| Name : pgpool-II
| |
| Version : 4.4.2
| Vendor : obs://build_opensuse_org/server:database
|
| Release : 39.35
| Date : 2023-09-28 22:56:23
|
| Group : Productivity/Databases/Tools
| Source RPM : pgpool-II-4.4.2-39.35.src.rpm
|
| Size : 6.08 MB
| |
| Packager : (none)
| |
| Summary : A connection pooling/replication server for PostgreSQL
|
Description :
pgpool-II is a middleware that works between PostgreSQL servers and a PostgreSQL
database client. It provides the following features.
* Connection Pooling
pgpool-II saves connections to the PostgreSQL servers, and reuse them
whenever a new connection with the same properties (i.e. username, database,
protocol version) comes in. It reduces connection overhead, and improves
system\'s overall throughput.
* Replication
pgpool-II can manage multiple PostgreSQL servers. Using the replication
function enables creating a realtime backup on 2 or more physical disks,
so that the service can continue without stopping servers in case of a disk
failure.
* Load Balance
If a database is replicated, executing a SELECT query on any server will
return the same result. pgpool-II takes an advantage of the replication
feature to reduce the load on each PostgreSQL server by distributing SELECT
queries among multiple servers, improving system\'s overall throughput. At
best, performance improves proportionally to the number of PostgreSQL servers.
Load balance works best in a situation where there are a lot of users executing
many queries at the same time.
* Limiting Exceeding Connections
There is a limit on the maximum number of concurrent connections with PostgreSQL,
and connections are rejected after this many connections. Setting the maximum
number of connections, however, increases resource consumption and affect system
performance. pgpool-II also has a limit on the maximum number of connections, but
extra connections will be queued instead of returning an error immediately.
* Parallel Query
Using the parallel query function, data can be divided among the multiple servers,
so that a query can be executed on all the servers concurrently to reduce the
overall execution time. Parallel query works the best when searching large-scale
data.
pgpool-II talks PostgreSQL\'s backend and frontend protocol, and relays a connection
between them. Therefore, a database application (frontend) thinks that pgpool-II is
the actual PostgreSQL server, and the server (backend) sees pgpool-II as one of its
clients. Because pgpool-II is transparent to both the server and the client, an
existing database application can be used with pgpool-II almost without a change to
its sources.
|
RPM found in directory: /packages/linux-pbone/ftp5.gwdg.de/pub/opensuse/repositories/server:/database:/postgresql/openSUSE_Tumbleweed/i586 |
