The lib_sync function synchronizes the data loaded into the working environment with the data stored in the library list. Synchronization is necessary only for libraries that have been loaded into the working environment. The function copies data from the working environment to the library list, overwriting any data in the list. The function is useful when you want to update the library list, but are not yet ready to unload the data from working memory.

Note that the lib_sync function does not write any data to disk. Also note that the lib_sync function will not automatically remove any variables from the library list that have been removed from the workspace. To remove items from the library list, use the lib_remove function. To write data to disk, use the lib_write function.

lib_sync(x, name = NULL)



The data library to synchronize.


The name of the library to sync if not the variable name. Used internally.


The synchronized data library.

See also


# Create temp directory
tmp <- tempdir()

# Create library
libname(dat, tmp)
# library 'dat': 0 items
# - attributes: not loaded
# - path: C:\Users\User\AppData\Local\Temp\RtmpCSJ6Gc

# Load the library 

# Add data to the workspace
dat.mtcars <- mtcars
dat.beaver1 <- beaver1
dat.iris <- iris

# Sync the library
# library 'dat': 3 items
# - attributes: loaded
# - path: C:\Users\User\AppData\Local\Temp\RtmpCSJ6Gc
# - items:
#      Name Extension Rows Cols   Size LastModified
# 1 beaver1        NA  114    4 4.6 Kb         <NA>
# 2    iris        NA  150    5 7.1 Kb         <NA>
# 3  mtcars        NA   32   11   7 Kb         <NA>

# Clean up