tag:blogger.com,1999:blog-4096575.post5644705418379053540..comments2024-03-19T03:20:26.726-04:00Comments on The Arup Nanda Blog: Who Manages the Exadata Machine?Arup Nandahttp://www.blogger.com/profile/03392706779349258765noreply@blogger.comBlogger15125tag:blogger.com,1999:blog-4096575.post-13279559603675136562019-10-24T07:14:09.076-04:002019-10-24T07:14:09.076-04:00My head spin reading this very technical jargons h...My head spin reading this very technical jargons he he<br /><br /><a href="http://emhsys.com/blog/details/blog/gantry-crane/4e1abdff-62c6-4270-802f-3896cf1a31db" rel="nofollow">Gantry Crane</a><br />Giovanni Carlohttps://www.blogger.com/profile/12541728811738238430noreply@blogger.comtag:blogger.com,1999:blog-4096575.post-51057977908144272082013-01-03T11:31:59.192-05:002013-01-03T11:31:59.192-05:00After all my Exadata travels as a consultant, I...After all my Exadata travels as a consultant, I'm in a 110% agreement with what Arup said.<br /><br />I've never quite understood the need for masking the root password as a security measure from the DBAs even in the traditional world; after all, DBAs can see/play the real data (Way more dangerous) than the OS root passwords; Yet they are kept away from even the "OS" oracle password (The SUDO-oracle access is necessary for audit purposes, but once in a while we need the actual Oracle password as well e.g. Cluster Managed Database Services setup in OEM)? All in the name of not-enough-OS knowledge??? Doesn't make any sense, because most good DBAs have a pretty good handle on OS-level command-line mastery.<br /><br />Also, now with the pervasive use of sophisticated tools like OEM12cR2, sometimes, we as DBAs/DMAs sometimes have to wait for days for "an" SA to become available and plug-in the root/nm2/ilom etc. passwords for run running ExaChks, OEM monitoring agents etc.<br /><br />Another thing i've noted is that, there is a severe lack of <br />"Exadata System Admins" out there. Most of the SAs/Storage Admins inherit Exadata as part of their regular job duties really but, don't much what to do with it (Very few organizations train their SAs on Exadata).<br /><br />Summary: Kudos to you Arup for writing this post; this should be made Best Practice by Oracle.<br /><br />TariqTariq Farooq - Oracle ACE Directorhttps://www.blogger.com/profile/04707111905675364144noreply@blogger.comtag:blogger.com,1999:blog-4096575.post-40187784699438584542012-09-06T21:50:27.330-04:002012-09-06T21:50:27.330-04:00@Anonymous on Sep 6th:
If separation is a must, D...@Anonymous on Sep 6th:<br /><br />If separation is a must, DBAs do not need the root access.Arup Nandahttps://www.blogger.com/profile/03392706779349258765noreply@blogger.comtag:blogger.com,1999:blog-4096575.post-90750427985032574682012-09-06T15:31:37.489-04:002012-09-06T15:31:37.489-04:00Arup,
Excellent blog! If the organization requires...Arup,<br />Excellent blog! If the organization requires seperation of duties between two groups, what would be your recommendation? For example DBA's and Network/Storage Admins and would both need to have root access?<br /><br />ThanksAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-4096575.post-772834941133709612012-08-01T06:51:07.360-04:002012-08-01T06:51:07.360-04:00We just procured Exadata quarter RAC and facing th...We just procured Exadata quarter RAC and facing the question what support model should we have - traditional or new DBMA/DMA approach.<br /><br />After reading your blog, I am more inclined to propose DMA/DBMA approach. Thanks.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4096575.post-88964038428305038992012-06-27T12:32:59.807-04:002012-06-27T12:32:59.807-04:00Hi Arup,
I always read your blog posts and learn ...Hi Arup,<br /><br />I always read your blog posts and learn from it.<br />Thanks<br /><br />-Cheers,<br />Saya<br />http://satya-exadata.blogspot.com/2011/07/cellclicommandsexadata.htmlSatya Thirumanihttps://www.blogger.com/profile/14440084623088726822noreply@blogger.comtag:blogger.com,1999:blog-4096575.post-59349121633073394952012-06-06T03:25:42.203-04:002012-06-06T03:25:42.203-04:00I looked some post ,but I am not really appreciate...I looked some post ,but I am not really appreciated from there,then I saw your post information and I saw this is actually what I want. Keep up the great job.<br /><a href="http://www.diskdoctors.com/ssd-recovery.asp" rel="nofollow">ssd recovery</a>Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4096575.post-15404263413427647712012-02-27T02:47:21.632-05:002012-02-27T02:47:21.632-05:00Hello, I love reading through your blog, I wanted ...Hello, I love reading through your blog, I wanted to leave a little comment to support you and wish you a good continuation. Wish you best of luck for all your best efforts. <a href="http://amcofab.in/kiosk.htm" rel="nofollow">Kiosk Manufacturers</a>, <a href="http://amcofab.in/kiosk.htm" rel="nofollow">Kiosk Manufacturers in India</a>.Maneesh Kalrahttps://www.blogger.com/profile/09810315992385608010noreply@blogger.comtag:blogger.com,1999:blog-4096575.post-48741213413927003682012-02-02T19:26:04.509-05:002012-02-02T19:26:04.509-05:00Perhaps DBMA would be a better word rather than DM...Perhaps DBMA would be a better word rather than DMA.Porus Homi Havewala (પોરસ હોમી હવેવાલા)https://www.blogger.com/profile/04385272546735678398noreply@blogger.comtag:blogger.com,1999:blog-4096575.post-76751800578524626852012-01-09T01:55:33.805-05:002012-01-09T01:55:33.805-05:00Hello, I love reading through your blog, I wanted ...Hello, I love reading through your blog, I wanted to leave a little comment to support you and wish you a good continuation. Wish you best of luck for all your best efforts. <a href="http://amcofab.in/kiosk.htm" rel="nofollow">Kiosk Manufacturers</a>, <a href="http://amcofab.in/server-rack.htm" rel="nofollow">Server Racks</a>.Maneesh Kalrahttps://www.blogger.com/profile/09810315992385608010noreply@blogger.comtag:blogger.com,1999:blog-4096575.post-10392187105202826092011-08-01T02:14:58.553-04:002011-08-01T02:14:58.553-04:00Hi there. Nice blog. You have shared useful inform...Hi there. Nice blog. You have shared useful information. Keep up the good work! This blog is really interesting and gives good details. <a href="http://amcofab.in/server-rack.htm" rel="nofollow">Network Rack</a>, <a href="http://amcofab.in/" rel="nofollow">Racks Manufacturer in India</a>.Maneesh Kalrahttps://www.blogger.com/profile/09810315992385608010noreply@blogger.comtag:blogger.com,1999:blog-4096575.post-52803447727549321632011-07-25T07:57:03.532-04:002011-07-25T07:57:03.532-04:00Allan - thanks for comments. There is a big differ...Allan - thanks for comments. There is a big difference between knowing and managing. A good DBA should know about SAN concepts, layout, etc.; but manage them? I don't think so. For instance I do care about how the LUNs are spread out over spindles in my EMC SAN; but I don't know the exact symcli commandsto make that happen. It's a general purpose activity; not specific to any database. However in Exadata, it is not. There it's part of the machine. So, there it makes a whole lof of sense to learn.<br /><br />About regulatory compliance - that depends upon specific situation. I haven't seen a case where that has become an issue. The separation of duties has been mostly there for convenience reasons; not regulatory. But YMMV.Arup Nandahttps://www.blogger.com/profile/03392706779349258765noreply@blogger.comtag:blogger.com,1999:blog-4096575.post-8882420345269695702011-07-25T07:50:10.961-04:002011-07-25T07:50:10.961-04:00Uwe - thank you for your comments. I was not aware...Uwe - thank you for your comments. I was not aware of the arguments by Joel and Harald. But I do differ in that argument. In a typical database installation, I support a separation of duties. Why? There is just too much for a DBA to understand every little nuance about the specific model of storage and network gear. For instance the current evolution of EMC is VMAX which has subtle differences from it's predecessor - the DMX. Since storage is used not just for database but for everything in an organization, it's not fair to ask the DBA to manage that. Exadata is different. The storage is for database only and is integrated into the machine; so there it makes sense for the New role to manage it. It has to be a new role; hence I called it DMA.Arup Nandahttps://www.blogger.com/profile/03392706779349258765noreply@blogger.comtag:blogger.com,1999:blog-4096575.post-70474180097371868222011-07-25T05:26:26.633-04:002011-07-25T05:26:26.633-04:00Oracle have sold the Exadata to DBAs as something ...Oracle have sold the Exadata to DBAs as something they own and control and a DMA role will be very attractive to DBAs.<br /><br />A good DBA should, at least, understand the OS/Storage and Network layers which underpin their database. Would they always have time or ability to learn and manage these things?<br /><br />For many corporates, the DMA role would undermine regulatory and security frameworks, eg SOX compliance and separation of roles and responsibilities.<br /><br />So the Exadata DMA role sounds great and the skillset is something that an individual should strive towards, but it is unlikely to come about in larger IT organizations unless there is a change in IT management thinking.Allanhttps://www.blogger.com/profile/11161557224107829636noreply@blogger.comtag:blogger.com,1999:blog-4096575.post-64520340165934252072011-07-25T03:22:09.209-04:002011-07-25T03:22:09.209-04:00Great post about an important topic, Arup!
What y...Great post about an important topic, Arup! <br />What you describe seems to be indeed a concern for many shops that implement Exadata: Who is in charge for all the different layers?<br /> <br />It seems (from my experience) that most customers take the "DBAs-manage-it-all-approach", like you suggest in your article. <br /><br />The idea that DBAs develop skills in the storage & network area has 2 well known evangelists, by the way: Harald van Breederode & Joel Goodman have published this paper about what they call "DBA 2.0": http://dbatrain.files.wordpress.com/2009/01/dba20.pdf<br />Seems to be analogous to your "DMA" - it is just not limited to administering Exadata :-)Anonymousnoreply@blogger.com