topic EVA5000 performance in Disk Enclosures

EVA5000 performance

Denis from Russia — Thu, 15 Mar 2007 06:55:09 GMT

I'm using Evaperf.
I got following result:

Array Status (evaper -as):
Total Host
2500 Req/s

Total Node Host MB/s
60.00 MB/s

EVA virtual disk with related counters (evaperf -vd):

Read Hit
904 Req/s

Read Hit
21.66 MB/s

Read Hit Latency
0.2 ms

Read Miss
1247 Req/s

Read Miss
21.42 MB/s

Read Miss Latency
4.5 ms

I got following result in hp-ux:
c13t0d0 - EVA5000 LUN

# iostat 5 5

device bps sps msps

c0t6d0 0 0.0 1.0
c2t6d0 0 0.0 1.0
c13t0d0 0 0.0 1.0

c0t6d0 77 13.9 1.0
c2t6d0 6 1.8 1.0
c13t0d0 25038 1598.2 1.0

c0t6d0 230 9.2 1.0
c2t6d0 1 0.4 1.0
c13t0d0 35737 1805.4 1.0

c0t6d0 130 7.4 1.0
c2t6d0 2 0.6 1.0
c13t0d0 22853 1522.8 1.0

c0t6d0 74 6.0 1.0
c2t6d0 9 2.6 1.0
c13t0d0 16602 1407.8 1.0

Have I performance problem with EVA5000?

Re: EVA5000 performance

Tim Nelson — Thu, 15 Mar 2007 11:50:39 GMT

How about some more into.

the c13t0d0 looks busy but busy is not neccessarily bad. If the requests are serviced then all is swell.

how about a sar -d 5 5

look at the avserv time. If low ( 1ms - 10ms ) then the requests are being serviced.

over 10ms on modern SANs are potentially suspect but if not consistant then no worries.

Re: EVA5000 performance

Ivan Ferreira — Thu, 15 Mar 2007 11:59:25 GMT

I think that the data provided is not enough. But the total requests/MB per second are low.

Why do you think that you could have a storage performace problem?

Check the IOWAIT (wa) operating system performance metric to identify if you possibly have a I/O related problem.

Poor coded or tuned applications can underutilize the storage.

Re: EVA5000 performance

Denis from Russia — Fri, 16 Mar 2007 04:35:08 GMT

Hello all!

# sar -d 5 5

HP-UX B.11.11 U 9000/800

device %busy r+w/s blks/s avwait avserv
c0t6d0 3.59 7 81 6.24 5.08
c2t6d0 1.99 3 17 6.45 5.14
c13t0d0 99.60 1295 41550 5.44 3.42

c0t6d0 6.41 29 658 5.10 2.89
c2t6d0 0.80 2 11 5.73 5.22
c13t0d0 97.80 1509 61814 5.46 2.76

c0t6d0 1.80 5 68 3.91 5.91
c2t6d0 1.40 3 41 3.46 6.75
c13t0d0 98.20 1216 46662 5.29 2.87

c0t6d0 2.00 6 48 4.94 6.46
c2t6d0 1.60 5 35 5.80 7.07
c13t0d0 99.20 1016 33617 5.12 2.95

c0t6d0 3.80 9 334 5.42 4.96
c2t6d0 1.20 2 6 6.74 4.66
c13t0d0 98.20 1079 34188 5.23 2.98

Av. 3.52 11 238 5.18 4.12
Av. 1.40 3 22 5.57 6.09
Av. 98.60 1223 43557 5.32 2.99

Re: EVA5000 performance

pswma2 — Mon, 19 Mar 2007 06:56:20 GMT

Hi,
can you tell your EVA config please: number and type of disks, C212D or C26D, VCS version.

Re: EVA5000 performance

Denis from Russia — Tue, 20 Mar 2007 02:04:11 GMT

Hello!

I have 28 disks (72Gb,15k rpm) with 1 disk group.