The full rack x22 has 6 cpus per node with intel xeon 5670 processors and a total of 8 database server nodes. The best oracle exadata interview questions updated 2020. A leading biotech firm in california has successfully deployed oracle exadata database machine exadata for their sales and marketing data warehouse. Exadata database machine x88 high capacity hc half rack 935,000 112,200 74,800 28,050 1, 2, 9, 14 database machine base configurations exadata database machine x8m2 extreme flash ef quarter rack 384 gb per database server 363,000 43,560 29,040 10,890 1, 2, 9, 14. X22 14th rack exadata server that was initially configured in 2012. On a fullrack exadata server, the 5 tb of flash cache can store a significant amount of data. The pictures below highlight the differences between the two configurations. This topic explains how to use the dbaascli utility to perform patching operations for oracle grid infrastructure and oracle database on an exadata db system. Oracle exadata patching although patching an oracle database is a common task for most dbas, exadata patching can be a more intricate process, as it incorporates the complexity of patching a number of components in the exadata systems. In the past we were used to standard oracle predefined exadata machine configurations. Though the concepts of an eighth rack, quarter rack, half rack and full rack still remain to this day you are also free to increase a base configuration in increments on a storage server or a database node at a time. Exadata storage server patchingan exadata storage server patch may contain updates to firmware and operating sysem to apply on database servers known as a database server minimal pack.
The position of the 2 leafs is usually in u20 and u24 and the spine is located in the very bottom position, u1. Manage the archives destination setting up flashcache mode to writethrough or writeback is an. Hi sulimo, when you buy a halfrack of exadata x2, you must choose either high capacity hc or high performance hp disks. An exadata db system consists of a base system, quarter rack, half rack, or full rack of compute nodes and storage servers, tied together by a highspeed, lowlatency infiniband network and intelligent exadata software.
It just means that there is the possibility that the votingocr may. General exadata patching question oracle community. Oracle exadata database machine can be extended from a quarter rack to half. Voting disks require 5 failure groups or 5 exadata cells.
Exadata database machine x22 half rack version all versions and later exadata database machine x22 hardware version all versions and later exadata database machine x22 qtr rack version all versions and later information in this document applies to any platform. Exadata upgrade adding x52 half rack to x32 existing. The latest quarterly full stack patch was released on october 17th for exadata. For those who dont know what the patchmgr utility is. What benefit we can get if we apply bundle patch on exadata in rolling fashion while asm configured with high redundancy. Bundle patches include fixes to both gi and db homes. So it is time to share my experience and findings from applying the bundle patch 6. Nonrolling patching can be done with minimum time if planned properly. Enhanced lightsout patching for exadata storage cells. The spine switch in the oracle exadata database machine half rack or oracle exadata database machine full rack remains as the spine switch. Step by step exadata compute node patching 18c netsoftmate.
Exadata interview questions and answers orasolution. This patch contains all of the latest recommended patches for the exadata database machine. It is supported to run different exadata versions between servers. Here are the concepts of exadata patching to make exadata dba life easy patching database is a common task for a remote dba, but when we talk about exadata patching it. Extending a halfrack exadata database machine to a fullrack with zero downtime. Most of exadata machines have 2 leafs of infiniband switches and 1 spine. A single full rack exadata database machine x52, with 8 database servers and 14. If you are new to exadata patching you should hopefully find some important points below. I would like to share some of my tipsnotes about patching oracle exadata. Here are the concepts of exadata patching to make exadata. On each exadata cloud at customer system, you can create one or more databases. Eighth rack, quarter rack, half rack and full rack, which is still possible, but not flexible enough. You can still do rolling patching with a 14 rack, and still get ha in most cases.
The exadata appliance configuration comes as a full rack, half. Maintain the existing seven interswitch links between the leaf switches within each rack. The exadata model if available, if not, it shows nothing or nothing for a nonexadata rac. Exadata how to install a brand new exadata x2 to x7 how to patch exadata upgrade exadata to 18c and 19c how to manage os dependencies when upgrading to 19c how to reimage an exadata database server how to reimage an exadata cell storage server exawatcher.
Oracle exadata interview questions and answers exadata. Pythian step by step patching scenario half rack ofv2 exadata 4 database nodes, 7 cell nodes exadata storage cell patch upgrade to 11. Extending a halfrack exadata database machine to a full. Exadata x42 half rack 4 compute nodes, 7 storage cells and 2 ib switches running ess version 12. The exadata network grid consists of multiple sun qdr infiniband switches. You can access ib switches using command line and web. For more details, refer to my oracle support note titled database machine and exadata storage server 11g release 2 11. Reduce risk with oracle exadata patching and upgrades. Multirack cabling tables for oracle engineered system. Nonrolling patches are applied while the database is offline and unavailable. In order to patch the switches, you must apply the patch in the spine switch first, rebooting and waiting it to back online before proceeding to the next switches leafs. Exadata compute nodes and storage cells are configured with dualport infiniband ports and connect to each of the two leaf switches. Further, exadataspecific ha capabilities such as instant detection of compute and storage server failures and exadata io latency capping, significantly enhance the availability of exadata. Extending a halfrack exadata database machine to a full rack with zero downtime.
In the mos note exadata patching overview and patch testing guidelines doc id 1262380. Oracle exadata database machine is also available in specific configurations, such as a full rack, half rack, quarter rack or eighth rack. What you dont want is a slow or unreliable network connection that disconnects you in the middle of the the application of the patch. Exadata cloud at customer also comes with cloudspecific software tools that assist with administration tasks, such as backup, recovery, and patching.
Oracle exadata database machine hardware components by model these tables list the components included for each type. Expect one storage server patch to take about two hours. The new exadata x62 eighth rack high capacity configuration has half. This is written solely for myself and any mistake ambiguity in the post reported with the highly appreciable.
Approximate 3 hours per cell and db server including. For those who are new to the exadata party and dont know of a world without elastic configurations, a quarterrack is a machine with two compute nodes and three storage cells. All versions should be the same on each cell at this point. How much time required to apply bundle patch on half rack exadata database machine with rolling option. Actually, there are some exadata machines that have the spine switch in the half or quarter rack, but usually only the full rack should have it. How to patch an exadata part 1 official pythian blog. It is recommended to use vnc or screen utility for patching to avoid disconnections due network issues. Connect the leaf switches between the racks with two links each, using the ports reserved for external connectivity. Exadata patching overview and patch testing guidelines. As we know about oracle exadata, the exadata rack has a different.
Oracle exadata database machine x72 and x78 full rack, half rack, quarter rack, and eighth rack. Basically, you need at least 5 storage cells for each exadata environment if you want to have true high availability with your exadata machine. The utility requires root or sudo administration privileges. Ib switches are used for the storage network as well as the oracle rac interconnect. Based on the output you list, it looks like you purchased the hc version, meaning that your storage servers are populated with 3tb disks. Hardware components of oracle exadata database machine.
A small amount is allocated for database logging, and the remainder is used for caching user data. Means its your x7 or x6 machine, is it half rack or full rack. Step by step exadata storage server patching 18c netsoftmate. Up until now, eighth rack configurations had all the hard disks and flash cards installed but only half of them were usable. The above demonstration has been done on our accenture enkitec exadata lab environment, using an x32 quarter rack. Patching of one exadata cells failed with error unable to.
Execute the imageinfo command on one of the compute nodes to identify the current exadata. Oracle exadata database machine x62 full rack, half rack, quarter rack, and eighth rack. Recently did an exadata expansion project on x3 half rack and making it a full rack by adding x5. The exadata storage server comes with a substantial amount of flash storage. A more recent exadata generation respectively a half or full rack would most likely deliver even better results. But because of multiple factorscutbacks, skill and resource gaps, resource shortagesthe exadata server had not been patched for last two years. Half rack exadata v2 customers could opt for the other half with the stony bridge intel processors in the new hardware and run the new exadata software on the whole rack and could also move to oracle 12c. In addition, patch application to existing switches and servers should be done. That summarizes to 14 hours for seven storage servers patching time with the rolling method. You can configure automatic backups, optimize for different workloads, and scale up the system to meet increased demands. Select 10% of the entire storage use only 1% of the data it gets to gain performance, the db needs to shed weight. If your network is not reliable, you should consider other options such as the kdm, or directly connecting to the switch between the exadata rack and your network if possible. Exadata patching rolling vs nonrolling umair mansoobs blog.
Step by step exadata infiniband switch patching 18c. This is my first blog which i wrote with the help of content available on internet. Exadata x2 has 4 configuration with high performance or high capacity options. Install and configure vnc server on exadata compute node 1.