DevTech101

DevTech101

Month: December 2015

Testing HDFS Over WebHDFS By Using CURL

July 21, 2017 / By / Leave a Comment / Hadoop

A quick update on hdfs put/get/etc… Simplest solution to upload/download/delete/etc… Use webhdfs. samples are below. ————— Simple Example in one step. Note: In this example, replace node name with any of the 6 nodes [n01-n06] curl -L -i -X PUT -T source_file_name.pdf “http://n03.domain.com:50075/webhdfs/v1/user/usera/dest_file_name.pdf?user.name=usera&op=CREATE&user.name=usera&namenoderpcaddress=bda-cluster1-ns&overwrite=false” # Example You have a source file: solaris_openstack.pdf user.name: usera file dest: …

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How to recover from an Oracle DB archivelog full error

March 27, 2017 / By / Leave a Comment / OracleDB

How to recover from an Oracle DB if the disk/file system for archive logs gets full Note: if DB is hung at shutdown i.e. shu immediate, then force a shutdown, like below SQL> shutdown abort; SQL> startup nomount; SQL> alter database mount SQL> exit Get size used for if needed SQL> col name format A50 …

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ASM migrate from one lun to anther lun

March 3, 2017 / By / Leave a Comment / OracleDB

To add new disk array / lun sqlplus / as sysasm ALTER DISKGROUP DATA ADD DISK ‘/dev/rdsk/c1d1s0’ REBALANCE POWER 5; # Fastest ALTER DISKGROUP DATA ADD DISK ‘/dev/rdsk/c1d1s0’ REBALANCE POWER 11; To verify SQL> select path,name,header_status from v$asm_disk; To Check where the rebalnce is up to select INST_ID, OPERATION, STATE, POWER, SOFAR, EST_WORK, EST_RATE, EST_MINUTES …

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Configuring BDA

March 3, 2017 / By / Leave a Comment / BDA

How to add scoop2 Doc ID 1922701.1 If it fails use Doc ID 1966882.1 Note: Clear the directory before starting as old junk will make it fail. P.S. Make sure you are not removing other jar files. rm -r /var/lib/sqoop2/* Hive issues, make sure to set full rights to the hive tmp dir hadoop fs …

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Enterprise Manager Deleting Targets Manually With CLI

June 27, 2017 / By / Leave a Comment / Enterprise Manager 12c

Enterprise Manager deleting a target manually First stop the agent. ./emctl stop agent Oracle Enterprise Manager Cloud Control 13c Release 1 Copyright (c) 1996, 2015 Oracle Corporation. All rights reserved. Stopping agent … stopped. emcli login -username=sysman emcli sync emcli delete_target -name=”em-host.domain.com:3872″ -type=”oracle_emd” -delete_monitored_targets Now Uninstall the agent export ORACLE_HOME=export ORACLE_HOME=/u01/app/agent/core/12.1.0.2.0 $ORACLE_HOME/oui/bin/runInstaller -deinstall -removeallfiles # …

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Oracle Enterprise Manager 13c with Oracle DB Configuration Modifications

July 18, 2017 / By / Leave a Comment / Enterprise Manager 13c

How to increase Oracle Database log size alter database add logfile size 600m; alter database drop logfile group 1; select l.group# , l.bytes , l.status , l.archived , lf.member from v$logfile lf , v$log l where lf.group# = l.group#; alter system switch logfile; alter system checkpoint; alter database drop logfile group [ active log]; Change …

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Enterprise Manager Cloud Control 12c startup issues

March 3, 2017 / By / Leave a Comment / Enterprise Manager 12c

At startup first log directory /u01/app/oracle/gc_inst-r5/user_projects/domains/GCDomain/servers/EMGC_OMS1/logs/EMGC_OMS1.log After that log directory /u01/app/oracle/gc_inst/em/EMGC_OMS1/sysman/log/ Note: By setting memory to low, like below OMS will hang and never complete startup emctl set property -name ‘JAVA_EM_MEM_ARGS’ -value ‘-Xms256m -Xmx1740m’ How to increase the memory on EM 12c https://community.oracle.com/community/support/support-blogs/enterprise-manager-support-blog/blog/2015/01/20/how-to-tune-the-jvm-heap-memory-arguments-for-12c-oms-and-agent

Testing DNS performance – perl script

March 23, 2017 / By / Leave a Comment / solaris, solaris11.2

Use the perl script below to check your DNS performance. Make sure to replace the search string and your DNS provider IP address. #!/usr/bin/perl @ns = @ARGV; push(@ns,’8.8.8.8′, ‘4.2.2.1’) unless @ns; $domain = “www.devtech101.com”; use Net::DNS; use Time::HiRes; # high resolution timing required use Time::Stopwatch; use Number::Format qw(:subs); use Statistics::Descriptive; tie my $time, ‘Time::Stopwatch’; # …

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Oracle ODSEE to OUD Directory Replication or Migration

January 18, 2023 / By / Leave a Comment / LDAP, OUD

Contents 1 How to install and configure Odsee to oud directory replication 1.1 First install an OUD directory 1.2 Migrate ODSEE to OUD schema and roles 1.2.1 Set ODSEE compatibly 1.2.2 Migrate schema and roles 1.3 Get a one time ODSEE full export from 1.4 Clean Import ODSEE Data in OUD – OUD has to …

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