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There is a slot along each side of the plate for mounting with clamps. Aluminum plates are lightweight and have mild corrosion resistance. Iron plates are heavy duty for long term use. For technical drawings and 3-D models, click on a part number. Welcome to SLOTS GRAPE, the most prestigious casino community! For all the casino lovers around the world, we are introducing beautifully crafted casino games. Experience amazing slot machines in fascinating, high-quality graphics, meet and interact with fellow players on real Vegas style Blackjack tables, and enjoy BIN WINS, MEGA WINS, and GRAPE WINS. SLOTS GRAPE will make you feel a thrill. BRS Comments - A 4’ x 8’ table is what we consider the absolute minimum amount of space for a (two lane) 1/32 slot car track. A 5’ x 9’ Ping Pong size table would be a more ideal minimum table size. If you have more space, then consider extending the length of the table from 8-9 feet to 10-16 feet.

BRS Comments - A 4’ x 8’ table is what we consider the absolute minimum amount of space for a (two lane) 1/32 slot car track. A 5’ x 9’ Ping Pong size table would be a more ideal minimum table size. If you have more space, then consider extending the length of the table from 8-9 feet to 10-16 feet.

When it comes time to install the top on a table, it is important to come up with an approach that allows the table top to expand and contract freely with seasonal changes in humidity. If we don’t accommodate this movement, bad things are bound to happen. The table top could crack, or the movement could cause structural problems to the base.

The way that many woodworkers choose to install the table top to accommodate the movement is to use some sort of table top fasteners. You could choose to make your own table top fasteners, but there are also commercially viable options available that are inexpensive and easy to use. One of the popular types is a clip that attaches solidly to the table top, and the other end goes into a slot in the table rails. The slot is where the expansion and contraction can safely occur without causing problems to the table.

Installing a table top fastener clip requires an understanding of the mechanics of the device so that you can achieve maximum holding power. You can choose to cut the slots using a table saw, or as George demonstrates here, you can also use a biscuit joiner for this task. The basic steps include:

Determine the slot position. You need to establish the correct distance between the slot and the table top for optimal holding power, and George will show you the secret for doing this right.

Mill the slot. Once you’ve identified the fence height it is as simple as cutting a biscuit slot.

Install the clip. After the top is positioned, attach the clip with a screw and you’re done.

Now that your table is complete, take a look at more furniture making videos to determine what your next heirloom project will be!

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Important

Azure Database for PostgreSQL - Flexible Server is in preview

PostgreSQL's logical replication and logical decoding features are supported in Azure Database for PostgreSQL - Flexible Server, for Postgres version 11.

Comparing logical replication and logical decoding

Logical replication and logical decoding have several similarities. They both

  • allow you to replicate data out of Postgres
  • use the write-ahead log (WAL) as the source of changes
  • use logical replication slots to send out data. A slot represents a stream of changes.
  • use a table's REPLICA IDENTITY property to determine what changes can be sent out
  • do not replicate DDL changes

The two technologies have their differences:Logical replication

  • allows you to specify a table or set of tables to be replicated
  • replicates data between PostgreSQL instances

Logical decoding

  • extracts changes across all tables in a database
  • cannot directly send data between PostgreSQL instances

Pre-requisites for logical replication and logical decoding

  1. Set the server parameter wal_level to logical.
  2. Restart the server to apply the wal_level change.
  3. Confirm that your PostgreSQL instance allows network traffic from your connecting resource.
  4. Grant the admin user replication permissions.

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Using logical replication and logical decoding

Logical replication

Logical replication uses the terms 'publisher' and 'subscriber'.

  • The publisher is the PostgreSQL database you are sending data from.
  • The subscriber is the PostgreSQL database you are sending data to.

Here's some sample code you can use to try out logical replication.

  1. Connect to the publisher database. Create a table and add some data.

  2. Create a publication for the table.

  3. Connect to the subscriber database. Create a table with the same schema as on the publisher.

  4. Create a subscription that will connect to the publication you created earlier.

  5. You can now query the table on the subscriber. You will see that it has received data from the publisher.

You can add more rows to the publisher's table and view the changes on the subscriber.

Visit the PostgreSQL documentation to understand more about logical replication.

Logical decoding

Logical decoding can be consumed via the streaming protocol or SQL interface.

Streaming protocol

Consuming changes using the streaming protocol is often preferable. You can create your own consumer / connector, or use a third-party service like Debezium.

Visit the wal2json documentation for an example using the streaming protocol with pg_recvlogical.

SQL interface

In the example below, we use the SQL interface with the wal2json plugin.

  1. Create a slot.

  2. Issue SQL commands. For example:

  3. Consume the changes.

    The output will look like:

  4. Drop the slot once you are done using it.

Visit the PostgreSQL documentation to understand more about logical decoding.

Monitoring

You must monitor logical decoding. Any unused replication slot must be dropped. Slots hold on to Postgres WAL logs and relevant system catalogs until changes have been read. If your subscriber or consumer fails or has not been properly configured, the unconsumed logs will pile up and fill your storage. Also, unconsumed logs increase the risk of transaction ID wraparound. Both situations can cause the server to become unavailable. Therefore, it is critical that logical replication slots are consumed continuously. If a logical replication slot is no longer used, drop it immediately.

The 'active' column in the pg_replication_slots view will indicate whether there is a consumer connected to a slot.

Set alerts on the Maximum Used Transaction IDs and Storage Used flexible server metrics to notify you when the values increase past normal thresholds.

Limitations

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  • Read replicas - Azure Database for PostgreSQL read replicas are not currently supported for flexible servers.
  • Slots and HA failover - Logical replication slots on the primary server are not available on the standby server in your secondary AZ. This applies to you if your server uses the zone-redundant high availability option. In the event of a failover to the standby server, logical replication slots will not be available on the standby.

Next steps

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  • Learn more about networking options
  • Learn about extensions available in flexible server
  • Learn more about high availability