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Request compaction of the specified database

Source: R/db_compact.R
db_compact.Rd

Request compaction of the specified database

Usage

db_compact(cushion, dbname, as = "list", ...)

Arguments

cushion

A Cushion object. Required.

dbname

Database name. Required.

as

(character) One of list (default) or json

...

Curl args passed on to HttpClient

Value

JSON as a character string or a list (determined by the as parameter)

Details

Compaction compresses the disk database file by performing the following operations:

  • Writes a new, optimised, version of the database file, removing any unused sections from the new version during write. Because a new file is temporarily created for this purpose, you may require up to twice the current storage space of the specified database in order for the compaction routine to complete.

  • Removes old revisions of documents from the database, up to the per-database limit specified by the _revs_limit database parameter.

Compaction can only be requested on an individual database; you cannot compact all the databases for a CouchDB instance. The compaction process runs as a background process. You can determine if the compaction process is operating on a database by obtaining the database meta information, the compact_running value of the returned database structure will be set to true. See GET /db. You can also obtain a list of running processes to determine whether compaction is currently running. See "/_active_tasks"

Examples

if (FALSE) {
user <- Sys.getenv("COUCHDB_TEST_USER")
pwd <- Sys.getenv("COUCHDB_TEST_PWD")
(x <- Cushion$new(user=user, pwd=pwd))
# db_compact(x, dbname = "iris")
}