Migration is the process of copying the schema objects and data from a non-Oracle database, such as MySQL, Microsoft SQL Server, Sybase Adaptive Server, Microsoft Access, or IBM DB2, to an Oracle database.
To migrate a third-party database to Oracle easily, you can choose the following options using SQL Developer:
– Migrating using the Migration Wizard
– Copying tables to Oracle
Migrating Using the Migration Wizard
The Migration wizard provides a screen to manage all the steps needed for the migration to Oracle database. These steps are as follows:
– Capturing the source database (MySQL, Microsoft SQL Server, Sybase Adaptive Server, Microsoft Access, IBM DB2),
– Converting it to Oracle format,
– Generating DDL,
– Performing the conversion.
After a brief explanation about the process of migration, let’s do a simple migration from SQL Server database to Oracle database.
1- I created sample SQL Server database named TALIPTEST.
2- The migration repository is a collection of schema objects that SQL Developer uses to manage metadata for migrations. For a migration repository create a database connection to convenient Oracle database and give following grants.
CREATE USER MIGRATIONS IDENTIFIED BY “migration”
DEFAULT TABLESPACE USERS
TEMPORARY TABLESPACE TEMP;
grant create session to migrations;
grant resource to migrations;
grant create view to migrations;
For multischema migrations, you must grant the privileges with the ADMIN option as follows.
grant resource to migrations with admin option;
grant create role to migrations with admin option;
grant alter any trigger to migrations with admin option;
grant create user to migrations with admin option;
19- Give a name for migration project and select a directory to write output.
20– Select third party database connection. You can migrate database on online or offline mode. If you choose online migration then Migration Wizard will perform all needed operations. If you choose offline migration then Migration Wizard will generate all needed DDL scripts.
21- Select SQL Server database which we want to migrate to Oracle.
22- Specify the conversion options. And click “Advanced Options” link to ensure “Microsoft SQL Server : Is quoted identifier on” option is selected.
23- Select target database connection.
24- If you select offline migration then offline migration script will be generated in the project output directory.
25- Select the connections to be used for online data move.
26- Click “Finish” button so start migration.
27- Migration and conversion process will be perfomed as follows.
Now, Our SQL Server database in Oracle 🙂
Copying tables to Oracle
Right click the table located in third party database and click “Copy To Oracle”
Select destination (Oracle) database connection and click “Apply” button. If you choose “Include Data” check box it will create table structure and move data.
Copy to Oracle database is finished.
Note: This method doesn’t move indexes, triggers, etc. It only moves table structure and data.
1C-Bitrix Corporate Portal 18.5.180.tar.gz
Rename and unpack the distribution archive in the ssh command line or using the hosting control panel with the command:
tar xzvf bitrix24_source.tar.gz
2. In the browser, run http: //name-your-site.ru/index.php
3. Follow the instructions of the installer;
4. On the encoding selection screen, ALWAYS select the UTF-8 encoding;
5. When you get to the license entry field – enter PTR-ML-BXPR18XXXXXXXXXX – instead of “X”, any numbers or capital Latin letters.
6. Follow the instructions of the installer.
7. Profit !!
This is my ongoing work at using multiple ADSL services and the Mikrotik PCC rules along with some inbound mangling to allow a single router to load balance traffic across as many non bonded links as required.
Updated: 7th Jan 2010 – notes: added static routing marks for inbound traffic as inbound should never fall over to backup routes, while outbound should go over whatever is available. Also cleaned up routing order so it’s easier to read.
Note that none of this config requires the use of IP addresses at all, as it simply uses the pppoe-client interfaces and your lan interface to mark traffic. In my example wan1-pppoe,wan2-pppoe,wan3-pppoe are used and lan
Some of the most requested topics folks ask me for are multi-WAN and load balancing implementations. Unfortunately, as easy as most solutions are on MikroTik, these aren’t simple. Many vendors like Ubiquiti have wizards that you can use during the initial device setup to configure multi-WAN and load balancing, but that hasn’t come to RouterOS yet. Those wizard-based implementations are still complex, but that complexity is hidden from the device administrators.
Using a load balanced multi-WAN setup helps us meet a few design goals:
Failover in case of ISP failure
Increase total available bandwidth for users
Distribute bandwidth utilization across providers
Something that should be noted before you go further – this is a fairly complex topic. Multi-WAN and load balancing requires us to configure multiple gateways and default routes, connection and router mark Mangle rules, and multiple outbound NAT rules. If you aren’t familiar with MikroTik firewalls, routing, and NAT then it might be best to put this off until you’ve had some time to revisit those topics.
A single MikroTik router is connected to two ISPs (Charter and Integra Telecom) on ether1 and ether2 respectively, and a LAN on ether3. Traffic from the LAN will be NAT’d out both WAN ports and load balanced. See the topology below:
At this point you could stop configuring the router and things would work just fine in a failover situation. Should one of the two providers go down the other would be used. However there is no load-balancing, and this is strictly a failover-only solution. Most organizations wouldn’t want to pay for a second circuit only to have it used just when the first goes down.
Input Output Marking
One problem with having more than one WAN is that packets coming in one WAN interface might go out the other. This could cause issues, and may break VPN-based networks. We want packets that belong to the same connection to go in and out the same WAN port. Should one provider go down the connections across that port would die, then get re-established over the other WAN. Mark connections coming in the router on each WAN:
This helps the router keep track of what port each connection came in from.
Now we’ll use the connection mark just created for packets coming IN to trigger a routing mark. This routing mark will be used later on in a route that tells a connection which provider’s port to go OUT.
Connections that have been marked then get a routing mark so the router can route the way we want. In the next step we’ll have the router send packets in the connections with those marks out the corresponding WAN interface.
LAN Route Marking
Some special Mangle rules are needed to tell the router to load balance headed across the router from the LAN. How this load balancing works is beyond the scope of this article, but suffice to say a lot of hashing happens. If you want to learn more check out the MikroTik documentation.
These rules tell the router to balance traffic coming in ether3 (LAN), heading to any non-local (!local) address over the Internet. We grab the traffic in the pre-routing chain, so we can redirect it to the WAN port that we want based on the routing mark.
The following commands balance ether3 LAN traffic across two groups:
NOTE: The routing marks above are the same in this step as they were in the previous step, and correspond with the routes we’re about to create.
Special Default Routes
At this point we’ve marked connections coming in the WANs, and used those connection marks to create routing marks. LAN load balancing steps above also create routing marks, and they correspond with what the next step does. Create default routes that grab traffic with the routing marks we created above:
Note: These routes only get applied with a matching routing mark. Unmarked packets use the other default route rule created during router setup.
Routes that came in the Charter connection get a connection mark. That connection mark triggers a routing mark. The routing mark matches the mark in the route above, and the return packet goes out the interface it came in.
Here’s what we’ve configured:
New connections inbound on a WAN get marked
Connections with that mark get a routing mark
LAN traffic heading outbound gets load balanced with the same routing marks
Routing marks match default gateway routes and head out that interface
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