{"id":487,"date":"2019-06-04T19:05:35","date_gmt":"2019-06-04T22:05:35","guid":{"rendered":"http:\/\/www.fernandosimon.com\/blog\/?p=487"},"modified":"2020-07-19T19:20:13","modified_gmt":"2020-07-19T22:20:13","slug":"oda-json-and-flash","status":"publish","type":"post","link":"https:\/\/www.fernandosimon.com\/blog\/oda-json-and-flash\/","title":{"rendered":"ODA, JSON and FLASH"},"content":{"rendered":"<p style=\"text-align: justify;\">Recently, in March, I made the reimage from an X5-2 HA ODA and saw a strange behavior during the diskgroup creation and couldn\u2019t reproduce (because involve reimaging again). Basically, the FLASH diskgroup was not created.<\/p>\n<p style=\"text-align: justify;\">But in last May I reimaged another ODA using the same patch\/imageversion (18.3.0.0 &#8211; Patch 27604623) and was possible to verify again. In both cases, I created the appliance using the CLI \u201c<em>odacli create-appliance<\/em>\u201d using JSON file because the network uses VLAN (what it is impossible to create using the web interface), and both appliances are identical (X5-2 HA with SSD for RECO and FLASH).<\/p>\n<p style=\"text-align: justify;\">To reimage, I followed the steps in the docs for this version and used the ISO to do the baremetal procedure. If you look in the docs about the options for storage (check <a href=\"https:\/\/docs.oracle.com\/en\/engineered-systems\/oracle-database-appliance\/18.3\/cmtxl\/create-appliance-using-json-file.html#GUID-42250FD2-EA91-4457-9ED7-CA3A2A863B40\" target=\"_blank\" rel=\"noopener noreferrer\">here<\/a>) you can see that there is no single reference to use FLASH diskgroup (or that you need to do that). Checking in the readme\/reference JSON files that exist in the folder \u201c\/opt\/oracle\/dcs\/sample\u201d under file \u201c<em>sample-oda-ha-json-readme.txt<\/em>\u201d:<\/p>\n<p style=\"text-align: justify;\"><!--more More...--><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"no-highlight\" data-enlighter-title=\"Readme for Grid Diskgroups Definition for JSON file\">grid:\r\n    diskGroup: (ODA HA contains DATA, RECO and REDO Diskgroups)\r\n        diskgroupName: DATA|RECO|REDO\r\n        redundancy: Normal|High\r\n        If the system has less than 5 NVMe storage devices, redundancy is Normal.\r\n        If the system has 5 or more NVMes, then Normal or High are supported.\r\n        diskPercentage: Percentage of NVMe drive capacity is used for this particular diskgroup.\r\n<\/pre>\n<p style=\"text-align: justify;\">And the example that comes with the image (sample-oda-ha.json):<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"no-highlight\" data-enlighter-title=\"Reference JSON file\">\"grid\" : {\r\n  \"diskGroup\" : [ {\r\n    \"diskGroupName\" : \"DATA\",\r\n    \"redundancy\" : \"\",\r\n    \"diskPercentage\" :80\r\n  }, {\r\n    \"diskGroupName\" : \"RECO\",\r\n    \"redundancy\" : \"\",\r\n    \"diskPercentage\" :20\r\n  }, {\r\n    \"diskGroupName\": \"REDO\",\r\n    \"diskPercentage\": 100,\r\n    \"redundancy\": \"HIGH\"\r\n  } ],<\/pre>\n<p style=\"text-align: justify;\">As you can see there is no reference to FLASH, or even if it is possible to use that (because the options are diskgroupName: DATA|RECO|REDO). Based on that (and supposing that FLASH will be created automatically \u2013 since X5-2 have these SSD disk dedicated to that) I made JSON file with:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"no-highlight\" data-enlighter-title=\"Used JSON file\">\"grid\" : {\r\n  \"diskGroup\" : [ {\r\n    \"diskGroupName\" : \"DATA\",\r\n    \"redundancy\" : \"NORMAL\",\r\n    \"disks\" : null,\r\n    \"diskPercentage\" : 90\r\n  }, {\r\n    \"diskGroupName\" : \"RECO\",\r\n    \"redundancy\" : \"NORMAL\",\r\n    \"disks\" : null,\r\n    \"diskPercentage\" : 10\r\n  }, {\r\n    \"diskGroupName\" : \"REDO\",\r\n    \"redundancy\" : \"HIGH\",\r\n    \"disks\" : null,\r\n    \"diskPercentage\" : null\r\n  } ],<\/pre>\n<p style=\"text-align: justify;\">And after the <em>create-appliance<\/em> command I got just these filegroups in ASM:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"no-highlight\" data-enlighter-title=\"ASM diskgroups\">ASMCMD&gt; lsdg\r\nState    Type    Rebal  Sector  Logical_Sector  Block       AU   Total_MB    Free_MB  Req_mir_free_MB  Usable_file_MB  Offline_disks  Voting_files  Name\r\nMOUNTED  NORMAL  N         512             512   4096  4194304  108019712  108000740          6751232        50624754              0             Y  DATA\/\r\nMOUNTED  NORMAL  N         512             512   4096  4194304   11997184   11995456           749824         5622816              0             N  RECO\/\r\nMOUNTED  HIGH    N         512             512   4096  4194304     762880     749908           190720          186396              0             N  REDO\/\r\nASMCMD&gt;<\/pre>\n<p style=\"text-align: justify;\">And the <em>describe-system<\/em> reports:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"no-highlight\" data-enlighter-title=\"odacli describe-system\">[root@ODA1 ~]# \/opt\/oracle\/dcs\/bin\/odacli describe-system\r\n\r\nAppliance Information\r\n----------------------------------------------------------------\r\n                     ID: XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX\r\n               Platform: X5-2-HA\r\n        Data Disk Count: 24\r\n         CPU Core Count: 6\r\n                Created: March 26, 2019 11:56:24 AM CET\r\n\r\nSystem Information\r\n----------------------------------------------------------------\r\n                   Name: ODA\r\n            Domain Name: XYZ.XYZ\r\n              Time Zone: Europe\/Luxembourg\r\n             DB Edition: EE\r\n            DNS Servers: 1.1.1.1 2.2.2.2\r\n            NTP Servers: 3.3.3.3\r\n\r\nDisk Group Information\r\n----------------------------------------------------------------\r\nDG Name                   Redundancy                Percentage\r\n------------------------- ------------------------- ------------\r\nData                      Normal                    90\r\nReco                      Normal                    10\r\nRedo                      High                      100\r\n\r\n[root@ODA1 ~]#<\/pre>\n<p style=\"text-align: justify;\">After that, the only option was creating the FLASH manually:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"no-highlight\" data-enlighter-title=\"Manually create FLASH diskgroup\">SQL&gt; create diskgroup FLASH normal redundancy\r\n  2     DISK 'AFD:SSD_E0_S16_1320409344P1' NAME SSD_E0_S16_1320409344P1\r\n  3     ,  'AFD:SSD_E0_S17_1320408816P1' NAME SSD_E0_S17_1320408816P1\r\n  4     ,  'AFD:SSD_E0_S18_1320404784P1' NAME SSD_E0_S18_1320404784P1\r\n  5     ,  'AFD:SSD_E0_S19_1320406740P1' NAME SSD_E0_S19_1320406740P1\r\n  6     attribute  'COMPATIBLE.ASM' =   '18.0.0.0.0'\r\n  7     , 'COMPATIBLE.rdbms' = '12.1.0.2'\r\n  8     , 'compatible.advm' = '18.0.0.0'\r\n  9     , 'au_size'='4M'\r\n  10  ;\r\n\r\nDiskgroup created.\r\n\r\nSQL&gt; select NAME, SECTOR_SIZE, ALLOCATION_UNIT_SIZE, COMPATIBILITY, DATABASE_COMPATIBILITY from v$asm_diskgroup;\r\n\r\nNAME                           SECTOR_SIZE ALLOCATION_UNIT_SIZE COMPATIBILITY                                                DATABASE_COMPATIBILITY\r\n------------------------------ ----------- -------------------- ------------------------------------------------------------ ------------------------------------------------------------\r\nDATA                                   512              4194304 18.0.0.0.0                                                   12.1.0.2.0\r\nRECO                                   512              4194304 18.0.0.0.0                                                   12.1.0.2.0\r\nREDO                                   512              4194304 18.0.0.0.0                                                   12.1.0.2.0\r\nFLASH                                  512              4194304 18.0.0.0.0                                                   12.1.0.2.0\r\n\r\nSQL&gt;<\/pre>\n<p style=\"text-align: justify;\">Reimage again, or cleanup everything, sometimes it is not an option. Change the JSON file and modify the parameter &#8220;dbOnFlashStorage&#8221; it is not correct since will fail again as you can see in the <a href=\"https:\/\/docs.oracle.com\/cd\/E89155_01\/doc.122\/e93442\/issues-odax7.htm#CMTRN-GUID-13CCDBA5-D88C-4036-8F7F-D98732A324F0\" target=\"_blank\" rel=\"noopener noreferrer\">release notes<\/a> for version 12.2.1.3.0 that says in workaround: \u201c<em>Provide information for DATA, REDO, RECO, and FLASH disk groups at the time of provisioning. If you have provisioned your environment without creating the FLASH disk group, then create the FLASH disk group manually. This issue is tracked with Oracle bug 27721310.<\/em>\u201d<\/p>\n<h2>Second try<\/h2>\n<p style=\"text-align: justify;\">For the second reimage I specified my JSON file as:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"no-highlight\" data-enlighter-title=\"Used JSON file for second reimage\">\"grid\" : {\r\n  \"diskGroup\" : [ {\r\n    \"diskGroupName\" : \"DATA\",\r\n    \"redundancy\" : \"NORMAL\",\r\n    \"disks\" : null,\r\n    \"diskPercentage\" : 90\r\n  }, {\r\n    \"diskGroupName\" : \"RECO\",\r\n    \"redundancy\" : \"NORMAL\",\r\n    \"disks\" : null,\r\n    \"diskPercentage\" : 10\r\n  }, {\r\n    \"diskGroupName\" : \"REDO\",\r\n    \"redundancy\" : \"HIGH\",\r\n    \"disks\" : null,\r\n    \"diskPercentage\" : null\r\n  }, {\r\n    \"diskGroupName\" : \"FLASH\",\r\n    \"redundancy\" : \"NORMAL\",\r\n    \"disks\" : null,\r\n    \"diskPercentage\" : null\r\n  } ],<\/pre>\n<p style=\"text-align: justify;\">And the description for system now says:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"no-highlight\" data-enlighter-title=\"odacli describe-system with FLASH\">[root@OAK1 ~]# \/opt\/oracle\/dcs\/bin\/odacli describe-system\r\n\r\nAppliance Information\r\n----------------------------------------------------------------\r\n                     ID: XXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX\r\n               Platform: X5-2-HA\r\n        Data Disk Count: 24\r\n         CPU Core Count: 36\r\n                Created: May 22, 2019 11:03:36 AM CEST\r\n\r\nSystem Information\r\n----------------------------------------------------------------\r\n                   Name: OAK\r\n            Domain Name: XYZ.XYZ\r\n              Time Zone: Europe\/Luxembourg\r\n             DB Edition: EE\r\n            DNS Servers: 1.1.1.1 2.2.2.2\r\n            NTP Servers: 3.3.3.3\r\n\r\nDisk Group Information\r\n----------------------------------------------------------------\r\nDG Name                   Redundancy                Percentage\r\n------------------------- ------------------------- ------------\r\nData                      Normal                    90\r\nReco                      Normal                    10\r\nRedo                      High                      100\r\nFlash                     Normal                    100\r\n\r\n[root@OAK1 ~]#<\/pre>\n<p style=\"text-align: justify;\">And I can confirm everything as expected in ASM:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"no-highlight\" data-enlighter-title=\"ASM diskgroup with FLASH\">ASMCMD&gt; lsdg\r\nState    Type    Rebal  Sector  Logical_Sector  Block       AU   Total_MB    Free_MB  Req_mir_free_MB  Usable_file_MB  Offline_disks  Voting_files  Name\r\nMOUNTED  NORMAL  N         512             512   4096  4194304  108019712  108007188          6751232        50627978              0             Y  DATA\/\r\nMOUNTED  NORMAL  N         512             512   4096  4194304    1525760    1518672           381440          568616              0             N  FLASH\/\r\nMOUNTED  NORMAL  N         512             512   4096  4194304   11997184   11995736           749824         5622956              0             N  RECO\/\r\nMOUNTED  HIGH    N         512             512   4096  4194304     762880     749908           190720          186396              0             N  REDO\/\r\nASMCMD&gt;<\/pre>\n<p style=\"text-align: justify;\">If you compare the job report for the new <em>create-appliance<\/em> execution:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"no-highlight\" data-enlighter-title=\"create-appliance job with FLASH\">Post cluster OAKD configuration          May 22, 2019 11:53:45 AM CEST       May 22, 2019 11:59:11 AM CEST       Success\r\nDisk group 'RECO'creation                May 22, 2019 11:59:20 AM CEST       May 22, 2019 11:59:38 AM CEST       Success\r\nDisk group 'REDO'creation                May 22, 2019 11:59:38 AM CEST       May 22, 2019 11:59:47 AM CEST       Success\r\nDisk group 'FLASH'creation               May 22, 2019 11:59:47 AM CEST       May 22, 2019 11:59:58 AM CEST       Success\r\nVolume 'commonstore'creation             May 22, 2019 11:59:58 AM CEST       May 22, 2019 12:00:48 PM CEST       Success<\/pre>\n<p>It is different from the previous:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"no-highlight\" data-enlighter-title=\"create-appliance without FLASH\">Post cluster OAKD configuration          March 26, 2019 1:47:06 PM CET       March 26, 2019 1:52:32 PM CET       Success\r\nDisk group 'RECO'creation                March 26, 2019 1:52:41 PM CET       March 26, 2019 1:52:57 PM CET       Success\r\nDisk group 'REDO'creation                March 26, 2019 1:52:57 PM CET       March 26, 2019 1:53:07 PM CET       Success\r\nVolume 'commonstore'creation             March 26, 2019 1:53:07 PM CET       March 26, 2019 1:53:53 PM CET       Success<\/pre>\n<h2>Know your environment and your target<\/h2>\n<p style=\"text-align: justify;\">So, be careful during your ODA deployment, even if the doc says something, check again to avoid errors. It is important to know your environment and be aware of what is expected as a result. Here in this case, even if the docs says nothing about specifying the FLASH diskgroup, it is needed and if you forgot, not FLASH for you.<\/p>\n<p>&nbsp;<\/p>\n<p><strong><em>Disclaimer<\/em><\/strong><em>: &#8220;The postings on this site are my own and don&#8217;t necessarily represent my actual employer positions, strategies or opinions. The information here was edited to be useful for general purpose, specific data and identifications were removed to allow reach the generic audience and to be useful for the community. Post protected by copyright.\u201d<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Recently, in March, I made the reimage from an X5-2 HA ODA and saw a strange behavior during the diskgroup creation and couldn\u2019t reproduce (because involve reimaging again). Basically, the FLASH diskgroup was not created. But in last May I reimaged another ODA using the same patch\/imageversion (18.3.0.0 &#8211; Patch 27604623) and was possible to [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[55,29,77,78,5],"tags":[80,81,79,65],"class_list":["post-487","post","type-post","status-publish","format-standard","hentry","category-asm","category-database","category-engineeredsystems","category-oda","category-oracle","tag-asm","tag-grid","tag-oda","tag-oracle"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - 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