Svetoslav Gyurov technical blog

Exadata patch pre-check fails due to wrong server model

I've been mostly busy with OCI-C and OCI in the past three years but occasionally I have to patch Exadata systems. That's what I have been doing every quarter for a Norwegian customer, patch their prod and non-prod Exadata systems in two consecutive weekends. The Exadata configuration was an X5-2

Provisioning Oracle database home 19c on ExaCS X8M fails

As the title suggests, I tried the other day to provision database home 19c on my X8M system and it failed. I managed quickly to find what the issue is and it comes down to file permissions. The Exadata Cloud Service X8M is using the new resource model so that

Upgrading Exadata Cloud Service databases 19c

Few days ago Oracle announced another OCI feature. You can now upgrade Exadata Cloud Service databases to Oracle Database version 19c through the console or API. It's great to see the availability of these new features, as simple as they are it's what makes the cloud more feasible and mature.

oracle

Installing Oracle BIP 12.2.1.4

As part of my middleware journey I had to install BI Publisher (BIP) on Supercluster (Solaris) and was surprised by the error below: [2020-08-19T16:19:51.077+01:00] [as] [NOTIFICATION] [] [oracle.as.install.engine.modules.validation.oracle.as.install.engine.modules.validation.handler.homeQueries.verifyAllDependencies] [host: soahost1] [nwaddr: 192.

cloud

Scaling Exadata Cloud Service X8M Compute

Following my last week post on how to provision Exadata Cloud X8M service, I'm going further this week with scaling the infrastructure with more compute nodes. Until now scaling an existing X6, X7 or X8 systems in OCI would require moving the system to a different fixed shape configuration. For

cloud

Provisioning Exadata Cloud Service X8M

About a month ago Oracle released Exadata X8M in Oracle Cloud Infrastructure. Except for finally getting X8M in the cloud the major feature of this release is the ability to provision elastic configurations. That's not a new Exadata feature and I've used it many times in the past. However, it's

oracle

High availability deployment of Oracle SOA and MFT 12.2.1.4

Long time no updates from me. Hope you are all well. I'm currently working on a Supercluster project where I provide database support. To help my colleagues and the whole project I decided to step out of my comfort zone and install the latest 12.2.1.4 version of

oracle

Datapatch fails to rollback patch 25985768

Well it's been almost three years since my last post and while I haven't blogged for that long I am still working with Oracle technologies. I joined Accenture Enkitec Group in February 2018 and I've been working on a big migration project to Oracle Cloud Infrastructure for a UK customer

cloud

How to install Oracle Database Cloud Backup Module

I had the joy of using the Oracle Database Cloud backup module a month ago. Needless to say that things changed since last year and some of the blogs posts I found were not relative anymore. I used the database cloud backup module to take a backup of a local

exadata

Oracle Database 12.2 released for Exadata on-premises

We live in exciting times, Oracle Database 12.2 for Exadata was released earlier today. The 12.2 database was already available on the Exadata Express Cloud Service and Database as a service for a few months now. Today, it has been released for Exadata on-premises, five days earlier than

exadata

Upgrading to Exadata 12.1.2.2.0 or later - mind the 32bit packages

This might not be relevant anymore, shame on me for keeping it draft for few months. However, there are still people running an older versions of Exadata storage software and it might still help someone out there. With the release of Exadata storage software 12.1.2.2.0, Oracle

onecommand fails to change storage cell name

It's been a busy month - five Exadata deployments in the past three weeks and new personal best - 2x Exadata X6-2 Eighth Racks with CoD and storage upgrade deployed in only 6hrs! An issue I encountered with the first deployment was that onecommand wouldn't change the storage cells names.

Unable to perform initial elastic configuration on Exadata X6

I had the pleasure to deploy another Exadata in the first week of 2017 and got my first issue this year. As we know starting with Exadata X5, Oracle introduced the concept of Elastic Configuration. Apart from allowing you to mix and match the number of compute nodes and storage

oem

Installing OEM13c management agent in silent mode

For many customers I work with SSH won't be available between the OEM and monitoring hosts. Therefore you cannot push the management agent on to the host from the OEM console. Customer might have to raise CR to allow SSH between the hosts but this might take a while and

Exadata memory configuration

Read this post if your Exadata compute nodes have 512/768GB of RAM or you plan to upgrade to the same. There has been a lot of information about hugepages and I wouldn’t go into too much details. For efficiency, the (x86) CPU allocates RAM by chunks (pages) of

bgoug

Speaking at BGOUG and UKOUG

It's my pleasure to be speaking at BGOUG and UKOUG again this year. The coming Wednesday 19th Oct, I'll be speaking at the UKOUG Systems SIG event here in London. I'll talk about Exadata implementations I did last year and issues I encountered. Also, things you need to keep in

oracle

OTN Appreciation Day: Oracle Data Guard Fast-Start Failover

Thank you, Tim, for the great idea. There are so many cool database features one could spend weeks blogging about them. A feature which I like very much is Oracle DataGuard Fast-Start Failover, FSFO for short. Oracle DataGuard Fast-Start Failover was one of the many new features introduced in Oracle

exadata

How to enable Exadata Write-Back Flash Cache

Yes, this is well-known and the process has been described in Exadata Write-Back Flash Cache - FAQ (Doc ID 1500257.1) but what the note fails to make clear is that you do NOT have to restart cell services anymore hence resync the griddisks! I had to enable the WBFC

exadata

Extending an Exadata Eighth Rack to a Quarter Rack

In the past year I've done a lot of Exadata deployments and probably half of them were eighth racks. It's one of those temporary things - let's do it now but we'll change it later. It's the same with the upgrades - I've never seen anyone doing an upgrade from

bug

Grid Infrastructure 12c installation fails because of 255 in the subnet ID

I was doing another GI 12.1.0.2 cluster installation last month when I got really weird error. While root.sh was running on the first node I got the following error: 2016/07/01 15:02:10 CLSRSC-343: Successfully started Oracle Clusterware stack 2016/07/01 15:02:

How to resolve missing dependency on exadata-sun-computenode-minimum

I've been really busy last few months - except spending a lot of time on M25 I've been doing a lot of Exadata installations and consolidations. I haven't posted for some time now but the good news is that I got many drafts and presentations ideas. This is a quick

Dead Connection Detection in Oracle Database 12c

In my earlier post I discussed what Dead Connection Detection is and why you should use it – read more here Oracle TNS-12535 and Dead Connection Detection The pre-12c implementation of DCD used TNS packages to “ping” the client and relied on the underlying TCP stack which sometimes may take longer.

Oracle Exadata X6 released

Oracle has just announced the next generation of Exadata Database Machine – X6-2 and X6-8. Here are the changes for Exadata X6-2: 1) X6-2 Database Server: As always the hardware has been updated and the 2-socket database servers are now equip with latest twenty two-core Intel Xeon E5-2699 v4 “Broadwell” processors

Oracle TNS-12535 and Dead Connection Detection

These days everything goes to the cloud or it has been collocated somewhere in a shared infrastructure. In this post I'll talk about sessions being disconnected from your databases, firewalls and dead connection detection. Changes We moved number of 11g databases from one data centre to another. Symptoms Now probably

Exadata onecommand fails at cell disk creation

I was installing another Exadata last month when I got an error on create cell disks step. I've seen the same error before when I was extending two to three rack Exadata configuration but thought it was one-off. The cell disk creation failed as below: [root@exa01db01 linux-x64]# ./install.sh