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Home -> Community -> Mailing Lists -> Oracle-L -> RE: HP EVA5000
Thanks for the reply. I think if the marketing fluff has a sufficient
correlation with reality, then these things should prove very, very
popular. However as I read docs for this device a certain nagging
uncomfortable feeling haunts me. This thing appears to dynamically
balance I/O across a "disk group" that may be arbitrarily large or small
within the confines of the physical frame. The minimum lun that it will
present is 1GB according to what I read.
Now consider two example configurations at the extremes. If I have a 2 disk group and a 128 disk group. I create a 1GB lun on each disk group. In the first group the stripe size would be 512M and in the second the stripe size would be 8k. Similarly if you create many different sized luns in a disk group you would get widely varying stripe sizes.
When we allocated many segment sizes in Oracle tablespaces in the long past times, we soon wound up dealing with fragmentation. I wonder if this array would be subject to the same issues. It is in my heart to hope they chose a uniform chunk size per disk group and managed them like we do uniformly allocated tablespaces.
Another worry is that as long as this array works precisely as advertised everything is cool. But if it makes a mistake in allocation or layout, I don't see a way to fix it. Now maybe it never errs, but boundary conditions can always create evil wierdness. How do I solve that problem?
Allan
-----Original Message-----
From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Loughmiller, Greg
Sent: Thursday, May 13, 2004 1:56 PM
To: 'oracle-l_at_freelists.org'
Subject: RE: HP EVA5000
Been using them in a lab environment for some Data movement efforts..
The
EVA's seem to have some "cheap and deep" storage compared to EMC/HDS..
In
addition, it "could" provide you options for data replication at the
storage
level for data protection...
Thanks
Greg
-----Original Message-----
From: Nelson, Allan [mailto:anelson_at_miswaco.com]=20
Sent: Thursday, May 13, 2004 1:09 PM
To: oracle-l_at_freelists.org
Subject: HP EVA5000
We are sizing a new database server and HP has proposed this array (actually two of them) for the disk subsystem. We are currently at 8.1.7.4 and are running Financials 11.5.7. Does anynone on the list have good or bad feedback to share about these devices.
TIA
> Allan L. Nelson
> Oracle DBA
> M-I L.L.C.=3D20
> (832) 295-2238 office=3D20
> (832) 351-4180 fax=3D20
> anelson_at_midf.com <mailto:anelson_at_midf.com>
>=3D20
>=3D20
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