How cache auto-cleanup works

Thin Client 3.6.41 introduced cache limits and cache auto-cleanup, helping users to save disk space and keep locally only the files that are actually needed.

• By default, cache size limit is 10% of the disk size, but not less than 5 GB and not more than 100 GB. When the total size of cached files exceeds this limit, the files accessed longest time ago will be removed from cache automatically to keep it within the limit
• Files that haven't been accessed for more than 180 days will be removed from cache automatically, even if they didn't reach the cache size limit
• Files with sizes exceeding the maximum cache size limit can still be downloaded when opened
• Files that were accessed less than 2 hours ago are never removed automatically
• Files explicitly selected for offline use by clicking "Always keep on this device" don't count towards the cache limit and aren't removed from cache automatically

How to adjust cache cleanup parameters

User interface to control cache settings might be added in the future. In the meantime, if you need to adjust these settings, open the program folder in Program Files, then navigate to conf folder, open config.ini and add the following lines to the [cassia] section. 

Adjusting the period for keeping not accessed files:

• auto_remove_cached_files_min = 259200 (in minutes, 180 days by default) will set for how long the app will keep the cache for non-accessed files before deleting it automatically

Overriding calculated cache size with a hard value:

• maximum_cache_size_mb = 20480 (in megabytes, not used by default, 20 GB in this example) will set a fixed, non-calculated cache size limit. When added, this will override the three parameters below

Adjusting calculation rules for cache:

• cache_disk_size_percentage = 10 (in percents, 10% by default) will set the percentage of the disk size to allocate for cache
• min_cache_size_mb = 5120 (in megabytes, 5 GB by default) will set the minimum possible cache size even if it's more than the percentage specified above
• max_cache_size_mb = 102400 (in megabytes, 100 GB by default) will set the maximum possible cache size even if it's less than the percentage specified above

After saving changes, restart the service or reboot your computer for the new settings to take effect.

Known limitations

Cache auto-cleanup currently doesn't remove partially downloaded cache that could accumulate when you navigate through folders and the operating system requests file thumbnails or other properties. 

In a future release, we will make such partial cache files smaller to save disk space; we will also include them in auto-cleanup. 

In the meantime, if you still observe large amounts of space used by cache, you can right-click on the folder representing a root (team share) and choose "Free up space".

Additional Thin Client instructions

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