DB2 11.1 BLU with DPF Monitoring scripts

I just wrapped a very large PoC for BLU with DPF with very high ingestion rate (110K messages per second) and as well as very high volume point queries (1500 queries per second) and I used the following queries to measure the various parameters and optimum tuning. The...

db2haicu disable / enable and scripting

It is recommended that you always update RSCT / TSA from db2 software media and not from IBM Fix Central. The reason – DB2 is tested and certified with the version that ships with the DB2 software. If you go to server_t/db2/linuxamd64/tsamp and run db2cktsa...

DB2 pureScale – No Product License found

In db2diag, you may see this message – No product license found. Sample output:  2017-05-19-13.00.58.511626-240 E2575E1007 LEVEL: Severe PID : 35363 TID : 70366589481392 PROC : db2start INSTANCE: purf01 NODE : 000 HOSTNAME: va33dlvudb001 FUNCTION: DB2 UDB, high...

DB2 pureScale instance creation hangs after GPFS

Hang Issue due to SMAP While creating DB2 pureScale instance, it appears that the node becomes unresponsive under RHEL 7.2. If you reboot the node and look at the /var/log/messages, you may notice these several messages: kernel:BUG: soft lockup - CPU#1 stuck for 23s!...

DB2 pureScale Health Check

More and more customers are now asking for some way to check the health of the DB2 pureScale system. Let’s just focus on few early diagnostics before we jump to the deep exploration at the SQL statement level. This is just akin going to primary health care...

How to detect log full condition

I have seen working with hundreds of customers a chronic LOG FULL condition and the shortcut people use is to increase the LOGPRIMARY and LOGSECOND. This solution works well for a single unit of work that can not fit into the total log space available. So, first...

Kernel upgrade and impact on pureScale

In Linux environment, it is a common practice to upgrade the kernel for security patches, vulnerability fixes etc. And if you are running a DB2 pureScale environment, it is likely that you are going to break the GPFS GPL as soon as you upgrade the kernel and this will...

GPFS Disk Cleanup

During pureScale instance creation, you might run into instance creation failed condition. Under some circumstances, it is possible that db2icrt does not perform a proper clean-up for GPFS and it may fail next time complaining that the disk is already a GPFS disk....

SQL fishing using WLM

The SQLs while DB2 is up and running can be captured in different ways such as: Query column STMT_TEXT from table functions such as MON_GET_ACTIVITY or WLM_GET_WORKLOAD_OCCURRENCE_ACTIVITIES, and MON_GET_ACTIVITY_DETAILS –> SQLs that have been submitted but...

Automatic Client Reroute – Templates

Here are two templates that one can use to make Automatic Client Reroute to work properly in a HADR environment. Please note that these instructions are only valid for HADR pair in which the second machine is ready to takeover. I will publish / update this article...

Rebuild TSA Resources in HADR Environment

This is about how to rebuild TSA resources in HADR environment if you have used db2haicu in past but added resources such as tie-breaker disks that are not supported by the db2haicu tool. So, in case of a difficulty – how do you get back soon. You can always...

DB2 11.1 Rebuild TSA Resources

When you get errors like this: "SQL1517N db2start failed because the cluster manager resource states are inconsistent." or something like "Cluster manager resource states for the DB2 instance are inconsistent. Refer to the db2diag.log for more information on...

DB2 pureScale Install Problem Determination

RSCT License Issue $ db2start 128 SQL1677N  DB2START or DB2STOP processing failed due to a DB2 cluster services error DATA #9 : SQLHA Remote Command Output, PD_TYPE_SQLHA_COMMAND_RESPONSE, 3508 bytes commandResponse->callRC: 0x00000000 commandResponse->output:...

DB2 purescale Install GPL Error

GPL Compile Problem When you try to install DB2 pureScale on Linux platform (RHEL or SLES), you may receive the error. ERROR: A missing Linux package is preventing the compilation of the IBM General Parallel File System (GPFS) Portability Layer (GPL) module. The...

db2start add member fails

If you try to add a member to a running cluster, you may get the following db2start error. ERROR: The "db2start add MEMBER 2 hostname node04.purescale.ibm.local netname node04.purescale.ibm.local port 0 -iupdt" command failed with the return code: "55", and following...

Install Dropline Neu! Icons in CentOS 7.2

One of my most favorite icons on GNOME has been Dropline Neu! for many years and I still have a copy of it since 2006. It is now hard to find. Download ICON-DroplineNeu.tar.bz2 And, copy to /tmp directory # cd /usr/share/icons # tar xvfj /tmp/ICON-DroplineNeu.tar.bz2...

Drop a member in DB2 pureScale by Force

If you need to drop a member in DB2 pureScale, the db2iupdt process requires that member to be available during the drop process. But, the actual world is more cruel than what db2iupdt thinks. For example: If you have a 3 member cluster and someone moved / migrated...

Enable Fast I/O Fencing Scipt for Linux

If you install DB2 pureScale in Linux, the Fast I/O Fencing does not get enabled automatically. If you refer to Knowledge Center for DB2, you will find number of steps to enable fast I/O fencing. After DB2 instance is created and databases are created, I usually run...

Find out Slot number of PCI Card

Use dmidecode -t slot to find out the slot numbers that are in USE and the Bus Address. Use that bus address in lspci -s <busaddress> to find out what is in the slot. For example: I have NIC in slot-7, Q-Logic in Slot – 2 and Mellanox in Slot – 3. I...