Marcy, we're in prod with it. A clustered Prod guest (horizontal cluster) a
clustered test guest (vertical cluster) and one sandbox where the
developers go to break their code. It is a pig when it starts up. Also, if
you're going to do DB2 Data access with WAS on z/Linux, you really need to
access DB2 on z/OS (whether by DB2 connect or Shadow Direct) there is an
order of magnitude improvement of performance if you do the DB2 access via
hipersockets.
Bennie Hicks
<[EMAIL PROTECTED]
ail.net> To
Sent by: Linux on [email protected]
390 Port cc
<[EMAIL PROTECTED]
IST.EDU> Subject
Re: WebsphereAS on zSeries
performance?
04/06/2005 04:28
PM
Please respond to
Linux on 390 Port
<[EMAIL PROTECTED]
IST.EDU>
Currently running 3 test guest WAS machines, started out at 512M, but
one was increased to 768M due to some "linux" paging. Again, no tuning
has been done as of yet. Have more memory, but the CPU cycles alarmed me!
Cortes, Marcy D. wrote:
>Our test/dev box is a single z900 IFL with 4.5GB (3.5 central 1 xstor).
>There are 49 servers running today there. 7 of these are WebSphere.
(Note:
>prod is not on this - it's off on 2 z990s).
>
>We were doing pretty well on that with few complaints from the WebSphere
>testers/developers, also averaging in the low 20's for cpu until CVS came
>along... Now we average 90% (we will be moving that somewhere else -
perhaps
>on of the z990s with crypto).
>
>But there does seem to be a big difference in the 900 vs the 990 -
websphere
>starts up and shuts down way faster for one.
>
>How big are your WAS test server virtual machines?
>
>
>Marcy Cortes
>WFS Enterprise Hosting Services - VM & Linux
>
>
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>
>-----Original Message-----
>From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of
Bennie
>Hicks
>Sent: Wednesday, April 06, 2005 10:44
>To: [email protected]
>Subject: Re: [LINUX-390] WebsphereAS on zSeries performance?
>
>I did fail to mention that we run a z900, single IFL with 4GB (3 central
>1 xstore, while awaiting anoter 4G for central) on two CEC's for a
>redundant web hosting environment. I have about 15 guests (mostly
>apache test & prod servers with an NFS server to share the data to the
>other CEC IFL). I had been averaging about 22-26% CPU until two test
>WAS servers were built, and they got the rest (at times)! Complaining
>about start up time and java compile times. Basically running all
>limitsoft with relative shares at this point to keep prod (also
>quickdsp'ed) running along. Was just wondering what others may have
>noticed in the WAS environment, as my initial observation is that at
>least on the z900 that a single IFL will not make testing clients happy
>it seems. Yeah, we have not attempted to tune it yet and there are a
>couple good papers out there by IBM'ers, but think the CPU aspect is
>inevitably bad .........I guess we'll see, huh?!
>
>Mike Riggs wrote:
>
>
>
>>We currently support 6 LINUX guests (soon to be 8) with 3 of them running
>>WAS, 3 running UDB. We do this with a z/890 and only 1 IFL and 3gig of
>>memory.
>>More memory is due in and we're still arguing the need for an additional
>>IFL.
>>
>>
>>
>>Mike Riggs
>>Supreme Court of Virginia
>>(804) 786-7823
>>
>>
>>
>> Rich Smrcina
>> <[EMAIL PROTECTED]
>> om> To
>> Sent by: Linux on [email protected]
>> 390 Port cc
>> <[EMAIL PROTECTED]
>> IST.EDU> Subject
>> Re: WebsphereAS on zSeries
>> performance?
>> 04/05/2005 03:16
>> PM
>>
>>
>> Please respond to
>> Linux on 390 Port
>> <[EMAIL PROTECTED]
>> IST.EDU>
>>
>>
>>
>>
>>
>>
>>Going to a z890 IFL (from a MP3K IFL) was a major improvement. Startup
>>time went from 15-20 minutes to 2 minutes. A single IFL of sufficient
>>power is enough here, but that always depends upon your specific
>>workload. The apps are fairly well tuned also (which helps anywhere).
>>
>>Bennie Hicks wrote:
>>
>>
>>
>>
>>>Anybody out there running WAS on a single IFL? Interested in your
>>>thoughts/comments on performance, impacts of java compiles, etc. and
>>>whether or not a single IFL engine is enough..............thanks!
>>>
>>>--
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>>>
>>>
>>>
>>--
>>Rich Smrcina
>>VM Assist, Inc.
>>Main: (262)392-2026
>>Cell: (414)491-6001
>>Ans Service: (866)569-7378
>>rich.smrcina at vmassist.com
>>
>>Catch the WAVV! http://www.wavv.org
>>WAVV 2005 - Colorado Springs - May 20-24, 2005
>>
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>>
>>
>>
>
>--
>Bennie Hicks - 919-981-5107
> Network Systems Programmer
> State of North Carolina
> Office of Information Technology Services
>
>--
>E-mail correspondence to and from this address may be subject to the North
>Carolina Public Records Law and may be disclosed to third parties by an
>authorized state official.
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--
Bennie Hicks - 919-981-5107
Network Systems Programmer
State of North Carolina
Office of Information Technology Services
--
E-mail correspondence to and from this address may be subject to the North
Carolina Public Records Law and may be disclosed to third parties by an
authorized state official.
--
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