tag:blogger.com,1999:blog-549043503714582179.post6969779140667677230..comments2024-03-13T16:27:52.280+11:00Comments on ASM Support Guy: ASM in ExadataBane Radulovichttp://www.blogger.com/profile/07892013690973803072noreply@blogger.comBlogger14125tag:blogger.com,1999:blog-549043503714582179.post-50670864306305249402013-06-08T00:07:53.229+10:002013-06-08T00:07:53.229+10:00Very nice blog, I will keep on visiting this. Very nice blog, I will keep on visiting this. adminhttps://www.blogger.com/profile/12255782816832945392noreply@blogger.comtag:blogger.com,1999:blog-549043503714582179.post-22397605182707877742013-06-03T16:35:44.412+10:002013-06-03T16:35:44.412+10:00Hi Bane',
Again' I am very much thankful ...Hi Bane',<br /><br />Again' I am very much thankful to you for your reply on above.. As per your comment I will check the same notes and will ask further question on its.. Now I have very positive feeling to learn exadata because now I have someone where I can share my drought and clear it.<br /><br />Thanks again.<br /><br />Regards'<br />Raj guptaraj guptahttps://www.blogger.com/profile/03041649005741465633noreply@blogger.comtag:blogger.com,1999:blog-549043503714582179.post-83825716638109156062013-06-01T11:36:56.518+10:002013-06-01T11:36:56.518+10:00Thanks for you kind words Raj. You made a good poi...Thanks for you kind words Raj. You made a good point. I see that I haven't really talked about setting up ASM in Exadata. This is done at the deployment time by Oracle and if you are not there at the time, you miss the whole thing. I will write a post on that...<br /><br />To answer your questions - in Exadata we create grid disks on storage cells and then ASM uses those grid disks to create disk groups. This is done at the deployment time and rarely changes, so DBAs and storage admins don't get to learn about it. A common reason for a change is a need to resize a disk group. You would then need to drop the grid disks, recreate them, etc. All this is done on the storage cells, using the cellcli command.<br /><br />I recommend you review the following documents:<br />1. Oracle® Exadata Storage Server Software User's Guide [http://docs.oracle.com/html/E13861_14/toc.htm]<br />2. Resize diskgroup without downtime in Exadata (Doc ID 1272569.1) [no link as you need to access it via My Oracle Support (MOS)]<br />3. How to resize ASM disk/Grid disk in Exadata Environment (Doc ID 1245494.1) [same with this one - access via MOS only]<br /><br />Let me know if you have more questions or if you run into any issues.<br /><br />Cheers,<br />BaneBane Radulovichttps://www.blogger.com/profile/07892013690973803072noreply@blogger.comtag:blogger.com,1999:blog-549043503714582179.post-34284757042819066732013-06-01T02:04:26.658+10:002013-06-01T02:04:26.658+10:00And also really Thank you so much for this wonderf...And also really Thank you so much for this wonderful blogsraj guptahttps://www.blogger.com/profile/03041649005741465633noreply@blogger.comtag:blogger.com,1999:blog-549043503714582179.post-31363803965094571362013-06-01T01:58:45.077+10:002013-06-01T01:58:45.077+10:00Hi Bane,
I am very new exadata.. As i know ACFS i...Hi Bane,<br /> I am very new exadata.. As i know ACFS is not supporting exadata. For the same reason we have DBFS file system which is running over ASM..I am trying to get information regarding how we configure disk (Any LVM LUN and all)for ASM. As we know in exadata we have cell server for storage and the same every cell we have 12 hard disk and 14 flash.. How we are managing and configuring the same with ASM.<br /><br />May i ask some silly question but really believe me i am trying me best to clear my drought on same.<br /><br />And also request you to pls provide your some notes for the same topics.<br /><br />Regards'<br />Raj GuptaAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-549043503714582179.post-53848281346328471822013-03-07T20:16:09.075+11:002013-03-07T20:16:09.075+11:00OK, so you meant a single cell disk failure, not t...OK, so you meant a single cell disk failure, not the cell failure.<br /><br />That simply means the disk has failed and it needs to be replaced.<br /><br />Cheers,<br />BaneBane Radulovichttps://www.blogger.com/profile/07892013690973803072noreply@blogger.comtag:blogger.com,1999:blog-549043503714582179.post-7807893617969418392013-03-07T20:12:33.773+11:002013-03-07T20:12:33.773+11:00physical disk failure.. why this happens... showin...physical disk failure.. why this happens... showing the status as critical.. reasons<br />Anonymoushttps://www.blogger.com/profile/08720348452979971376noreply@blogger.comtag:blogger.com,1999:blog-549043503714582179.post-53379475904839910272013-03-07T20:08:57.166+11:002013-03-07T20:08:57.166+11:00a physical disk failed showing status as critical....a physical disk failed showing status as critical... what are the conditions...Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-549043503714582179.post-5472373395194343542013-03-07T18:41:51.018+11:002013-03-07T18:41:51.018+11:00A storage cell is an x86 server, running Linux and...A storage cell is an x86 server, running Linux and Exadata software stack. A motherboard can fail, a CPU can fail, Linux can crash, Exadata software can become unresponsive, etc. All these would be critical failures.<br />It would be good if you could clarify on what exactly are you after or what are you worried about.<br />Cheers,<br />BaneBane Radulovichttps://www.blogger.com/profile/07892013690973803072noreply@blogger.comtag:blogger.com,1999:blog-549043503714582179.post-4182949804448594802013-03-07T18:24:34.923+11:002013-03-07T18:24:34.923+11:00Hi Bane,
can u please provide me with the conditi...Hi Bane,<br /><br />can u please provide me with the conditions under which an exadata cell fails..Anonymoushttps://www.blogger.com/profile/08720348452979971376noreply@blogger.comtag:blogger.com,1999:blog-549043503714582179.post-63501336063439272302013-01-13T11:29:28.308+11:002013-01-13T11:29:28.308+11:00Hi Uday,
Exadata monitors disk/flash performance ...Hi Uday,<br /><br />Exadata monitors disk/flash performance at all times and if a disk/flash is under-performing it will take it out of the system. That would be proactive failure as the disk/flash is taken out before it has actually failed.<br /><br />Exadata also monitors for the number of media and other disk/flash failures (e.g. an I/O write failure due to physical media damage). If there are too many of those, Exadata is 'predicting' that it will soon fail and it takes it out of the system.<br /><br />I believe the poor performance case is the same as the proactive failure - the disk/flash would be removed from the system if it is under-performing. For a bit more on this topic have a look at MOS Doc ID 1484274.1 that I have published recently.<br /><br />Cheers,<br />Bane<br />Bane Radulovichttps://www.blogger.com/profile/07892013690973803072noreply@blogger.comtag:blogger.com,1999:blog-549043503714582179.post-61722653371301974662013-01-13T00:21:21.779+11:002013-01-13T00:21:21.779+11:00Hi Bane,
Could you please elaborate the differen...Hi Bane,<br /><br />Could you please elaborate the difference between terms "proactive failure","predictive failure","poor performance","failure" with respect to both flash disk and grid disk.<br /><br />For the image version :11.2.3.2.0<br />Thanks,<br />Udayㅤㅤjampanihttps://www.blogger.com/profile/16387902408697448898noreply@blogger.comtag:blogger.com,1999:blog-549043503714582179.post-49325754207760258232012-12-09T23:39:22.427+11:002012-12-09T23:39:22.427+11:00Thanks Jagjeet,
I think the official reason is tha...Thanks Jagjeet,<br />I think the official reason is that Exadata disks are not Exposed directly to database nodes (kernel). But I guess the real reasons are to do with technical challenges around implementing ACFS in Exadata environment and ensuring good ACFS performance...<br />Cheers,<br />BaneBane Radulovichttps://www.blogger.com/profile/07892013690973803072noreply@blogger.comtag:blogger.com,1999:blog-549043503714582179.post-28681453198128110012012-12-09T19:53:27.046+11:002012-12-09T19:53:27.046+11:00Hi Bane- Thanks for excellent post, may I ask why ...Hi Bane- Thanks for excellent post, may I ask why does ACFS not supported with Exadata ?<br /><br />ThanksJagjeet Singh --https://www.blogger.com/profile/15574893268707833029noreply@blogger.com