Troubleshooting guide

1-14
Cisco Wide Area Application Services Configuration Guide
OL-26579-01
Chapter 1 Configuring File Services
Configuring File Services
Table 1-3 Preposition Time and Size Limitations
Field Description
Total Size as % of
Cache Volume
Percentage of the overall Edge WAE cache that prepositioned files can
consume. For example, if you do not want this prepositioning directive to
consume more than 30 percent of a WAE’s cache, enter 30 in this field. The
default value is 5 percent.
The percentage of the cache defined for a preposition task defines the
maximum size that can be prepositioned in a single iteration of the task
regardless of how much is already in the cache.
When the cache is full, regardless of the reason, prepositioning operates like
on-demand caching: an eviction process begins and the files with the oldest
time-last-accessed values are removed from the cache.
Max File Size Maximum file size that can be exported. Files that are larger than this value are
not exported to the WAE cache.
Min File Size Minimum file size that can be exported. Files that are smaller than this value
are not exported to the WAE cache. It is inefficient to preposition files smaller
than 20 KB because these files can be retrieved quickly over the WAN through
normal WAAS.
The default value is 20 KB.
Duration Maximum amount of time it should take WAAS to export the file server. If it
takes WAAS longer than this amount of time to export the file server, WAAS
stops the exporting process before all files are copied to the Edge WAE cache.
If the preposition task does not start at the scheduled start time (for example,
because the Edge and the Core have no connection), the start retries are
counted in the duration.
If you do not specify a value for this field, WAAS takes as much time as needed
to export this file server.
Type
Time filter on the scan process. From the Type drop-down list, choose one of
the following options:
• All Files—Exports all files to the Edge WAE cache. This is the default
setting.
• Files changed since last preposition—Exports only the files that have
changed since the last preposition to the Edge WAE cache. This
differential filter is applied from the second iteration of a task execution
onward.
If a new directory is moved to an already prepositioned directory (without
changing its last-modified time), this new directory is not prepositioned
during the next prepositioning session when you choose this option.
• Files changed since last—Exports only the files that have changed within
the specified time. For example, if you want to push out file updates that
have been made on the file server in the last two hours, enter 2 in the
provided field and choose hour from the drop-down list.