ipfs

 docs.infura.io/infura/networks/ipfs

Postgres 14 MacOS App 2.5.6

 https://www.postgresql.org/download/macosx/

https://postgresapp.com/

• sudo mkdir -p /etc/paths.d &&
  echo /Applications/Postgres.app/Contents/Versions/latest/bin | sudo tee /etc/paths.d/postgresapp

PostgreSQL with these default settings:

Host	localhost
Port	5432
User	your system user name
Database	same as user
Password	none
Connection URL	postgresql://localhost

To connect with psql, double click a database. To connect directly from the command line, type psql. If you’d rather

SELECT datname FROM pg_database;

CREATE DATABASE hcyc;

\c hcyc

psql -U myuser -d mydb -a -f data.sql -W mypassword

To connect PostgreSQL to Hazelcast, you can use a middleware or a plugin which acts as a bridge between the two systems. There are several third-party libraries and tools available that can help you connect PostgreSQL and Hazelcast, such as:

• Hazelcast IMDG Connectors: Hazelcast provides connectors that allow you to connect to various data sources including PostgreSQL. The connectors can be used to replicate data between PostgreSQL and Hazelcast, or to use Hazelcast as a caching layer for PostgreSQL.

• JPA-Hazelcast: This is an open-source library that provides an implementation of the Java Persistence API (JPA) for Hazelcast. You can use it to map PostgreSQL tables to Hazelcast data structures, allowing you to query and manipulate data in both systems using JPA.

• HA-JDBC: This is a JDBC driver that provides load balancing and failover for a variety of database systems including PostgreSQL. You can use it in conjunction with Hazelcast to provide high availability for PostgreSQL.

• 
  

eclipselink

 install software eclipse latest JPA

user library

javax.persistence.Convert

jakarta

Oracle19c LogMiner

ORA-01325 archive log must be enabled

archive log - copy of redo log

delete of data

suspend archive on datapump

CL SCR

automatic log file slecction by specifying time frame timestamps

sqlplus -s 

SET LINESIZE 200;

alter session sset nlf_date_format = 'DD-MON-YYYY HH24:MI:SS';

ALTER DATATBASE ADD  SUPPLEMENTAL LOG DATA;

select supppliemental)log_data)min from V$DATABASE;

EXECUTE DBMS_LOGMNR.ADD_LOGFILE( -

    LOGFILENAME => 'PATH/fast_recovery_area/LGDB/archivelog/DATA/*.arc'. -

    options =>   DBMS_LOGMNR.NEW);>>

EXECUTE DBMS_LOGMNR.ADD_LOGFILE( 'path/redo1.log');

EXECUTE DBMS_LOGMNR.START_LOGMINER( -

        OPTIONS=>DBMS_LOGMNR.DICT_FROM_ONLLINE_CATALOG);

    STARTTIME => '01-Jan-2021 00:00:00', 

        ENDTIME =>

CONTINUOUS MINE IS GONE IN 19C

USE

DESC V$LOGMNR_CONTENETS

COLUMN X FORMAT A##;

SELECT OPERATION,USERNAME,OS_USENAME, SQL_REDO, TIMESTAMP FROM VS LOGMNR_CONTENTS;

DATA DICTIONARY USES UTL_FILE_DIR

localhost:1158/em

alter dataabae add suplimental log data(pirmary key) columns

alter system switch logfile; -- to force checkpoint

1. create init param on oracle db pointing to path \

init param can be pfile INIT.ora or spfile (server binary)

SHOW PARAMETERS UTL_FILE_DIR;

SHOW PARAMETERS	Issue this command to display the parameter values that are currently in effect.
V$PARAMETER view	Query this view to display the parameter values that are currently in effect.
V$PARAMETER2 view	Query this view to display the parameter values that are currently in effect. The output from this view is the same, but more readable, than the output from the V$PARAMETER view.
V$SPPARAMETER view	Query this view to display the current contents of the server parameter file. The view returns null values if a server parameter file is not being used by the instance.

alter system set UTL_FILE_DIR = path

then us the DBMS_LOGMNR_D.build in plsql 

to build dd

EXECUTE DBMS_LOGMNR_D.BUILD('datadict.ora', -

    'utl_file_dir_loc', -

    DBMS_LOGMNR_D.store_in-flat_file;>>

EXECUTE DBMS_LOGMNR.START_LOGMNR( -

    DICTFILENAME => 'PATH/datadict.ora');>

https://grepora.com/2020/05/13/19c-could-not-execute-dbms_logmnr-start_logmnr-ora-44609-continous_mine-is-desupported-for-use-with-dbms_logmnr-start_logmnr/

LogMiner dictionary provide table/column names

 

Oracle alter version control

create table fox_version
versionid number not null
version_date date default systimestamp

create unique index UK on fox_version ('1');

create user

grant view

grant unlimited tablespace

grant imp_full_dat    

grant connect

grant resource

Oracle 19c

Oracle 19c (12.2.0.3)

install

DISPLAY=localhost:0.0
export DISPLAY

global database name= orcl.cgi.com
SID=CUCSDB

ORACLE_BASE /ora/cucs/root

ORACLE_HOME=$ORACLE_BASE/19c/software

ORACLE_ROOT=/ora/c/root/cdb/19c

data=$ORACLE_ROOT/data

https://docs.oracle.com/en/database/oracle/oracle-database/12.2/cncpt/introduction-to-oracle-database.html#GUID-2B1BADE1-C36F-4555-9867-3B15B6CE858C


Container CDB
Pluggable PDB (multi tennant) in CDB

Remote Standby Database with Observer

A file system enables disk space to be allocated to many files. Each file has a name and is made to appear as a contiguous address space to applications such as Oracle Database. The database can create, read, write, resize, and delete files.

A file system is commonly built on top of a logical volume constructed by a software package called a logical volume manager (LVM). The LVM enables pieces of multiple physical disks to combine into a single contiguous address space that appears as one disk to higher layers of software.


/etc/oratab mounts db startup
/etc/fstab mount points

adrci > show alert

lsnrctl LISTNER

yum inst zip/unzip/xauth/vim

install xming modify XO.hosts

start xming :0.0

/etc/ssh/sshd_config

X11Fowarding yes

X11DisplayOffset 10

XAuthLocation /usr/bin/xauth

sudo systemctl restart sshd

puty ssh>x11>enable x11 forwarding

Xdisplay location localhost:0.0

./runInstaller

/ud1/oradata

/ue1/datapump

/uf1/fast_recovery_area

/us1/app/oracle/product/19/db_1/runInstaller

/us1/software - patches

/us1/tmp_install

pvdisplay

pvcreate /dev/sdb1

-lvs
vgs

vgextend Volugroup /dev/sb1

lvcreate -L 40G -h lv_rarw volgroup




fdisk -
/dev/xvda1,2,3


https://www.linuxquestions.org/questions/linux-newbie-8/aborted-journal-and-volume-remounted-read-only-812216/


pvs /dev/xvdd