EVA 4400 write performance

[Pilutak]

Hi
Hi
I'd like to know if 170~200 MB/s write poor good or fast on EVA 4400 with Vraid1 on 32x15k disks.
I tested the speed with

dd if=largefile of=/LUN1/largefile conv=sync bs=1M

thanks
Pilutak

[Prakash Singh_1 · Accepted solution]

HI,

Kindly chk the below link:

http://forums13.itrc.hp.com/service/forums/questionanswer.do?admit=109447627+1291886496649+28353475&threadId=1456026

Hope this helps...


Regards,


Prakash Singh

[Johan Guldmyr]

Good link there! Generally you don't want to use dd to test performance. A lot of people use iometer instead.

[Víctor Cespón]

Sequential read/write performance from a single server is not a good indicator. As you create vdisks and present them to servers, they start reading and writting hundreds of files per second. The limit is usually the number of I/Os per second (which is porportinal to the number of disks).

http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01671044

[Prokopets]

Hi!
Generally, EVA is OLTP storage, so it's not a good idea to measure its performance with dd which does only single write or read stream. As for 170-200 Mb/s - well... It's nod bad for this configuration, but i recommend you to upgrade your eva to the latest fw. I had a performance issue with this storage and it solved (well... partially :) ) with fw upgrade. Of course i cannot guarantee that it will work - in my case i upgraded very old (i think one of the first fw versions) fw.

Regards,
Philipp.

[Pilutak]

Thanks for all replies

The documents were very helpful.

Mean while, i have been doing some testing on IO with bonnie++. but since the server is for OLTP, i am going to test it with Oracle ORION and/or sysbench for mysql.

BR
Pilutak

[Pilutak]

Thanks for all replies.