Re: [External] Multiple COPY on the same table

Hey Ravi,

What is the goal you are trying to achieve here.
To make pgdump/restore faster?
To make replication faster?
To make backup faster ?

Also no matter how small you split the files into, if network is your bottleneck then I am not sure you can attain n times the benefit my simply sending the files in parallel but yeah maybe some benefit.
But then for parallel processing you also need to ensure your server is having relevant resources or else it will just be a lot of context switching I guess ?
Pg dump has an option to dump in parallel
pgbasebackup is single threaded I read but pgbackrest can allow better parallel processing in backups.
There is also logical replication where you can selectively replicate your tables to avoid bandwidth issues.
I might have said a lot and nothing may be relevant, but you need to let us know the goal you want to achieve :)

Regards,
Vijay
________________________________
From: Ravi Krishna <sravikrishna(at)aol(dot)com>
Sent: Monday, August 20, 2018 8:24:35 PM
To: pgsql-general(at)lists(dot)postgresql(dot)org
Subject: [External] Multiple COPY on the same table

Can I split a large file into multiple files and then run copy using each file. The table does not contain any
serial or sequence column which may need serialization. Let us say I split a large file to 4 files. Will the
performance boost by close to 4x??

ps: Pls ignore my previous post which was without a subject (due to mistake)