB	125	130	104
da11	 3815447MB	122	127	104
da12	 3815447MB	122	127	104
da13	 3815447MB	126	124	 99
da14	 3815447MB	126	127	100
da15	 3815447MB	121	130	107 ++FAST++
da16	 3815447MB	129	130	101
da17	 3815447MB	126	127	101
da18	 3815447MB	122	129	106
da19	 3815447MB	118	131	111 ++FAST++
da20	 3815447MB	129	124	 97
da21	 3815447MB	123	123	100
da22	 3815447MB	128	130	101
da23	 3815447MB	100	121	121 ++FAST++



initial parallel read...

Code:
Awaiting completion: initial parallel array read
Sat Oct 22 21:59:47 EDT 2016
Completed: initial parallel array read

Disk's average time is 40370 seconds per disk

Disk	Bytes Transferred Seconds %ofAvg
------- ----------------- ------- ------
da0		 4000787030016   40482	100
da1		 4000787030016   41139	102
da2		 4000787030016   38910	 96
da3		 4000787030016   40623	101
da4		 4000787030016   40159	 99
da5		 4000787030016   41656	103
da6		 4000787030016   41256	102
da7		 4000787030016   40390	100
da8		 4000787030016   40299	100
da9		 4000787030016   39488	 98
da10		4000787030016   40484	100
da11		4000787030016   40090	 99
da12		4000787030016   40582	101
da13		4000787030016   40242	100
da14		4000787030016   41080	102
da15		4000787030016   41234	102
da16		4000787030016   38779	 96
da17		4000787030016   40054	 99
da18		4000787030016   40452	100
da19		4000787030016   38872	 96
da20		4000787030016   40813	101
da21		4000787030016   40842	101
da22		4000787030016   38845	 96
da23		4000787030016   42110	104


Parallel seek stress shows lowe MB/s
Code:
Performing initial parallel seek-stress array read
Sat Oct 22 21:59:47 EDT 2016
The disk da0 appears to be 3815447 MB.
Disk is reading at about 17 MB/sec
This suggests that this pass may take around 3792 minutes

				   Serial Parall % of
Disk	Disk Size  MB/sec MB/sec Serial
------- ---------- ------ ------ ------
da0	  3815447MB	124	 16	 13
da1	  3815447MB	125	 16	 13
da2	  3815447MB	125	 18	 14
da3	  3815447MB	124	 17	 13
da4	  3815447MB	125	 15	 12
da5	  3815447MB	117	 16	 13
da6	  3815447MB	124	 17	 14
da7	  3815447MB	124	 15	 12
da8	  3815447MB	124	 15	 12
da9	  3815447MB	127	 15	 12
da10	 3815447MB	125	 19	 15
da11	 3815447MB	122	 16	 13
da12	 3815447MB	122	 16	 13
da13	 3815447MB	126	 13	 11
da14	 3815447MB	126	 17	 14
da15	 3815447MB	121	 15	 13
da16	 3815447MB	129	 17	 13
da17	 3815447MB	126	 14	 11
da18	 3815447MB	122	 16	 13
da19	 3815447MB	118	 17	 14
da20	 3815447MB	129	 17	 13
da21	 3815447MB	123	 16	 13
da22	 3815447MB	128	 16	 13
da23	 3815447MB	100	 16	 16



I've added an image of da0 here which shows the low parallel stress test read.

da0.png


Camcontrol identity da0

Code:
pass0: <ST4000LM016-1N2170 0003> ACS-2 ATA SATA 3.x device
pass0: 600.000MB/s transfers, Command Queueing Enabled

protocol			  ATA/ATAPI-9 SATA 3.x
device model		  ST4000LM016-1N2170
firmware revision	 0003
serial number		 W8011VJD
WWN				   5000c5009b418896
cylinders			 16383
heads				 16
sectors/track		 63
sector size		   logical 512, physical 4096, offset 0
LBA supported		 268435455 sectors
LBA48 supported	   7814037168 sectors
PIO supported		 PIO4
DMA supported		 WDMA2 UDMA6
media RPM			 5400

Feature					  Support  Enabled   Value		   Vendor
read ahead					 yes	yes
write cache					yes	yes
flush cache					yes	yes
overlap						no
Tagged Command Queuing (TCQ)   no	no
Native Command Queuing (NCQ)   yes		32 tags
NCQ Queue Management		   no
NCQ Streaming				  no
Receive & Send FPDMA Queued	no
SMART						  yes	yes
microcode download			 yes	yes
security					   yes	no
power management			   yes	yes
advanced power management	  yes	no	0/0x00
automatic acoustic management  no	no
media status notification	  no	no
power-up in Standby			yes	no
write-read-verify			  yes	yes	2/0x2
unload						 no	no
general purpose logging		yes	yes
free-fall					  no	no
Data Set Management (DSM/TRIM) no
Host Protected Area (HPA)	  yes	  no	  7814037168/7814037168
HPA - Security				 no


CPU load is low, RAM use is low....

htop.png



With regular black magic speed tests, Im seeing a read write from this array over 10gig networking of 250MB/s read and write. My 10g networking iperf 's at 9.xgbps so thats not the limitation here.




any pointers appreciated.....thanks in adv.
 
Last edited:

SweetAndLow

Sweet'NASty
Joined
Nov 6, 2013
Messages
6,415
Try using iozone to test pool performance locally. It can use specific block sizes which will affect performance. There is also a 10 gigE thread on here talking about tuning. I know it takes some special tweaks to get perf up.

Sent from my Nexus 5X using Tapatalk
 

wtfR6a

Explorer
Joined
Jan 9, 2016
Messages
88
Greco's script does run locally which verified the low array performance I am seeing from networked devices.

Runing zsync or duplication to this array from my old 10 disk RaidZ2 results in a write speed of around 12MB/s when I know the source volume is reading and outputting at 500MB/s+
Accessing from my desktop I see a better 250MB/s but I would have expected 24 drives in three striped to have outperformed a single 10 disk RAIDZ2 hence why I started with this local testing.

I'm also going and test one drive with two parallel dd threads and see if I see the results which were reported here
https://forums.freenas.org/index.ph...server-performance-tests-weird-results.30142/

EDIT: tested with dual 'dd' reads on a disk in the array.
Single 'dd if=/dev/da3 of=/dev/null bs=8M' reads at 120MB/s all day long.
Start a second 'dd if=/dev/da3 of=/dev/null bs=8M' and read speed plummets to circa 12MB/s.
Cancel one 'dd' and speed returns to 120MB/s

paraccess.png


I'm not using a multiplexing backing, a plain '216A' model with 3*9207 HBA with correct firmware.

I'll try iozone and see if it sheds any light.
 
Last edited:

Stux

MVP
Joined
Jun 2, 2016
Messages
4,248
Is it just the one drive that has the issue?
 

wtfR6a

Explorer
Joined
Jan 9, 2016
Messages
88
nope, all of them.
 

Stux

MVP
Joined
Jun 2, 2016
Messages
4,248
Wait a sec...

Single 'dd if=/dev/da3 of=/dev/null bs=8M' reads at 120MB/s all day long.
Start a second 'dd if=/dev/da3 of=/dev/null bs=8M' and read speed plummets to circa 12MB/s.
Cancel one 'dd' and speed returns to 120MB/s

You're reading from the same disk at 2 different locations.

That's expected behaviour on an HD.

Do it via ZFS/ARC and it would be fine (providing the ARC was big enough) ;)
 

wtfR6a

Explorer
Joined
Jan 9, 2016
Messages
88
It should be mitigated from this level of impact with NCQ and a bunch of other smart stuff though - or at least as per my idiot understanding!
Heres my backup system of 10 x Red TB doing the exact same test. The area in the red box is where the second instance was running.

sys2parread.png


any thoughts why a much lower spec system should exhibit significantly better performance?

3x8x4 RZ2 = 256MB r/w
1x10 RZ2 = 500MB/s r/w +
 

Stux

MVP
Joined
Jun 2, 2016
Messages
4,248
I would think it would depend on how big a gap you left before starting the second instance.

I can't see how a drive could mitigate it once its drive cache has filled up
 

wtfR6a

Explorer
Joined
Jan 9, 2016
Messages
88
Tested this same drive on a Ubuntu bootable USB image and benchmarked at 120MB/s single 'dd', and 32MB/s dual 'dd' so 3x increase over when connected to FreeNAS, is this possibly a driver issue which I think what the issue was for the OP of the thread I linked previously.
 

Attachments

  • test2.txt
    25.6 KB · Views: 260

nev_neo

Dabbler
Joined
May 18, 2016
Messages
12
This is interesting.
Do you have any info on the commands that you ran to get these results ?
I'm trying to test out my array of cheap 2TB newegg drives.
I've run the smartclt tests and they came out good.. but it seems 1 or 2 of these drives are noisier than the other.. not sure if that even possible.


Built a new media server, had some issues getting the perf where I think it should be and can't make sense of these test results from our grinches rather useful script.

HW spec, e5-1650v3, 256GB RAM, 3*9207-8i HBA in latest IT mode, No SLOG/ZIL at this stage.
Array is created with 24 drives in 3 * 8 disk RAIDZ2 arrays.

Code:
Selected disks: da0 da1 da2 da3 da4 da5 da6 da7 da8 da9 da10 da11 da12 da13 da14 da15 da16 da17 da18 da19 da20 da21 da22 da23
<ATA ST4000LM016-1N21 0003>		at scbus0 target 7 lun 0 (pass0,da0)
<ATA ST4000LM016-1N21 0003>		at scbus0 target 8 lun 0 (pass1,da1)
<ATA ST4000LM016-1N21 0003>		at scbus0 target 9 lun 0 (pass2,da2)
<ATA ST4000LM016-1N21 0003>		at scbus0 target 10 lun 0 (pass3,da3)
<ATA ST4000LM016-1N21 0003>		at scbus0 target 11 lun 0 (pass4,da4)
<ATA ST4000LM016-1N21 0003>		at scbus0 target 12 lun 0 (pass5,da5)
<ATA ST4000LM016-1N21 0003>		at scbus0 target 13 lun 0 (pass6,da6)
<ATA ST4000LM016-1N21 0003>		at scbus0 target 14 lun 0 (pass7,da7)
<ATA ST4000LM016-1N21 0003>		at scbus1 target 0 lun 0 (pass8,da8)
<ATA ST4000LM016-1N21 0003>		at scbus1 target 1 lun 0 (pass9,da9)
<ATA ST4000LM016-1N21 0003>		at scbus1 target 2 lun 0 (pass10,da10)
<ATA ST4000LM016-1N21 0003>		at scbus1 target 3 lun 0 (pass11,da11)
<ATA ST4000LM016-1N21 0003>		at scbus1 target 4 lun 0 (pass12,da12)
<ATA ST4000LM016-1N21 0003>		at scbus1 target 5 lun 0 (pass13,da13)
<ATA ST4000LM016-1N21 0003>		at scbus1 target 6 lun 0 (pass14,da14)
<ATA ST4000LM016-1N21 0003>		at scbus1 target 7 lun 0 (pass15,da15)
<ATA ST4000LM016-1N21 0003>		at scbus2 target 4 lun 0 (pass16,da16)
<ATA ST4000LM016-1N21 0003>		at scbus2 target 5 lun 0 (pass17,da17)
<ATA ST4000LM016-1N21 0003>		at scbus2 target 6 lun 0 (pass18,da18)
<ATA ST4000LM016-1N21 0003>		at scbus2 target 7 lun 0 (pass19,da19)
<ATA ST4000LM016-1N21 0003>		at scbus2 target 8 lun 0 (pass20,da20)
<ATA ST4000LM016-1N21 0003>		at scbus2 target 9 lun 0 (pass21,da21)
<ATA ST4000LM016-1N21 0003>		at scbus2 target 10 lun 0 (pass22,da22)
<ATA ST4000LM016-1N21 0003>		at scbus2 target 11 lun 0 (pass23,da23)



Would appreciate some troubleshooting from the experts here!

Each drive individually checks out at 80 and 140MB/s. da23 appears an outlier here but wasn't like this on a previous run. Maybe thats indicative of a intermittent problem?

Code:
Completed: initial serial array read (baseline speeds)

Array's average speed is 123.139 MB/sec per disk

Disk	Disk Size  MB/sec %ofAvg
------- ---------- ------ ------
da0	  3815447MB	124	101
da1	  3815447MB	125	101
da2	  3815447MB	125	102
da3	  3815447MB	124	101
da4	  3815447MB	125	101
da5	  3815447MB	117	 95
da6	  3815447MB	124	100
da7	  3815447MB	124	101
da8	  3815447MB	124	100
da9	  3815447MB	127	103
da10	 3815447MB	125	101
da11	 3815447MB	122	 99
da12	 3815447MB	122	 99
da13	 3815447MB	126	102
da14	 3815447MB	126	103
da15	 3815447MB	121	 99
da16	 3815447MB	129	105
da17	 3815447MB	126	102
da18	 3815447MB	122	 99
da19	 3815447MB	118	 96
da20	 3815447MB	129	104
da21	 3815447MB	123	100
da22	 3815447MB	128	104
da23	 3815447MB	100	 81 --SLOW--


Parallel test looks to be fine, even drive da23 picked up to a normal range.

Code:
Performing initial parallel array read
Sat Oct 22 10:17:57 EDT 2016
The disk da0 appears to be 3815447 MB.
Disk is reading at about 122 MB/sec
This suggests that this pass may take around 521 minutes

				   Serial Parall % of
Disk	Disk Size  MB/sec MB/sec Serial
------- ---------- ------ ------ ------
da0	  3815447MB	124	121	 97
da1	  3815447MB	125	127	102
da2	  3815447MB	125	135	107 ++FAST++
da3	  3815447MB	124	124	100
da4	  3815447MB	125	124	 99
da5	  3815447MB	117	128	110 ++FAST++
da6	  3815447MB	124	118	 95
da7	  3815447MB	124	125	101
da8	  3815447MB	124	128	103
da9	  3815447MB	127	124	 98
da10	 3815447MB	125	130	104
da11	 3815447MB	122	127	104
da12	 3815447MB	122	127	104
da13	 3815447MB	126	124	 99
da14	 3815447MB	126	127	100
da15	 3815447MB	121	130	107 ++FAST++
da16	 3815447MB	129	130	101
da17	 3815447MB	126	127	101
da18	 3815447MB	122	129	106
da19	 3815447MB	118	131	111 ++FAST++
da20	 3815447MB	129	124	 97
da21	 3815447MB	123	123	100
da22	 3815447MB	128	130	101
da23	 3815447MB	100	121	121 ++FAST++



initial parallel read...

Code:
Awaiting completion: initial parallel array read
Sat Oct 22 21:59:47 EDT 2016
Completed: initial parallel array read

Disk's average time is 40370 seconds per disk

Disk	Bytes Transferred Seconds %ofAvg
------- ----------------- ------- ------
da0		 4000787030016   40482	100
da1		 4000787030016   41139	102
da2		 4000787030016   38910	 96
da3		 4000787030016   40623	101
da4		 4000787030016   40159	 99
da5		 4000787030016   41656	103
da6		 4000787030016   41256	102
da7		 4000787030016   40390	100
da8		 4000787030016   40299	100
da9		 4000787030016   39488	 98
da10		4000787030016   40484	100
da11		4000787030016   40090	 99
da12		4000787030016   40582	101
da13		4000787030016   40242	100
da14		4000787030016   41080	102
da15		4000787030016   41234	102
da16		4000787030016   38779	 96
da17		4000787030016   40054	 99
da18		4000787030016   40452	100
da19		4000787030016   38872	 96
da20		4000787030016   40813	101
da21		4000787030016   40842	101
da22		4000787030016   38845	 96
da23		4000787030016   42110	104


Parallel seek stress shows lowe MB/s
Code:
Performing initial parallel seek-stress array read
Sat Oct 22 21:59:47 EDT 2016
The disk da0 appears to be 3815447 MB.
Disk is reading at about 17 MB/sec
This suggests that this pass may take around 3792 minutes

				   Serial Parall % of
Disk	Disk Size  MB/sec MB/sec Serial
------- ---------- ------ ------ ------
da0	  3815447MB	124	 16	 13
da1	  3815447MB	125	 16	 13
da2	  3815447MB	125	 18	 14
da3	  3815447MB	124	 17	 13
da4	  3815447MB	125	 15	 12
da5	  3815447MB	117	 16	 13
da6	  3815447MB	124	 17	 14
da7	  3815447MB	124	 15	 12
da8	  3815447MB	124	 15	 12
da9	  3815447MB	127	 15	 12
da10	 3815447MB	125	 19	 15
da11	 3815447MB	122	 16	 13
da12	 3815447MB	122	 16	 13
da13	 3815447MB	126	 13	 11
da14	 3815447MB	126	 17	 14
da15	 3815447MB	121	 15	 13
da16	 3815447MB	129	 17	 13
da17	 3815447MB	126	 14	 11
da18	 3815447MB	122	 16	 13
da19	 3815447MB	118	 17	 14
da20	 3815447MB	129	 17	 13
da21	 3815447MB	123	 16	 13
da22	 3815447MB	128	 16	 13
da23	 3815447MB	100	 16	 16



I've added an image of da0 here which shows the low parallel stress test read.

View attachment 14316

Camcontrol identity da0

Code:
pass0: <ST4000LM016-1N2170 0003> ACS-2 ATA SATA 3.x device
pass0: 600.000MB/s transfers, Command Queueing Enabled

protocol			  ATA/ATAPI-9 SATA 3.x
device model		  ST4000LM016-1N2170
firmware revision	 0003
serial number		 W8011VJD
WWN				   5000c5009b418896
cylinders			 16383
heads				 16
sectors/track		 63
sector size		   logical 512, physical 4096, offset 0
LBA supported		 268435455 sectors
LBA48 supported	   7814037168 sectors
PIO supported		 PIO4
DMA supported		 WDMA2 UDMA6
media RPM			 5400

Feature					  Support  Enabled   Value		   Vendor
read ahead					 yes	yes
write cache					yes	yes
flush cache					yes	yes
overlap						no
Tagged Command Queuing (TCQ)   no	no
Native Command Queuing (NCQ)   yes		32 tags
NCQ Queue Management		   no
NCQ Streaming				  no
Receive & Send FPDMA Queued	no
SMART						  yes	yes
microcode download			 yes	yes
security					   yes	no
power management			   yes	yes
advanced power management	  yes	no	0/0x00
automatic acoustic management  no	no
media status notification	  no	no
power-up in Standby			yes	no
write-read-verify			  yes	yes	2/0x2
unload						 no	no
general purpose logging		yes	yes
free-fall					  no	no
Data Set Management (DSM/TRIM) no
Host Protected Area (HPA)	  yes	  no	  7814037168/7814037168
HPA - Security				 no


CPU load is low, RAM use is low....

View attachment 14317


With regular black magic speed tests, Im seeing a read write from this array over 10gig networking of 250MB/s read and write. My 10g networking iperf 's at 9.xgbps so thats not the limitation here.




any pointers appreciated.....thanks in adv.
 

Dice

Wizard
Joined
Dec 11, 2015
Messages
1,335

wtfR6a

Explorer
Joined
Jan 9, 2016
Messages
88
final array performance writing some .ISO's....suspect Ill be swapping these out for more performant 3.5" disks soon.
3x8rz2.png
 

RegularJoe

Patron
Joined
Aug 19, 2013
Messages
326
Do you have Hyperthreading turned on? What about the C states? Turbo mode? Power Saving states balanced or low power? Knock that down to 64GB of RAM and test again. Before you made your ZFS Pool you should have made a Mirror-Stripe or Stripe them all and test performance. Is compression turned on for the Pool, if so make a data set with no compression. Do you have a PCI 2.0 card to test a stripe with? is teh slot PCIe 2.0 or 3.0? Is your motherboard certified with that PCIe 3.0 card?
 

wtfR6a

Explorer
Joined
Jan 9, 2016
Messages
88
sorry, been busy moving hence the delay.
Hyper threading and c-states are off.
Tested with 32GB > 256GB made no differences.
I tested with striped and mirror striped arrays,
Also tested 9211, 9207 & 9305 and motherboard controllers.
I spent about 2 months all in all testing performance of these drives under FreeNAS, Linux and Solaris.
Theres more info on STH but Solaris didn't have the same perf issues so I just called it a day and run them under Omni-OS.
 
Status
Not open for further replies.
Top